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ESR spin-trapping detection of radical intermediates in the TiO2-assisted photo-oxidation of sulforhodamine B under visible irradiation
Liu, GM; Zhao, JC; Hidaka, H
2000-05-08
Source PublicationJOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
ISSN1010-6030
Volume133Issue:1-2Pages:83-88
AbstractThe ESR spin-trapping technique using 5,5-dimethyl-1-pyrroline-N-oxide (DMPO) and N-r-butyl-or-phenyl-nitrone (PBN) as spin-trap reagents has been applied to detect free radical intermediates generated during the in situ visible irradiation of aqueous sulforhodamine B (SRB)-TiO2 air-saturated dispersion. Hydroxyl radical ((OH)-O-.), hydroperoxyl radical (HO2.) and hydrated electrons (e,g) were detected in the TiO2-assisted photo-oxidation of SRB under visible irradiation. The mechanism for the generation of active oxygen radicals and the role of these photogenerated active oxygen radicals in the photo-oxidation process are discussed. It is suggested that the oxygen molecules rather than these active oxygen radicals are the main oxidizing agent and play an important role in the visible photo-oxidation of SRB mediated by TiO2 particles. (C) 2000 Elsevier Science S.A. All rights reserved.
KeywordEsr Spin-trapping Tio2 Visible Light Photo-oxidation Dmpo Pbn
Indexed BySCI
Language英语
WOS IDWOS:000086807400013
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:66[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/75860
Collection中国科学院化学研究所
Corresponding AuthorZhao, JC
Affiliation1.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Lab Photochem, Beijing 100080, Peoples R China
2.Meisei Univ, Frontier Res Ctr Earth Environm Protect, Hino, Tokyo 191, Japan
Recommended Citation
GB/T 7714
Liu, GM,Zhao, JC,Hidaka, H. ESR spin-trapping detection of radical intermediates in the TiO2-assisted photo-oxidation of sulforhodamine B under visible irradiation[J]. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY,2000,133(1-2):83-88.
APA Liu, GM,Zhao, JC,&Hidaka, H.(2000).ESR spin-trapping detection of radical intermediates in the TiO2-assisted photo-oxidation of sulforhodamine B under visible irradiation.JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY,133(1-2),83-88.
MLA Liu, GM,et al."ESR spin-trapping detection of radical intermediates in the TiO2-assisted photo-oxidation of sulforhodamine B under visible irradiation".JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY 133.1-2(2000):83-88.
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