Document Detail


Photocatalytic degradation of aqueous propoxur solution using TiO2 and Hbeta zeolite-supported TiO2.
MedLine Citation:
PMID:  18455297     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Photocatalytic activity of TiO2 and zeolites supported TiO2 were investigated using propoxur as a model pollutant. Hbeta, HY and H-ZSM-5 zeolites were examined as supports for TiO2. Hbeta was chosen as the TiO2 support based on the adsorption capacity of propoxur on these zeolites (Hbeta>HY=H-ZSM-5). TiO2/Hbeta photocatalysts with different wt.% were prepared and characterized by XRD, FT-IR and BET surface area. The progress of photocatalytic degradation of aqueous propoxur solution using TiO2 (Degussa P-25) and TiO2 supported on Hbeta zeolite was monitored using TOC analyzer, HPLC and UV-vis spectrophotometer. The degradation of propoxur was systematically studied by varying the experimental parameters in order to achieve maximum degradation efficiency. The initial rate of degradation with TiO2/Hbeta was higher than with bare TiO2. TOC results revealed that TiO2 requires 600min for complete mineralization of propoxur whereas TiO2/Hbeta requires only 480min. TiO2/Hbeta showed enhanced photodegradation due to its high adsorption capacity on which the pollutant molecules are pooled closely and hence degraded effectively.
Authors:
M Mahalakshmi; S Vishnu Priya; Banumathi Arabindoo; M Palanichamy; V Murugesan
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-03-29
Journal Detail:
Title:  Journal of hazardous materials     Volume:  161     ISSN:  0304-3894     ISO Abbreviation:  J. Hazard. Mater.     Publication Date:  2009 Jan 
Date Detail:
Created Date:  2008-11-18     Completed Date:  2009-02-24     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9422688     Medline TA:  J Hazard Mater     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  336-43     Citation Subset:  IM    
Affiliation:
Department of Chemistry, Anna University, Chennai 600025, India.
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MeSH Terms
Descriptor/Qualifier:
Adsorption
Catalysis
Hydrogen-Ion Concentration
Molecular Structure
Photochemistry
Propoxur / chemistry*
Solutions
Spectrophotometry
Surface Properties
Titanium / chemistry*
X-Ray Diffraction
Zeolites / chemistry*
Chemical
Reg. No./Substance:
0/Solutions; 114-26-1/Propoxur; 1318-02-1/Zeolites; 13463-67-7/titanium dioxide; 7440-32-6/Titanium

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


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