Bicarbonate-enhanced generation of hydroxyl radical by visible light-induced photocatalysis of H2O2 over WO3: Alteration of electron transfer mechanism
DC Field | Value | Language |
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dc.contributor.author | Choi, Jaemin | - |
dc.contributor.author | Kim, Hak-Hyeon | - |
dc.contributor.author | Lee, Ki-Myeong | - |
dc.contributor.author | Chen, Na | - |
dc.contributor.author | Kim, Min Sik | - |
dc.contributor.author | Seo, Jiwon | - |
dc.contributor.author | Lee, Donghyun | - |
dc.contributor.author | Cho, Haein | - |
dc.contributor.author | Kim, Hyoung-il | - |
dc.contributor.author | Lee, Jaesang | - |
dc.contributor.author | Lee, Hongshin | - |
dc.contributor.author | Lee, Changha | - |
dc.date.accessioned | 2022-08-14T06:40:53Z | - |
dc.date.available | 2022-08-14T06:40:53Z | - |
dc.date.created | 2022-08-12 | - |
dc.date.issued | 2022-03-15 | - |
dc.identifier.issn | 1385-8947 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/143122 | - |
dc.description.abstract | The generation of hydroxyl radical ((OH)-O-center dot) by visible light-illuminated tungsten oxide (WO3) was found to be significantly improved in the presence of hydrogen peroxide (H2O2) and bicarbonate ion (HCO3-). A ternary system of h nu/WO3/H2O2/HCO3- showed synergistic enhancement in oxidation of benzoic acid (BA, a (OH)-O-center dot probe compound) into hydroxybenzoic acids (HBAs), exhibiting even less consumption of H2O2 than h nu/WO3/H2O2. Analyses of HBAs from BA oxidation (three HBA isomers and O-18-labelled HBA from (H2O2)-O-18) suggested that h nu/WO3/H2O2/HCO3-, contrary to h nu/WO3/H2O2, generated (OH)-O-center dot mainly via one-electron transfer from the conduction band of WO3 to H2O2. The dominant one-electron reduction of H2O2 over HCO3--treated WO3 was further evidenced by Koutecky-Levich plots obtained with a rotating disk electrode setup. Based on different experiments using electron paramagnetic resonance spectroscopy, radical scavengers and probes, (photo-)electrochemical measurements, and density functional theory calculations, the mechanisms underlying the enhanced generation of (OH)-O-center dot by h nu/WO3/H2O2/HCO3- were discussed. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ELSEVIER SCIENCE SA | - |
dc.subject | BENZOIC-ACID | - |
dc.subject | PHOTOASSISTED DEGRADATION | - |
dc.subject | DYE POLLUTANTS | - |
dc.subject | WATER | - |
dc.subject | OXIDATION | - |
dc.subject | OXYGEN | - |
dc.subject | RADIOLYSIS | - |
dc.subject | PHOTOLYSIS | - |
dc.subject | HYDROGEN | - |
dc.title | Bicarbonate-enhanced generation of hydroxyl radical by visible light-induced photocatalysis of H2O2 over WO3: Alteration of electron transfer mechanism | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Lee, Jaesang | - |
dc.identifier.doi | 10.1016/j.cej.2021.134401 | - |
dc.identifier.scopusid | 2-s2.0-85123267399 | - |
dc.identifier.wosid | 000813006000017 | - |
dc.identifier.bibliographicCitation | CHEMICAL ENGINEERING JOURNAL, v.432 | - |
dc.relation.isPartOf | CHEMICAL ENGINEERING JOURNAL | - |
dc.citation.title | CHEMICAL ENGINEERING JOURNAL | - |
dc.citation.volume | 432 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental | - |
dc.relation.journalWebOfScienceCategory | Engineering, Chemical | - |
dc.subject.keywordPlus | BENZOIC-ACID | - |
dc.subject.keywordPlus | PHOTOASSISTED DEGRADATION | - |
dc.subject.keywordPlus | DYE POLLUTANTS | - |
dc.subject.keywordPlus | WATER | - |
dc.subject.keywordPlus | OXIDATION | - |
dc.subject.keywordPlus | OXYGEN | - |
dc.subject.keywordPlus | RADIOLYSIS | - |
dc.subject.keywordPlus | PHOTOLYSIS | - |
dc.subject.keywordPlus | HYDROGEN | - |
dc.subject.keywordAuthor | Tungsten oxide | - |
dc.subject.keywordAuthor | Photocatalysis | - |
dc.subject.keywordAuthor | Hydroxyl radical | - |
dc.subject.keywordAuthor | Hydrogen peroxide | - |
dc.subject.keywordAuthor | Bicarbonate | - |
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