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Active oxygen species (O-1(2), O-2(center dot-)) generation in the system of TiO2 colloid sensitized by hypocrellin B
Xu, SJ; Shen, JQ; Chen, S; Zhang, MH; Shen, T
2002-05-01
Source PublicationJOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
ISSN1011-1344
Volume67Issue:1Pages:64-70
AbstractTiO2 semiconductor colloids have been successfully employed in environmental clean-Lip, antibacterial and bactericidal action under ultraviolet light due to its strong redox ability and high yield of active oxygen species (O-1(2), O-2(.-), (OOH)-O-.) generation. Hypocrellin B, isolated from Hypocrella bambusae (B.et.Br) Sacc, a natural pigment with strong and broad absorption over the visible light region, was used in our work in an attempt to extend the photoresponse of TiO2 to visible light and maintain the high generation of active oxygen under visible light illumination. The formation of the HB-TiO2 chelate was characterized by UV-Vis and surface enhanced raman spectroscopy (SERS) and it was found that the chelate still had high efficiency of active oxygen generation. The possible generation mechanism was explored by Electron Paramagnetic Resonance (EPR) and time-resolved transient spectra techniques, showing that singlet oxygen (O-1(2)) and superoxide radical anion (O-2(.-)) were produced via energy transfer and electron transfer, respectively. The application of HB-TiO2 chelate in environment protection and bacteria sterilization was implied. (C) 2002 Elsevier Science BY All rights reserved.
KeywordHypocrellin b Tio2 Colloid Time-resolved Absorption Spectra Epr Active Oxygen
Indexed BySCI
Language英语
WOS IDWOS:000175787800009
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:46[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/78358
Collection中国科学院化学研究所
Corresponding AuthorZhang, MH
AffiliationChinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Xu, SJ,Shen, JQ,Chen, S,et al. Active oxygen species (O-1(2), O-2(center dot-)) generation in the system of TiO2 colloid sensitized by hypocrellin B[J]. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY,2002,67(1):64-70.
APA Xu, SJ,Shen, JQ,Chen, S,Zhang, MH,&Shen, T.(2002).Active oxygen species (O-1(2), O-2(center dot-)) generation in the system of TiO2 colloid sensitized by hypocrellin B.JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY,67(1),64-70.
MLA Xu, SJ,et al."Active oxygen species (O-1(2), O-2(center dot-)) generation in the system of TiO2 colloid sensitized by hypocrellin B".JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 67.1(2002):64-70.
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