Oxygen vacancy engineering of cerium oxide for the selective photocatalytic oxidation of aromatic pollutants
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Bui, H.T. | - |
dc.contributor.author | Weon, S. | - |
dc.contributor.author | Bae, J.W. | - |
dc.contributor.author | Kim, E.-J. | - |
dc.contributor.author | Kim, B. | - |
dc.contributor.author | Ahn, Y.-Y. | - |
dc.contributor.author | Kim, K. | - |
dc.contributor.author | Lee, H. | - |
dc.contributor.author | Kim, W. | - |
dc.date.accessioned | 2021-08-30T02:18:24Z | - |
dc.date.available | 2021-08-30T02:18:24Z | - |
dc.date.created | 2021-06-17 | - |
dc.date.issued | 2021-02-15 | - |
dc.identifier.issn | 0304-3894 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/49386 | - |
dc.description.abstract | The engineering of oxygen vacancies in CeO2 nanoparticles (NPs) allows the specific fine-tuning of their oxidation power, and this can be used to rationally control their activity and selectivity in the photocatalytic oxidation (PCO) of aromatic pollutants. In the current study, a facile strategy for generating exceptionally stable oxygen vacancies in CeO2 NPs through simple acid (CeO2-A) or base (CeO2-B) treatment was developed. The selective (or mild) PCO activities of CeO2-A and CeO2-B in the degradation of a variety of aromatic substrates in water were successfully demonstrated. CeO2-B has more oxygen vacancies and exhibits superior photocatalytic performance compared to CeO2-A. Control of oxygen vacancies in CeO2 facilitates the adsorption and reduction of dissolved O2 due to their high oxygen-storage ability. The oxygen vacancies in CeO2-B as active sites for oxygen-mediated reactions act as (i) adsorption and reduction reaction sites for dissolved O2, and (ii) photogenerated electron scavenging sites that promote the formation of H2O2 by multi-electron transfer. The oxygen vacancies in CeO2-B are particularly stable and can be used repeatedly over 30 h without losing activity. The selective PCOs of organic substrates were studied systematically, revealing that the operating mechanisms for UV-illuminated CeO2-B are very different from those for conventional TiO2 photocatalysts. Thus, the present study provides new insights into the design of defect-engineered metal oxides for the development of novel photocatalysts. © 2020 Elsevier B.V. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | Elsevier B.V. | - |
dc.subject | Aromatization | - |
dc.subject | Cerium oxide | - |
dc.subject | Dissolved oxygen | - |
dc.subject | Electron transport properties | - |
dc.subject | Oxidation | - |
dc.subject | Oxide minerals | - |
dc.subject | Photocatalytic activity | - |
dc.subject | Pollution | - |
dc.subject | Titanium dioxide | - |
dc.subject | Water treatment | - |
dc.subject | Adsorption and reduction | - |
dc.subject | Aromatic pollutants | - |
dc.subject | Aromatic substrates | - |
dc.subject | Operating mechanism | - |
dc.subject | Photocatalytic oxidations | - |
dc.subject | Photocatalytic performance | - |
dc.subject | Photogenerated electrons | - |
dc.subject | Vacancy engineering | - |
dc.subject | Oxygen vacancies | - |
dc.subject | dissolution | - |
dc.subject | nanoparticle | - |
dc.subject | oxidation | - |
dc.subject | oxide group | - |
dc.subject | performance assessment | - |
dc.subject | reduction | - |
dc.subject | ultrastructure | - |
dc.title | Oxygen vacancy engineering of cerium oxide for the selective photocatalytic oxidation of aromatic pollutants | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Weon, S. | - |
dc.identifier.doi | 10.1016/j.jhazmat.2020.123976 | - |
dc.identifier.scopusid | 2-s2.0-85092633771 | - |
dc.identifier.wosid | 000634297700005 | - |
dc.identifier.bibliographicCitation | Journal of Hazardous Materials, v.404 | - |
dc.relation.isPartOf | Journal of Hazardous Materials | - |
dc.citation.title | Journal of Hazardous Materials | - |
dc.citation.volume | 404 | - |
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.journalResearchArea | Environmental Sciences & Ecology | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental | - |
dc.relation.journalWebOfScienceCategory | Environmental Sciences | - |
dc.subject.keywordPlus | Aromatization | - |
dc.subject.keywordPlus | Cerium oxide | - |
dc.subject.keywordPlus | Dissolved oxygen | - |
dc.subject.keywordPlus | Electron transport properties | - |
dc.subject.keywordPlus | Oxidation | - |
dc.subject.keywordPlus | Oxide minerals | - |
dc.subject.keywordPlus | Photocatalytic activity | - |
dc.subject.keywordPlus | Pollution | - |
dc.subject.keywordPlus | Titanium dioxide | - |
dc.subject.keywordPlus | Water treatment | - |
dc.subject.keywordPlus | Adsorption and reduction | - |
dc.subject.keywordPlus | Aromatic pollutants | - |
dc.subject.keywordPlus | Aromatic substrates | - |
dc.subject.keywordPlus | Operating mechanism | - |
dc.subject.keywordPlus | Photocatalytic oxidations | - |
dc.subject.keywordPlus | Photocatalytic performance | - |
dc.subject.keywordPlus | Photogenerated electrons | - |
dc.subject.keywordPlus | Vacancy engineering | - |
dc.subject.keywordPlus | Oxygen vacancies | - |
dc.subject.keywordPlus | dissolution | - |
dc.subject.keywordPlus | nanoparticle | - |
dc.subject.keywordPlus | oxidation | - |
dc.subject.keywordPlus | oxide group | - |
dc.subject.keywordPlus | performance assessment | - |
dc.subject.keywordPlus | reduction | - |
dc.subject.keywordPlus | ultrastructure | - |
dc.subject.keywordAuthor | CeO2 | - |
dc.subject.keywordAuthor | Oxygen vacancy | - |
dc.subject.keywordAuthor | Photocatalytic mild oxidation | - |
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
145 Anam-ro, Seongbuk-gu, Seoul, 02841, Korea+82-2-3290-2963
COPYRIGHT © 2021 Korea University. All Rights Reserved.
Certain data included herein are derived from the © Web of Science of Clarivate Analytics. All rights reserved.
You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.