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| WoS | SCOPUS | Document Type | Document Title | Abstract | Authors | Affiliation | ResearcherID (WoS) | AuthorsID (SCOPUS) | Author Email(s) | Journal Name | JCR Abbreviation | ISSN | eISSN | Volume | Issue | WoS Edition | WoS Category | JCR Year | IF | JCR (%) | FWCI | FWCI Update Date | WoS Citation | SCOPUS Citation | Keywords (WoS) | KeywordsPlus (WoS) | Keywords (SCOPUS) | KeywordsPlus (SCOPUS) | Language | Publication Stage | Publication Year | Publication Date | DOI | JCR Link | DOI Link | WOS Link | SCOPUS Link |
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| ○ | ○ | Article | Contact line curvature-induced molecular misorientation of a surface energy patterned organic semiconductor in meniscus-guided coating | The printing of organic semiconductors (OSCs) by means of meniscus guided coating (MGC) has great potential for the fabrication of high-performance, uniform, and large area flexible electronics. Furthermore, surface energy patterning allows low-cost, large area manufacturing, and is a requirement for device isolation to achieve accurate drive and to minimize power consumption. We investigated the morphological and electrical characteristics of surface energy patterned OSCs coated using the MGC method. A unique phenomenon, contact line curvature-induced molecular misorientation effect, which occurs in the patterning of OSCs with the MGC method, is demonstrated. This effect is highly dependent on the pattern width which decided contact line curvature. It influences the charge transport properties and hence the field-effect mobility of organic thin-film transistors (OTFTs). OTFTs in widths ranging from 50 to 500 mu m were fabricated. The highest misorientation angle was induced in the 50 mu m pattern width and the corresponding OTFTs exhibited the highest mobility. | Kim, Do-Kyung; Vincent, Premkumar; Jang, Jaewon; Kang, In Man; Kim, Hyeok; Lang, Philippe; Choi, Muhan; Bae, Jin-Hyuk | Kyungpook Natl Univ, Sch Elect Engn, Daegu, South Korea; Univ Seoul, Dept Elect & Comp Engn, 163 Seoulsiripdaero, Seoul 02504, South Korea; Univ Paries Diderot, ITODYS, CNRS, UMR 7086,Paris 7, F-75013 Paris, France | ; Vincent, Premkumar/C-3190-2019; lang, philippe/E-5192-2012 | 57984042900; 57189221688; 57194107504; 7203062678; 57191718658; 36181262200; 7402093793; 35326180700 | jhbae@ee.knu.ac.kr; | APPLIED SURFACE SCIENCE | APPL SURF SCI | 0169-4332 | 1873-5584 | 504 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, COATINGS & FILMS;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2020 | 6.707 | 2.4 | 0.69 | 2025-06-25 | 10 | 12 | Molecular misorientation; Surface energy patterning; Organic semiconductor; Meniscus-guided coating | FIELD-EFFECT TRANSISTORS; SINGLE; ALIGNMENT; GROWTH | Meniscus-guided coating; Molecular misorientation; Organic semiconductor; Surface energy patterning | Coatings; Field effect transistors; Flexible electronics; Interfacial energy; Organic semiconductor materials; Contact lines; Device isolation; Electrical characteristic; Field-effect mobilities; Low costs; Mis-orientation; Misorientation angle; Organic thin film transistor (OTFTs); Thin film transistors | English | 2020 | 2020-02-28 | 10.1016/j.apsusc.2019.144362 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article; Proceedings Paper | Development of p-type Bi2-xSbxTe3 thermoelectric materials for power generation application exploiting synergetic effect of Sb alloying and repress process | Bi-Te based alloy compounds are currently the best-performing thermoelectric materials near room temperature. However, with the temperature increase, their conversion efficiency drops dramatically due to intrinsic excitation, thereby limiting their power generation application. In this study, for low-temperature thermoelectric power generation, we develop p-type Bi-Sb-Te alloys with the highest performance at a temperature of similar to 473 K. Here, we note that increasing the amount of Sb can effectively suppress intrinsic excitation, shifting the ZT peak towards higher temperatures. Moreover, we apply the repress process, through which microstructures such as grain boundaries and dislocations are developed in the material, which in turn reduces the thermal conductivity. As a result, a peak ZT of similar to 1.32 at 473 K is achieved for Bi0.3Sb1.7Te3 in the direction parallel to the pressure, which indicates its large application prospect for low-temperature thermoelectric power generation. | Jang, Jeongin; Min, Bok-Ki; Kim, Bong-Seo; Joo, Sung-Jae; Lee, Ho Seong; Lee, Ji Eun | Korea Electrotechnol Res Inst, Energy Convers Res Ctr, Chang Won 51543, South Korea; Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea | 55336555600; 26664804800; 55338437600; 7101656619; 55706810400; 57820644000 | jieunlee@keri.re.kr; | APPLIED SURFACE SCIENCE | APPL SURF SCI | 0169-4332 | 1873-5584 | 508 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, COATINGS & FILMS;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2020 | 6.707 | 2.4 | 1.17 | 2025-06-25 | 25 | 25 | Thermoelectric; Repress; Bandgap broadening; Bi-Sb-Te alloys; Peak shift | ANTISITE DEFECTS; NANOPARTICLES; PERFORMANCE; SB2TE3 | Bandgap broadening; Bi–Sb–Te alloys; Peak shift; Repress; Thermoelectric | Grain boundaries; Tellurium compounds; Temperature; Thermal conductivity; Thermoelectric equipment; Thermoelectric power; Thermoelectricity; Application prospect; Near room temperature; Peak shift; Power generation applications; Repress; Temperature increase; Thermo-Electric materials; Thermoelectric; Antimony alloys | English | 2020 | 2020-04-01 | 10.1016/j.apsusc.2019.145236 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Enhanced thermal conductivity of a polysilazane-coated A-BN/epoxy composite following surface treatment with silane coupling agents | Spherically aggregated boron nitride (BN) is advantageous for improving thermal conductivity. However, it is difficult to process due to its fragility and poor wettability. Herein we report coating boron nitride aggregates with polysilazane (PSZ) and three different silanes, glycidoxypropyltrimethoxysilane (GPTMS), aminopropyltriethoxysilane (APTES), and mercaptopropyltrimethoxysilane (MPTMS), via hydrolysis and condensation. The PSZ coating protected BN from external force, and the silane coatings enhanced interfacial adhesion between the filler and the matrix. An epoxy composite contained the BN surface modified with PSZ and APTES had the highest thermal conductivity of 11.8 W m(-1) K-1 at a filler fraction of 75 wt%. Its thermal conductivity was 62 times higher than that of the neat epoxy. | Wie, Jaehyun; Kim, Myeongjin; Kim, Jooheon | Chung Ang Univ, Sch Chem Engn & Mat Sci, 211 Heukseok Don, Seoul 156756, South Korea; Kyungpook Natl Univ, Dept Hydrogen & Renewable Energy, 80 Daehakro, Daegu 41566, South Korea | 57210645186; 55541419000; 13103271400 | grwie23@naver.com;myeongjinkim@knu.ac.kr;jooheonkim@cau.ac.kr; | APPLIED SURFACE SCIENCE | APPL SURF SCI | 0169-4332 | 1873-5584 | 529 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, COATINGS & FILMS;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2020 | 6.707 | 2.4 | 2.22 | 2025-06-25 | 55 | 57 | Surface modification; Thermal conductivity; Polymer-matrix composites (PMCs) | BORON-NITRIDE NANOSHEETS; MECHANICAL-PROPERTIES; NANOCOMPOSITES; POLYURETHANE; FABRICATION; FIBERS | Polymer-matrix composites (PMCs); Surface modification; Thermal conductivity | Aggregates; Boron nitride; Coatings; Coupling agents; Fillers; III-V semiconductors; Nitrides; Silanes; Surface treatment; Aminopropyltriethoxysilane; Enhanced thermal conductivity; Glycidoxypropyltrimethoxysilane; Hydrolysis and condensation; Interfacial adhesions; Mercaptopropyltrimethoxysilane; Silane coupling agent; Surface-modified; Thermal conductivity | English | 2020 | 2020-11-01 | 10.1016/j.apsusc.2020.147091 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Genetic and pathogenic characteristics of clade 2.3.2.1c H5N1 highly pathogenic avian influenza viruses isolated from poultry outbreaks in Laos during 2015-2018 | Since 2004, there have been multiple outbreaks of H5 highly pathogenic avian influenza (HPAI) viruses in Laos. Here, we isolated H5N1 HPAI viruses from poultry outbreaks in Laos during 2015-2018 and investigated their genetic characteristics and pathogenicity in chickens. Phylogenetic analysis revealed that the isolates belonged to clade 2.3.2.1c and that they differed from previous Laos viruses with respect to genetic composition. In particular, the isolates were divided into two genotypes, each of which had a different NS segments. The results of possible migration analysis suggested a high likelihood that the Laos isolates were introduced from neighbouring countries, particularly Vietnam. The recent Laos isolate, A/Duck/Laos/NL-1504599/2018, had an intravenous pathogenicity index score of 3.0 and showed a 50% chicken lethal dose of 10(2.5) EID50/0.1 ml, indicating high pathogenicity. The isolated viruses exhibited no critical substitution in the markers associated with mammalian adaptation, but possess markers related to neuraminidase inhibitor resistance. These results emphasize the need for ongoing surveillance of circulating influenza virus in South-East Asia, including Laos, to better prepare for and mitigate global spread of H5 HPAI. | Park, Yu-Ri; Lee, Yu-Na; Lee, Dong-Hun; Baek, Yoon-Gi; Si, Young-Jae; Meeduangchanh, Phetlamphone; Theppangna, Watthana; Douangngeun, Bounlom; Kye, Soo-Jeong; Lee, Myoung-Heon; Park, Choi-Kyu; Lee, Youn-Jeong | Anim & Plant Quarantine Agcy, Avian Influenza Res Diagnost Div, 177,Hyeoksin 8 Ro, Gimcheon 39660, South Korea; Kyungpook Natl Univ, Coll Vet Med, Anim Dis Intervent Ctr, Daegu, South Korea; Univ Connecticut, Dept Pathobiol & Vet Sci, Storrs, CT USA; Natl Anim Hlth Lab, Viangchan, Laos | Lee, Dong-hun/H-5082-2019 | 57190841028; 59858247700; 55554985200; 57211667015; 56596215900; 55256352500; 14826003500; 25636725900; 8434166700; 7409119931; 24768064900; 55533095600 | parkck@knu.ac.kr;leeyj700@korea.kr; | TRANSBOUNDARY AND EMERGING DISEASES | TRANSBOUND EMERG DIS | 1865-1674 | 1865-1682 | 67 | 2 | SCIE | INFECTIOUS DISEASES;VETERINARY SCIENCES | 2020 | 5.005 | 2.4 | 0.78 | 2025-06-25 | 7 | 7 | Influenza A virus; Laos; phylogenetic analysis | WILD BIRDS; A VIRUSES; HUMAN INFECTION; GLOBAL SPREAD; HONG-KONG; EMERGENCE; EVOLUTION; CHINA; MUTATIONS; VARIANTS | H5N1; Influenza A virus; Laos; phylogenetic analysis | Animals; Chickens; Disease Outbreaks; Genotype; Influenza A Virus, H5N1 Subtype; Influenza in Birds; Laos; Phylogeny; Poultry; Poultry Diseases; Specific Pathogen-Free Organisms; nonstructural protein 1; nonstructural protein 2; amino acid sequence; animal experiment; animal model; Article; avian influenza (H5N1); chicken; epidemic; gene mutation; genetics; genotype; glycosylation; HA gene; molecular clock; nonhuman; NP gene; PB1 gene; phylogenetic tree; poultry; sequence homology; virus gene; virus identification; virus isolation; virus virulence; animal; avian influenza; bird disease; epidemic; germfree animal; Influenza A virus (H5N1); isolation and purification; Laos; pathogenicity; phylogeny; poultry; veterinary medicine; virology | English | 2020 | 2020-03 | 10.1111/tbed.13430 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Genetic characterization of canine parvovirus type 2c from domestic dogs in Korea | Canine parvovirus type 2 (CPV-2) is an aetiological agent that causes acute haemorrhagic enteritis and fatal myocarditis in dogs. Since CPV-2 first emerged in the late 1970s, its rapid evolution has resulted in three antigenic variants: CPV-2a, CPV-2b and CPV-2c. Here, we report, for the first time in Korea, two cases of CPV-2c infection in two dogs with severe diarrhoea. The complete open reading frame (4,269nt) of CPV-2, encoding both non-structural (NS) and structural (VP) proteins, was sequenced. Based on the amino acid Gln present at residue 426 of the VP2 gene, these strains were typed as CPV-2c, and were named Korea CPV-2c₁ and Korea CPV-2c₂. These strains shared 99.48% reciprocal nucleotide sequence identity and had the highest nucleotide identity (99.77%-99.34%) with Asian CPV strains isolated in China, Italy (found in a dog imported from Thailand), and Vietnam from 2013 to 2017. Phylogenetic analysis based on the non-structural (NS1) and capsid (VP2) genes revealed that Korean CPV-2c strains clustered closely to Asian CPV strains, and separately from strains isolated in Europe, South America and North America. Amino acid changes never reported before were observed in NS1 (Thr70Pro, Cys287Tyr), VP1 (Lys17Arg, Phe33Leu) and VP2 (Gln365His, Ala516Val). Additional observed mutations, including Phe267Tyr, Tyr324Ile and Gln370Arg, have been previously reported in the recent CPV-2c strains with Asian origins. These results suggest that the Korean CPV-2c strains were potentially introduced via neighbouring Asian countries. | Moon, Bo-Youn; Jang, Jiung; Kim, Seong-Hee; Kim, Yeon-Hee; Lee, Hyun-kyoung; So, ByungJae; Park, Choi-Kyu; Lee, Kyoung-Ki | Anim & Plant Quarantine Agcy, Anim Dis Diag Div, Gimcheon, South Korea; Kyungpook Natl Univ, Coll Vet Med, Daegu, South Korea; Kyungpook Natl Univ, Anim Dis Intervent Ctr, Daegu, South Korea | 57209452048; 57215498180; 34769762800; 57203809456; 57202973917; 56366161500; 24768064900; 38163138800 | naturelkk@Korea.kr; | TRANSBOUNDARY AND EMERGING DISEASES | TRANSBOUND EMERG DIS | 1865-1674 | 1865-1682 | 67 | 4 | SCIE | INFECTIOUS DISEASES;VETERINARY SCIENCES | 2020 | 5.005 | 2.4 | 2.09 | 2025-06-25 | 23 | 22 | canine parvovirus 2c; epidemiology; genetic characteristics; South Korea | EVOLUTION; SEQUENCE; EMPHASIS; CAPSIDS; RANGE | canine parvovirus 2c; epidemiology; genetic characteristics; South Korea | Animals; Base Sequence; Capsid Proteins; DNA, Viral; Dog Diseases; Dogs; Open Reading Frames; Parvoviridae Infections; Parvovirus, Canine; Phylogeny; Polymerase Chain Reaction; Republic of Korea; Viral Nonstructural Proteins; Viral Structural Proteins; capsid protein; viral protein; virus DNA; amino acid substitution; apoptosis; Article; autopsy; Canine parvovirus; cell cycle arrest; cytotoxicity; DNA extraction; DNA replication; dog; gene mutation; hemagglutination inhibition test; Korea; molecular epidemiology; nucleotide sequence; open reading frame; phylogeny; polymerase chain reaction; Porcine epidemic diarrhea virus; prevalence; sequence analysis; vaccination; virus replication; animal; Canine parvovirus; dog disease; genetics; parvovirus infection; South Korea; veterinary medicine; virology | English | 2020 | 2020-07 | 10.1111/tbed.13501 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Influence of humidity for preparing sol-gel ZnO layer: Characterization and optimization for optoelectronic device applications | Sol-gel zinc oxide (ZnO) is very useful for constructing various optoelectronic devices including different types of sensors and solar cells at low cost and fast processing time. Here, we adopted a zinc acetate dehydrate, with low processing temperature and suitable for flexible electronics, as a precursor to produce ZnO thin film. Then, we explored the morphological and optical properties of various sol-gel ZnO layers depending on the humidity of the sol-gel process because the humidity affects the morphological and optical characteristics, dramatically changing the performance of optoelectronic devices. As a result, extremely high humidity produced a ZnO layer with rough surface, high dispersive transmittance, and high trap density because rapid hydrolysis does not give atoms enough time to move to thermodynamically-stable sites. On the other hand, extremely low humidity produced a ZnO layer with smooth surface, low dispersive transmittance and oxygen-deficient trap sites owing to insufficient hydrolysis. Therefore, a ZnO layer prepared at humidity of 25% had low surface roughness, low trap density, and desirable transmittance characteristics, achieving the best device performance when applied to organic solar cells. This study will be helpful in determining the optimum processing conditions to obtain optoelectronic devices with the best performance. | Song, Hyojin; Ma, Yoohan; Ko, Dongwook; Jo, Sungjin; Hyun, Dong Choon; Kim, Chang Su; Oh, Hyeon-Ju; Kim, Jongbok | Kumoh Natl Inst Technol, Dept Mat Sci & Engn, Gumi 39177, Gyeongbuk, South Korea; Kyungpook Natl Univ, Sch Architectural Civil Environm & Energy Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Dept Polymer Sci & Engn, Daegu 41566, South Korea; KIMS, Dept Adv Funct Thin Films, Chang Won 51508, South Korea; Kumoh Natl Inst Technol, Adv Mat Res Ctr, Gumi 39177, Gyeongbuk, South Korea | Oh, Hyeon-Ju/ABH-2809-2020 | 57214778527; 57215733716; 24479440600; 7101724027; 15834575400; 57201346735; 56362812200; 15762365000 | smju26@kumoh.ac.kr;jbkim@kumoh.ac.kr; | APPLIED SURFACE SCIENCE | APPL SURF SCI | 0169-4332 | 1873-5584 | 512 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, COATINGS & FILMS;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2020 | 6.707 | 2.4 | 1.03 | 2025-06-25 | 22 | 22 | Sol-gel method; Zinc oxide; Thin film; Humidity; Organic solar cells | OPTICAL-PROPERTIES; THIN-FILMS; CONDUCTIVE FILMS; BUFFER LAYER; BAND-GAP; CELLS; POLYMER; DEPOSITION; EFFICIENCY; TRANSPORT | Humidity; Organic solar cells; Sol-gel method; Thin film; Zinc oxide | Atmospheric humidity; Flexible electronics; Hydrolysis; II-VI semiconductors; Optical properties; Optoelectronic devices; Organic solar cells; Surface roughness; Thin films; Zinc oxide; Extremely low humidities; Fast processing time; Influence of humidity; Low processing temperature; Low surface roughness; Optical characteristics; Optimum processing conditions; Thermodynamically stable; Sol-gel process | English | 2020 | 2020-05-15 | 10.1016/j.apsusc.2020.145660 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Lanthanum-substituted bimetallic magnetic materials assembled carboxylate-rich graphene oxide nanohybrids as highly efficient adsorbent for perfluorooctanoic acid adsorption from aqueous solutions | Perfluorooctanoic acid (PFOA) is a persistent organic contaminant, and it has recently been recognized as a contaminant in aquatic environments worldwide because of its effects on human health. Herein, we report the synthesis of graphene oxide decorated with highly stable lanthanum-substituted manganese ferrites (LMF) at various concentrations (LMFx%@GO). After the substitution of lanthanum on MF, the surface charge density and the crystalline nature were altered significantly, as supported by the zeta potential, transmission electron and scanning electron microscopy images, and powder X-ray diffraction patterns. Among the concentrations of x = 25, 50, and 75% wt./wt., LMF75%@GO exhibited the highest PFOA removal densities. Electrostatic interaction and hydrogen bonding played vital roles in the adsorption of PFOA, as evidenced by various spectro-analytical techniques, including FTIR, XPS, and TEM-EDX. Several conditions such as contact time, pH, coexisting substances, and quantities of LMF nanoparticles were evaluated to provide information about the PFOA removal process. Moreover, the presence of coexisting pollutants such as anions, cations, and other organic compounds had no remarkable influence on PFOA adsorption using LMF75%@GO nanohybrids. The results suggest that the prepared LMF75%@GO nanohybrids may be a promising candidate for the removal of PFOA from an aqueous environment. | Elanchezhiyan, S. S. D.; Prabhu, Subbaiah Muthu; Kim, Yejin; Park, Chang Min | Kyungpook Natl Univ, Dept Environm Engn, 80 Daehak Ro, Daegu 41566, South Korea | ; Park, Chang Min/CAA-8506-2022; Muthu Prabhu, Subbaiah/AFN-4547-2022 | 54894383700; 7101753878; 59052467200; 57209588953 | prabhu86@knu.ac.kr;rysa12@naver.com;cmpark@knu.ac.kr; | APPLIED SURFACE SCIENCE | APPL SURF SCI | 0169-4332 | 1873-5584 | 509 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, COATINGS & FILMS;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2020 | 6.707 | 2.4 | 2.3 | 2025-06-25 | 36 | 43 | LMFx%@GO; Nanohybrids; PFOA; Magnetic separation | PERFLUORINATED COMPOUNDS; ARSENIC REMOVAL; SULFONATE PFOS; BEHAVIOR; MECHANISM; NANOCOMPOSITES; REMEDIATION; POLLUTANTS; GRAPHITE; BIOMASS | LMFx%@GO; Magnetic separation; Nanohybrids; PFOA | Adsorption; Carboxylation; Hydrogen bonds; Lanthanum; Magnetic materials; Magnetic separation; Nanostructured materials; Scanning electron microscopy; LMFx%@GO; Nanohybrids; Perfluorooctanoic acid; Persistent organic contaminants; PFOA; Powder X ray diffraction; Scanning electron microscopy image; Transmission electron; Graphene | English | 2020 | 2020-04-15 | 10.1016/j.apsusc.2019.144716 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Magnetically responsive SnFe2O4/g-C3N4 hybrid photocatalysts with remarkable visible-light-induced performance for degradation of environmentally hazardous substances and sustainable hydrogen production | SnFe2O4/g-C3N4 (SFO/CN) hybrids were fabricated as efficient magnetically recoverable and visible-light-responsive photocatalysts via a facile in situ precipitation method. The photocatalytic activities of the fabricated SFO/CN hybrids were assessed on the basis of their ability to degrade environmentally hazardous dyes (Rhodamine B, methylene blue, and methyl orange) and to produce H-2 under visible light. The SFO/CN hybrids displayed outstanding performance toward both the elimination of dye pollutants and the production of H-2, demonstrating several-fold enhancements compared with the performances of the hybrids' CN and SFO components and a commercial P25 catalyst. This enhancement in the photocatalytic performance of the SFO/CN hybrids predominantly corresponds to the synergetic effect between CN and SFO that improves not only their specific surface area and optical absorption capability but also the separation efficiency of photoexcited electrons and holes. Total organic carbon analysis further demonstrated the efficient mineralization of model dye molecules over the SFO/CN hybrids. In addition, the SFO/CN hybrids could be easily recovered magnetically and exhibited notable recyclability without obvious loss of activity after five consecutive photocatalytic test cycles, demonstrating their strong potential for use in practical applications, especially pollutant elimination and sustainable H-2 production. | Jo, Wan-Kuen; Moru, Satyanarayana; Tonda, Surendar | Kyungpook Natl Univ, Dept Environm Engn, 80 Daehak Ro, Daegu 41566, South Korea; Iowa State Univ, Dept Elect & Comp Engn, Coover Hall,Osborn Dr, Ames, IA 50011 USA | ; Moru, Satyanarayana/AAF-3189-2021; Jo, Wan/AAO-5329-2020; MORU, SATYANARAYANA/AAF-3189-2021; Tonda, Surendar/AAO-3358-2020 | 7103322277; 58562229700; 56114866900 | surendart@knu.ac.kr; | APPLIED SURFACE SCIENCE | APPL SURF SCI | 0169-4332 | 1873-5584 | 506 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, COATINGS & FILMS;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2020 | 6.707 | 2.4 | 2.15 | 2025-06-25 | 36 | 37 | g-C3N4; SnFe2O4; Magnetic separation; Pollutant degradation; Hydrogen production | GRAPHITIC CARBON NITRIDE; Z-SCHEME PHOTOCATALYST; IN-SITU FABRICATION; CO2 REDUCTION; ELECTRONIC-STRUCTURE; HETEROJUNCTION; G-C3N4; TIO2; TEMPERATURE; SURFACE | g-C<sub>3</sub>N<sub>4</sub> ; Hydrogen production; Magnetic separation; Pollutant degradation; SnFe<sub>2</sub>O<sub>4</sub> | Aromatic compounds; Azo dyes; Dyes; Hazards; Iron compounds; Light; Light absorption; Magnetic separation; Organic carbon; Photocatalytic activity; Pollution; Precipitation (chemical); Tin compounds; Absorption capability; g-C3N4; Hybrid photocatalysts; Photocatalytic performance; Photoexcited electrons; Pollutant degradation; SnFe2O4; Visible-light responsive photocatalysts; Hydrogen production | English | 2020 | 2020-03-15 | 10.1016/j.apsusc.2019.144939 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Mechanistic performance of polyaniline-substituted hexagonal boron nitride composite as a highly efficient adsorbent for the removal of phosphate, nitrate, and hexavalent chromium ions from an aqueous environment | In this study, we synthesized a novel 2D heterostructured composite material by substituting hexagonal boron nitride (h-BN) with polyaniline (Pani), h-BN@x%Pani, via an in situ chemical oxidative method. The h-BN@x% Pani (x = 1, 2, and 5% of aniline) can remove phosphate, nitrate, and hexavalent chromium (Cr(VI)) ions from aqueous solution, and h-BN is generally used as a supporting material because of its good stability and high specific surface area (263.68 m(2)/g). The physicochemical properties of the h-BN@x%Pani hybrid composite before and after adsorption of the aforementioned contaminants were investigated using various analytical techniques. After substitution of Pani onto h-BN, the surface charge density of the as-synthesized adsorbent was greatly improved, which is in good agreement with zeta-potential measurements. The adsorption mechanism of phosphate, nitrate, and Cr(VI) ions onto h-BN@x%Pani hybrid composite was mainly governed by electrostatic attraction followed by surface complexation and ion-exchange. Furthermore, the h-BN@x%Pani composite was regenerated with 0.1 M NaOH solution as a desorbing reagent without any significant loss of adsorption efficiency for five consecutive cycles. Because of their good removal behavior for phosphate, nitrate, and Cr(VI) ions, the synthesized h-BN@x%Pani hybrid composites are expected to become potential candidates in practical applications for water and wastewater remediation. | Karthikeyan, Perumal; Elanchezhiyan, S. S. D.; Preethi, Jayaram; Meenakshi, Sankaran; Park, Chang Min | Gandhigram Rural Inst Deemed Be Univ, Dept Chem, Gandhigram 624302, Tamil Nadu, India; Kyungpook Natl Univ, Dept Environm Engn, 80 Daehak Ro, Daegu 41566, South Korea | Meenakshi, Sankaran/AAF-5748-2020; Karthikeyan, Perumal/T-6719-2019; Park, Chang Min/CAA-8506-2022 | 57207499412; 54894383700; 58909614400; 58099005900; 57209588953 | sankaranmeenakshi2014@gmail.com;cmpark@knu.ac.kr; | APPLIED SURFACE SCIENCE | APPL SURF SCI | 0169-4332 | 1873-5584 | 511 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, COATINGS & FILMS;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2020 | 6.707 | 2.4 | 5.11 | 2025-06-25 | 88 | 94 | Adsorption; Isotherm; Toxic anions; h-BN; Polyaniline | ADSORPTION; CR(VI); NANOSHEETS; CARBON; NANOPARTICLES; CHITOSAN; AMMONIA | Adsorption; h-BN; Isotherm; Polyaniline; Toxic anions | Adsorption; Aniline; Boron nitride; Chemicals removal (water treatment); III-V semiconductors; Ion exchange; Isotherms; Metal ions; Nitrates; Nitrides; Nitrogen removal; Physicochemical properties; Polyaniline; Sodium hydroxide; Adsorption efficiency; Electrostatic attractions; h-BN; Hexagonal boron nitride; Hexagonal boron nitride (h-BN); Hexavalent chromium ions; High specific surface area; Zeta potential measurements; Chromium compounds | English | 2020 | 2020-05-01 | 10.1016/j.apsusc.2020.145543 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Piezoelectric energy conversion by lead-free perovskite BaTiO3 nanotube arrays fabricated using electrochemical anodization | Synthesis approaches for diverse morphologies of 1D piezoelectric ceramic nanomaterials are still challenging to investigate nanoscale properties and applications. In this work, we demonstrated a vertically grown barium titanate (BaTiO3; BT) nanotube (BT NT) arrays fabricated using optimized electrochemical anodization and hydrothermal reaction. The centimeter-scale synthesized BT NT arrays with a high aspect ratio of up to 300 showed the complete perovskite crystal structure and the notable piezoelectric coefficient of similar to 180 pm.V-1. A single BT NT-based piezoelectric device was fabricated on a flexible plastic substrate using a highly controlled focused ion beam-assisted method. The single BT NT device produced a piezoelectric voltage of similar to 150 mV and a current of similar to 3 nA when the NT was mechanically stimulated by bending and releasing, which are higher than previously reported values for 1D piezoelectric nanoscale materials. Finally, a flexible piezoelectric energy harvester (f-PEH) was achieved using vertically grown BT NT arrays with an elastomer as a vertically aligned nanocomposite; its generated maximum open-circuit voltage and short-circuit current were similar to 1.0 V and similar to 20 nA, respectively. The approach in this study can propose the vision for more advanced 1D piezoceramic nanomaterials and future piezoelectric nanodevices. | Jeong, Chang Kyu; Lee, Jae Hoon; Hyeon, Dong Yeol; Kim, Yeon-Gyu; Kim, Seoha; Baek, Changyeon; Lee, Gyoung-Ja; Lee, Min-Ku; Park, Jin-Ju; Park, Kwi-Il | Jeonbuk Natl Univ, Div Adv Mat Engn, 567 Baekje Daero, Jeonju 54896, Jeonbuk, South Korea; Jeonbuk Natl Univ, Hydrogen & Fuel Cell Res Ctr, 567 Baekje Daero, Jeonju 54896, Jeonbuk, South Korea; Kyungpook Natl Univ, Sch Mat Sci & Engn, 80 Daehak Ro, Daegu 41566, South Korea; Samsung Electromech Co, Components Solut Biz Unit, 150 Maeyeong Ro, Suwon 16674, Gyeonggi, South Korea; Korea Atom Energy Res Inst, Sensor Syst Res Team, 111 Daedeok Daero,989 Beon Gil, Daejeon 34057, South Korea | Hyeon, Dong Yeol/HNR-5711-2023; Jeong, Chang Kyu/ADT-8127-2022; Park, Kwiil/LKN-9445-2024; Kim, So-Young/JFS-7698-2023 | 55961876600; 59830439400; 57209099464; 57196173366; 57212495287; 57095549400; 8588965200; 59302175900; 24399310900; 35280874200 | kipark@knu.ac.kr; | APPLIED SURFACE SCIENCE | APPL SURF SCI | 0169-4332 | 1873-5584 | 512 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, COATINGS & FILMS;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2020 | 6.707 | 2.4 | 1.7 | 2025-06-25 | 32 | 33 | Piezoelectric; BaTiO3; Nanotube arrays; Energy harvesting; Nanogenerator; Flexible electronics | NANOCOMPOSITE GENERATOR; NANOWIRE ARRAY; LARGE-AREA; NANOGENERATOR; PERFORMANCE; PARTICLES; NANOPARTICLES; TRANSPARENT | BaTiO<sub>3</sub> ; Energy harvesting; Flexible electronics; Nanogenerator; Nanotube arrays; Piezoelectric | Aspect ratio; Barium titanate; Crystal structure; Energy harvesting; Fabrication; Flexible electronics; Ion beams; Nanostructured materials; Nanotubes; Open circuit voltage; Perovskite; Piezoelectric ceramics; Piezoelectric devices; BaTiO3; Electro-chemical anodization; Nanogenerator; Nanotube arrays; Perovskite crystal structure; Piezoelectric; Piezoelectric energy conversions; Piezoelectric energy harvesters; Piezoelectricity | English | 2020 | 2020-05-15 | 10.1016/j.apsusc.2019.144784 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Piezoelectricity of picosecond laser-synthesized perovskite BaTiO3 nanoparticles | Flexible energy harvesters based on piezoelectric nanomaterials have attracted great attention because they enable a self-powered system that converts electric energy from ambient energy resources. To achieve perovskite-structured piezoelectric nanopowders, most studies have utilized multi-step chemical-based hydrothermal reaction with repeat purification processes, which results in time-consuming production, low-yield production, and the inevitable existence of second phase. As an alternative that addresses the drawbacks of previous synthesis methods, the ultrafast laser processing based on cold ablation is highly promising for nanomaterial synthesis. In this work, we investigated the feasibility of synthesizing BaTiO3 nanoparticles by the picosecond laser ablation of a bulk BaTiO3 target in an ethanol solvent. The picosecond laser-synthesized BaTiO3 nanoparticles have a spherical shape with a size of similar to 300 nm and typical perovskite crystallinity with tetragonal phase. To investigate the piezoelectric response from BaTiO3 nanoparticles, we used a piezoresponse force microscope and confirmed the piezoelectric charge constant of similar to 130 pm.V-1. The results indicate the viability of synthesizing piezoelectric ceramic nanoparticles by the laser ablation of a bulk target in a liquid environment. | Choi, Insung; Lee, Su-Jin; Kim, Jong Chan; Kim, Yeon-gyu; Hyeon, Dong Yeol; Hong, Kyong-Soo; Suh, Jeong; Shin, Dongsig; Jeong, Hu Young; Park, Kwi-Il | Korea Inst Machinery & Mat, Laser Ind Technol Res Grp, 48 Mieumsandan 5 Ro 41beon Gil, Busan 46744, South Korea; Ulsan Natl Inst Sci & Technol, Dept Mat Sci & Engn, 50 UNIST Gil, Ulsan 44919, South Korea; Kyungpook Natl Univ, Sch Mat Sci & Engn, 80 Daehak Ro, Daegu 41566, South Korea; Korea Basic Sci Inst, Busan Ctr, 30 Gwahaksandan 1 Ro 60beon Gil, Busan 46742, South Korea; Ulsan Natl Inst Sci & Technol UNIST, UCRF, 50 UNIST Gil, Ulsan 44919, South Korea | Hyeon, Dong Yeol/HNR-5711-2023; Jeong, Hu/H-4413-2016; Kim, Yong-Tae/HQZ-0240-2023; Kim, So-Young/JFS-7698-2023; Park, Kwiil/LKN-9445-2024 | 7401471561; 56301553400; 57883804900; 57196173366; 57209099464; 8930143200; 35254626400; 10939002100; 56463365400; 35280874200 | ichoi@kimm.re.kr;kipark@knu.ac.kr; | APPLIED SURFACE SCIENCE | APPL SURF SCI | 0169-4332 | 1873-5584 | 511 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, COATINGS & FILMS;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2020 | 6.707 | 2.4 | 1.04 | 2025-06-25 | 19 | 22 | Picosecond laser; Laser ablation in liquid; BaTiO3 nanoparticles; Piezoelectric | THIN-FILM NANOGENERATOR; NANOCOMPOSITE GENERATOR; LARGE-AREA; ABLATION; PARTICLES; NANOWIRES; TRANSPARENT; TITANIUM | BaTiO<sub>3</sub> nanoparticles; Laser ablation in liquid; Picosecond laser; Piezoelectric | Ablation; Barium titanate; Crystallinity; Crystallography; Energy resources; Laser ablation; Nanoparticles; Nanostructured materials; Organic solvents; Perovskite; Picosecond lasers; Piezoelectric ceramics; Piezoelectricity; BaTiO3 nanoparticles; Hydrothermal reaction; Laser ablation in liquid; Piezo-response force microscopes; Piezoelectric; Piezoelectric charge constant; Piezoelectric response; Ultrafast laser processing; Synthesis (chemical) | English | 2020 | 2020-05-01 | 10.1016/j.apsusc.2020.145614 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Probe-based real-time reverse transcription loop-mediated isothermal amplification (RRT-LAMP) assay for rapid and specific detection of foot-and-mouth disease virus | Rapid and specific detection of foot-and-mouth disease virus (FMDV) is a key factor for promoting prompt control of FMD outbreaks. In this study, a real-time reverse transcription loop-mediated isothermal amplification (RRT-LAMP) assay with high sensitivity, rapidity and reliability was developed using a targeted gene-specific assimilating probe for real-time detection of seven FMDV serotypes. Positive assay signals were generated within 15 min for the lowest concentration of a standard RNA sample at 62 degrees C; this was substantially faster than that achieved by the OIE (World Organisation for Animal Health)-recommended real-time quantitative reverse transcription polymerase chain reaction (qRT-PCR) assay. The new assay specifically amplified the3Dgene of all seven FMDV serotypes and did not amplify other viral nucleic acids. The detection limit of the assay was 10(2) copies/mu l which is comparable to that achieved by qRT-PCR. Furthermore, using clinical samples, the results of the RRT-LAMP assay were largely in agreement with those from the qRT-PCR assay with a kappa value (95% confidence interval [CI]) of 0.94 (0.86-1.02). The established RRT-LAMP assay that features assimilating probes is an advanced molecular diagnostic tool that is easily applicable to a wide range of circumstances and has high potential for use as an on-site diagnostic assay for rapid, specific, and reliable detection of FMDVs in clinical samples. | Lim, Da-Rae; Kim, Hye-Ryung; Chae, Ha-Gyeong; Ku, Bok-Kyung; Nah, Jin-Ju; Ryoo, Soyoon; Wee, Sung-Hwan; Lee, Changhee; Lyoo, Young S.; Park, Choi-Kyu | Kyungpook Natl Univ, Coll Vet Med, Daegu 41566, South Korea; Kyungpook Natl Univ, Anim Dis Intervent Ctr, Daegu 41566, South Korea; Anim & Plant Quarantine Agcy, Gimcheon, South Korea; Kyungpook Natl Univ, Sch Life Sci, Anim Virol Lab, Daegu, South Korea; Konkuk Univ, Coll Vet Med, Seoul, South Korea | 57195776777; 57195772612; 57202787553; 9745131200; 7006536134; 56808956200; 7005317216; 55700560700; 35501431200; 24768064900 | parkck@knu.ac.kr; | TRANSBOUNDARY AND EMERGING DISEASES | TRANSBOUND EMERG DIS | 1865-1674 | 1865-1682 | 67 | 6 | SCIE | INFECTIOUS DISEASES;VETERINARY SCIENCES | 2020 | 5.005 | 2.4 | 1.04 | 2025-06-25 | 12 | 12 | assimilating probe; foot-and-mouth disease virus; real-time RT-LAMP | DIAGNOSIS; DIFFERENTIATION; GUIDELINES; SEROTYPES | assimilating probe; foot-and-mouth disease virus; real-time RT-LAMP | Animals; Foot-and-Mouth Disease; Foot-and-Mouth Disease Virus; Molecular Diagnostic Techniques; Nucleic Acid Amplification Techniques; Real-Time Polymerase Chain Reaction; Reproducibility of Results; Reverse Transcriptase Polymerase Chain Reaction; Sensitivity and Specificity; 6 carboxyfluorescein; animal cell; animal experiment; animal tissue; Article; BHK-21 cell line; Bovine viral diarrhea virus 1; Classical swine fever virus; cloning vector; controlled study; diagnostic test accuracy study; fluorescence; foot and mouth disease; Foot and mouth disease virus; gene amplification; gene probe; gene sequence; limit of detection; MDBK cell line; measurement accuracy; measurement precision; measurement repeatability; microorganism detection; molecular diagnosis; nonhuman; PK-15 cell line; Porcine reproductive and respiratory syndrome virus; process optimization; real time reverse transcription loop mediated isothermal amplification; reliability; RNA extraction; sensitivity and specificity; serotype; virus detection; animal; foot and mouth disease; isolation and purification; nucleic acid amplification; real time polymerase chain reaction; reproducibility; reverse transcription polymerase chain reaction; veterinary medicine | English | 2020 | 2020-11 | 10.1111/tbed.13669 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article; Proceedings Paper | Reversible polymer networks based on the dynamic hindered urea bond for scratch healing in automotive clearcoats | A series of dynamic polyacrylate urethane urea networks containing hindered urea (HU) groups (C-HU-ethylene glycol, C-HU-EG; C-HU-tetra(ethylene glycol), C-HU-TEG; C-HU-poly(ethylene glycol), C-HU-PEG) were successfully synthesized for use in automotive clearcoats. The material properties of the clearcoats were controlled using different HU adducts and by adjusting their contents in the polymer networks. The indentation hardness (H-IT), modulus (E-IT), thermal stability (T-d), and glass-transition temperature (T-g) of the polymer networks were characterized by nano-indentation tests, thermogravimetric analysis, dynamic mechanical analysis, and differential scanning calorimetry, respectively. The scratch-resistance and healing performances of the polymer networks were evaluated quantitatively using a micro-scratch tester in conjunction with optical microscopy. The results reveal that the C-HU-TEG polymer networks not only exhibited physical properties most similar to those of the commercial clearcoat (T30) but also demonstrated the best self-healing performance. The balanced chemical structure of the HU-TEG adduct between the flexible unit (TEG) and the rigid unit (IPDI, urea, and urethane bond) played an important role of increasing scratch-healing performance while maintaining the clearcoat material properties. | Kim, Gi Young; Sung, Sujin; Kim, Minsoo P.; Kim, Soon Cheon; Lee, Sang-Ho; Park, Young Il; Noh, Seung Man; Cheong, In Woo; Kim, Jin Chul | Korea Res Inst Chem Technol, Res Ctr Green Fine Chem, Ulsan 44412, South Korea; Kyungpook Natl Univ, Grad Sch Adv Integrat Sci & Technol, Sch Appl Chem Engn, Daegu 41566, South Korea; Ulsan Natl Inst Technol UNIST, Sch Energy & Chem Engn, Ulsan 44919, South Korea | Kim, Kyoung-Sook/A-7768-2017; Lee, Sang-Ho/T-3699-2019 | 57210997221; 57204630884; 55153668300; 57196401694; 58743026900; 55494480300; 36941192100; 7006733373; 56805502600 | inwoo@knu.ac.kr;jckim81@krict.re.kr; | APPLIED SURFACE SCIENCE | APPL SURF SCI | 0169-4332 | 1873-5584 | 505 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, COATINGS & FILMS;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2020 | 6.707 | 2.4 | 1.85 | 2025-06-25 | 35 | 37 | Intrinsic self-healing; Dynamic hindered urea bond; Dynamic polymer network; Automotive clearcoat; Scratch resistance; Scratch healing | GLASS-TRANSITION TEMPERATURE; COATINGS; BEHAVIOR | Automotive clearcoat; Dynamic hindered urea bond; Dynamic polymer network; Intrinsic self-healing; Scratch healing; Scratch resistance | Differential scanning calorimetry; Dynamics; Esters; Ethylene; Ethylene glycol; Glass transition; Indentation; Metabolism; Polyethylene glycols; Polyols; Rigid structures; Self-healing materials; Thermogravimetric analysis; Urea; Clearcoat; Flexible units; Indentation hardness; Nanoindentation tests; Polymer networks; Reversible polymers; Scratch healing; Self-healing; Scratch resistance | English | 2020 | 2020-03-01 | 10.1016/j.apsusc.2019.144546 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Synthesis and characterization of novel magnetic Zr-MnFe2O4@rGO nanohybrid for efficient removal of PFOA and PFOS from aqueous solutions | The emerging contaminants such as perfluorinated chemicals (PFCs) have been observed of increasing concerns throughout the world due to their detrimental effects for human health and other creatures in nature. Herein, zirconium imprinted magnetic manganese ferrite assembled reduced graphene oxide (rGO) nanohybrids were used to remove perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS). The effective intercalation of magnetic Zr-MnFe2O4 into rGO was confirmed from FTIR, PXRD, VSM, and Raman spectra. Surface morphologies and particle sizes of as-synthesized adsorbents were determined using FE-SEM, HR-TEM, EDX, and BET analysis. Several factors including contact time, pH, initial concentrations of PFOA and PFOS, type of coexisting anions, and presence of other organic compounds were optimized to determine the maximum density of the prepared Zr-MnFe2O4@rGO nanohybrids. The adsorption of PFOA and PFOS on the Zr-MnFe2O4@rGO nanohybrids was governed mainly by electrostatic attraction followed by hydrophobic interaction. In particular, the treated adsorbents could be easily separated by employing external magnetic force, and it could be regenerated and reused up to four cycles without any significant loss. The Zr-MnFe2O4@rGO nanohybrids are potential candidates for the removal of PFOA and PFOS from aqueous environment. | Elanchezhiyan, S. SD.; Prabhu, Subbaiah Muthu; Han, Jonghun; Kim, Young Mo; Yoon, Yeomin; Park, Chang Min | Kyungpook Natl Univ, Dept Environm Engn, 80 Daehak Ro, Daegu 41566, South Korea; Alagappa Univ, Dept Ind Chem, Karaikkudi 630003, Tamil Nadu, India; Korea Army Acad Yeongcheon, Dept Civil & Environm Engn, 495 Hogook Ro, Yeongcheon 38900, Gyeongbuk, South Korea; Hanyang Univ, Dept Civil & Environm Engn, Seoul 04763, South Korea; Univ South Carolina, Dept Civil & Environm Engn, 300 Main St, Columbia, SC 29208 USA | ; Subbaiah, Muthu/E-3347-2016; Yoon, Yeomin/KDP-2253-2024; Kim, Young Mo/HKF-1486-2023; Park, Chang Min/CAA-8506-2022 | 54894383700; 7101753878; 59803784200; 57202258703; 7402126688; 57209588953 | chezhiyandasarathan@gmail.com;drsmprabhu@gmail.com;phoenixvov@nate.com;youngmo@hanyang.ac.kr;yoony@cec.sc.edu;cmpark@knu.ac.kr; | APPLIED SURFACE SCIENCE | APPL SURF SCI | 0169-4332 | 1873-5584 | 528 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, COATINGS & FILMS;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2020 | 6.707 | 2.4 | 2.37 | 2025-06-25 | 54 | 57 | PFOA; PFOS; Magnetic adsorbent; rGO; Adsorption | PERFLUOROOCTANE SULFONATE PFOS; PERFLUORINATED COMPOUNDS; ADSORPTION BEHAVIOR; HYBRID COMPOSITE; WATER; NANOCOMPOSITES; CONTAMINANTS; MECHANISMS; POLLUTANTS; ADSORBENT | Adsorption; Magnetic adsorbent; PFOA; PFOS; rGO | Adsorption; Fourier transform infrared spectroscopy; Graphene; Hydrophobicity; Iron compounds; Magnetism; Manganese compounds; Particle size analysis; Reduced Graphene Oxide; Thallium compounds; Electrostatic attractions; Hydrophobic interactions; Initial concentration; Perfluorinated chemicals; Perfluorooctane sulfonic acids; Perfluorooctanoic acid; Reduced graphene oxides (RGO); Synthesis and characterizations; Zirconium compounds | English | 2020 | 2020-10-30 | 10.1016/j.apsusc.2020.146579 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Theoretical insight into effect of cation-anion pairs on CO2 reduction on bismuth electrocatalysts | This study presents theoretical insight into the mechanism of the CO2 reduction reaction (CO2RR) to formic acid (HCOOH) on Bi (012) surfaces in the presence of alkali metal cations (M+: Cs+, K+, and Li+) and/or halide anions (X-: Cl-, Br-, and I-) using density functional theory (DFT). The adsorption energy (F-ads) and work function (W-f) of the anions increases with decreasing anion size (i.e., Cl- > Br- > I-). On the other hand, the larger the cation size is, the higher is the E-ads (i.e., Li+ < K+ < Cs+) but the lower is the W-f (i.e., Cs+ < K+ < Li+). In the presence of the cation-anion pairs (M+/X-), E-ads of the pairs on hydrated Bi (Bi-2H) becomes more negative than that in the cases of anions or cations alone, particularly when the ionic radius of the paired cation and anion do not differ significantly. Such a synergistic effect of the mixed ions is also observed for the work function values. In the case of anions alone, CO2 molecules prefer to coordinate directly with hydrated Bi atoms via the oxygen bidentate mode; in the case of cations alone, CO2 molecules directly bind to the cations via the oxygen monodentate mode, rather than the hydrated Bi atoms. Between two possible CO2RR pathways involving *OCHO and *COOH intermediates on Bi-2H pre-adsorbed with M+/X-, the former pathway requires less energy for all M+/X- pairs. In addition, cascaded reaction profiles from CO2* to HCOOH are obtained with Cs+/Cl- and K+/Cl- pairs in the former. This indicates that once CO2 is adsorbed, the following reactions proceed spontaneously on Bi-2H with Cs+/Cl- or K+/Cl- pairs. This study thus shed light on the positive effects of supporting electrolytes (e.g., CsCl and KCl) on catalytic CO2RR. | Yoon, Sun Hee; Piao, Guangxia; Park, Hyunwoong; Elbashir, Nimir O.; Han, Dong Suk | Texas A&M Univ Qatar, Petr Engn Program, Doha 23874, Qatar; Kyungpook Natl Univ, Sch Energy Engn, Daegu 41566, South Korea; Texas A&M Univ Qatar, Petr Engn & Chem Engn Programs, Doha 23874, Qatar; Texas A&M Univ, TEES Gas & Fuels Res Ctr, College Stn, TX 77843 USA; Qatar Univ, Ctr Adv Mat CAM, Doha 2713, Qatar | Han, Dong SuK/AAX-9333-2021; Park, Hyunwoong/A-1247-2012 | 55516458500; 57193277010; 7601565583; 6602695447; 36139213900 | hwp@knu.ac.kr;dhan@qu.edu.qa; | APPLIED SURFACE SCIENCE | APPL SURF SCI | 0169-4332 | 1873-5584 | 532 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, COATINGS & FILMS;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2020 | 6.707 | 2.4 | 1.04 | 2025-06-25 | 20 | 19 | CO2 reduction; Single ion adsorption; Mixed ion adsorption; Adsorption energy; Work function; Reaction pathway | HYDROGEN-PRODUCTION; CATALYTIC-ACTIVITY; OXYGEN REDUCTION; CARBON-DIOXIDE; WIRE ARRAYS; COPPER; ELECTROREDUCTION; ADSORPTION; EFFICIENCY; FORMATE | Adsorption energy; CO<sub>2</sub> reduction; Mixed ion adsorption; Reaction pathway; Single ion adsorption; Work function | Alkali halides; Bismuth; Carbon dioxide; Cesium compounds; Density functional theory; Electrocatalysts; Formic acid; Hydration; Molecules; Negative ions; Oxygen; Positive ions; Potassium compounds; Work function; Adsorption energies; Alkali metal cations; CO2 reduction; Function values; Halide anions; Reaction profile; Supporting electrolyte; Synergistic effect; Chlorine compounds | English | 2020 | 2020-12-01 | 10.1016/j.apsusc.2020.147459 | 바로가기 | 바로가기 | 바로가기 | 바로가기 |
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