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Article: Photocatalytic activity of metal oxides-The role of holes and OH • radicals

TitlePhotocatalytic activity of metal oxides-The role of holes and OH • radicals
Authors
Guo, MYNg, AMCLiu, FDjurišić, ABChan, WK
KeywordsMgO
Photocatalysis
TiO 2
ZnO
Issue Date2011
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/apcatb
Citation
Applied Catalysis B: Environmental, 2011, v. 107 n. 1-2, p. 150-157 How to Cite?
DOI: http://dx.doi.org/10.1016/j.apcatb.2011.07.008
AbstractWe have studied the photocatalytic activity of different metal oxide nanoparticles (TiO 2, ZnO, and MgO) on four different dyes in solution, ambient and vacuum environments. The metal oxide materials considered generated different reactive oxygen species in aqueous solutions and exhibited different photocatalytic activity. We found no correlation between the photocatalytic activity and superoxide ion generation. The presence of the OH • radicals contributed to the dye degradation, but the extent of this contribution was dependent on the chemical structure of the dye. The predominant degradation mechanism was found to be direct charge transfer from the metal oxide semiconductor for the experimental conditions considered in this study. © 2011 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/139617
ISSN
0926-3373
2021 Impact Factor: 24.319
2020 SCImago Journal Rankings: 4.672
ISI Accession Number ID
WOS:000294883300019
Funding AgencyGrant Number
RGC CRFCityU6/CRF/08
University Development Fund
University of Hong Kong
Funding Information:

Financial support from the project RGC CRF CityU6/CRF/08 and the Strategic Research Theme, University Development Fund, and Small Project Funding of the University of Hong Kong is acknowledged. The authors would like to thank Prof. K.Y. Chan, the University of Hong Kong, for BET surface area measurements, and Prof. S.Y. Tong and Prof. D.L. Phillips for useful discussions.

References
References in Scopus
Grants
Studies of Fundamental Properties of Nanosurfaces and Selected Applications
Studies of Fundamental Properties of Nanosurfaces and Selected Applications

 

DC FieldValueLanguage
dc.contributor.authorGuo, MYen_HK
dc.contributor.authorNg, AMCen_HK
dc.contributor.authorLiu, Fen_HK
dc.contributor.authorDjurišić, ABen_HK
dc.contributor.authorChan, WKen_HK
dc.date.accessioned2011-09-23T05:52:41Z-
dc.date.available2011-09-23T05:52:41Z-
dc.date.issued2011en_HK
dc.identifier.citationApplied Catalysis B: Environmental, 2011, v. 107 n. 1-2, p. 150-157en_HK
dc.identifier.issn0926-3373en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139617-
dc.description.abstractWe have studied the photocatalytic activity of different metal oxide nanoparticles (TiO 2, ZnO, and MgO) on four different dyes in solution, ambient and vacuum environments. The metal oxide materials considered generated different reactive oxygen species in aqueous solutions and exhibited different photocatalytic activity. We found no correlation between the photocatalytic activity and superoxide ion generation. The presence of the OH • radicals contributed to the dye degradation, but the extent of this contribution was dependent on the chemical structure of the dye. The predominant degradation mechanism was found to be direct charge transfer from the metal oxide semiconductor for the experimental conditions considered in this study. © 2011 Elsevier B.V.en_HK
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/apcatben_HK
dc.relation.ispartofApplied Catalysis B: Environmentalen_HK
dc.subjectMgOen_HK
dc.subjectPhotocatalysisen_HK
dc.subjectTiO 2en_HK
dc.subjectZnOen_HK
dc.titlePhotocatalytic activity of metal oxides-The role of holes and OH • radicalsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0926-3373&volume=107&issue=1-2&spage=150&epage=157&date=2011&atitle=Photocatalytic+activity+of+metal+oxides:+the+role+of+holes+and+OH•+radicals-
dc.identifier.emailDjurišić, AB: dalek@hku.hken_HK
dc.identifier.emailChan, WK: waichan@hku.hken_HK
dc.identifier.authorityDjurišić, AB=rp00690en_HK
dc.identifier.authorityChan, WK=rp00667en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.apcatb.2011.07.008en_HK
dc.identifier.scopuseid_2-s2.0-80051471694en_HK
dc.identifier.hkuros193650en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80051471694&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume107en_HK
dc.identifier.issue1-2en_HK
dc.identifier.spage150en_HK
dc.identifier.epage157en_HK
dc.identifier.eissn1873-3883-
dc.identifier.isiWOS:000294883300019-
dc.publisher.placeNetherlandsen_HK
dc.relation.projectStudies of Fundamental Properties of Nanosurfaces and Selected Applications-
dc.relation.projectStudies of Fundamental Properties of Nanosurfaces and Selected Applications-
dc.identifier.scopusauthoridGuo, MY=41761700900en_HK
dc.identifier.scopusauthoridNg, AMC=12140078600en_HK
dc.identifier.scopusauthoridLiu, F=24778556400en_HK
dc.identifier.scopusauthoridDjurišić, AB=7004904830en_HK
dc.identifier.scopusauthoridChan, WK=13310083000en_HK
dc.identifier.citeulike9533504-
dc.identifier.issnl0926-3373-

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