Document Detail


Visible-light-Induced photocatalytic degradation of azodyes in aqueous AgI/TiO2 dispersion.
MedLine Citation:
PMID:  17256546     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Agl/Ti02 was prepared by the deposition-precipitation method and was found to be a novel visible light driven photocatalyst. The catalyst showed high efficiency for the degradation of the nonbiodegradable azodyes reactive red K-2G, reactive brilliant red X-3B, reactive red K-2BP, and reactive yellow KD-3G under visible light irradiation (lambda > 420 nm). The catalyst's activity was maintained effectively after successive cyclic experiments under visible irradiation without the destruction of AgI. On the basis of the characterization of X-ray diffraction, X-ray photoelectron spectroscopy, and Auger electron spectroscopy, the structure of AgI loaded on TiO2 did not significantly change before and after reaction. K-2G was completely decolorized and partly mineralized. The main intermediates are the small organic acids besides CO2 and cyanuric acid, which is photostable. The *OH is the main active oxygen species in the photocatalytic reaction by the studies of electron spin resonance and the effect of radical scavengers.
Authors:
Chun Hu; Xuexiang Hu; Liusuo Wang; Jiuhui Qu; Aimin Wang
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Environmental science & technology     Volume:  40     ISSN:  0013-936X     ISO Abbreviation:  Environ. Sci. Technol.     Publication Date:  2006 Dec 
Date Detail:
Created Date:  2007-01-29     Completed Date:  2007-02-27     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0213155     Medline TA:  Environ Sci Technol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  7903-7     Citation Subset:  IM    
Affiliation:
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China. huchun@rceers.ac.cn
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MeSH Terms
Descriptor/Qualifier:
Azo Compounds / analysis*
Catalysis
Coloring Agents / analysis*
Electron Spin Resonance Spectroscopy
Iodides / chemistry*
Light*
Silver Compounds / chemistry*
Titanium / chemistry*
Water
Chemical
Reg. No./Substance:
0/Azo Compounds; 0/Coloring Agents; 0/Iodides; 0/Silver Compounds; 13463-67-7/titanium dioxide; 7440-32-6/Titanium; 7732-18-5/Water; 7783-96-2/silver iodide

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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