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Article: Photocatalytic activity of metal oxides-The role of holes and OH • radicals
Title | Photocatalytic activity of metal oxides-The role of holes and OH • radicals | ||||||||
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Authors | |||||||||
Keywords | MgO Photocatalysis TiO 2 ZnO | ||||||||
Issue Date | 2011 | ||||||||
Publisher | Elsevier 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? | ||||||||
Abstract | We 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 Identifier | http://hdl.handle.net/10722/139617 | ||||||||
ISSN | 2023 Impact Factor: 20.2 2023 SCImago Journal Rankings: 5.112 | ||||||||
ISI Accession Number ID |
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 | |||||||||
Grants |
DC Field | Value | Language |
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dc.contributor.author | Guo, MY | en_HK |
dc.contributor.author | Ng, AMC | en_HK |
dc.contributor.author | Liu, F | en_HK |
dc.contributor.author | Djurišić, AB | en_HK |
dc.contributor.author | Chan, WK | en_HK |
dc.date.accessioned | 2011-09-23T05:52:41Z | - |
dc.date.available | 2011-09-23T05:52:41Z | - |
dc.date.issued | 2011 | en_HK |
dc.identifier.citation | Applied Catalysis B: Environmental, 2011, v. 107 n. 1-2, p. 150-157 | en_HK |
dc.identifier.issn | 0926-3373 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/139617 | - |
dc.description.abstract | We 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.language | eng | en_US |
dc.publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/apcatb | en_HK |
dc.relation.ispartof | Applied Catalysis B: Environmental | en_HK |
dc.subject | MgO | en_HK |
dc.subject | Photocatalysis | en_HK |
dc.subject | TiO 2 | en_HK |
dc.subject | ZnO | en_HK |
dc.title | Photocatalytic activity of metal oxides-The role of holes and OH • radicals | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://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.email | Djurišić, AB: dalek@hku.hk | en_HK |
dc.identifier.email | Chan, WK: waichan@hku.hk | en_HK |
dc.identifier.authority | Djurišić, AB=rp00690 | en_HK |
dc.identifier.authority | Chan, WK=rp00667 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.apcatb.2011.07.008 | en_HK |
dc.identifier.scopus | eid_2-s2.0-80051471694 | en_HK |
dc.identifier.hkuros | 193650 | en_US |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-80051471694&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 107 | en_HK |
dc.identifier.issue | 1-2 | en_HK |
dc.identifier.spage | 150 | en_HK |
dc.identifier.epage | 157 | en_HK |
dc.identifier.eissn | 1873-3883 | - |
dc.identifier.isi | WOS:000294883300019 | - |
dc.publisher.place | Netherlands | en_HK |
dc.relation.project | Studies of Fundamental Properties of Nanosurfaces and Selected Applications | - |
dc.relation.project | Studies of Fundamental Properties of Nanosurfaces and Selected Applications | - |
dc.identifier.scopusauthorid | Guo, MY=41761700900 | en_HK |
dc.identifier.scopusauthorid | Ng, AMC=12140078600 | en_HK |
dc.identifier.scopusauthorid | Liu, F=24778556400 | en_HK |
dc.identifier.scopusauthorid | Djurišić, AB=7004904830 | en_HK |
dc.identifier.scopusauthorid | Chan, WK=13310083000 | en_HK |
dc.identifier.citeulike | 9533504 | - |
dc.identifier.issnl | 0926-3373 | - |