Record Details

Fluorine-doped TiO2 powders prepared by spray pyrolysis and their improved photocatalytic activity for decomposition of gas-phase acetaldehyde

IR@CSIR-NEERI

View Archive Info
 
 
Field Value
 
Title Fluorine-doped TiO2 powders prepared by spray pyrolysis
and their improved photocatalytic activity for
decomposition of gas-phase acetaldehyde
 
Creator Lia, D
Hanedaa, H
Hishitaa, S
Ohashia, N
Labhsetwar, Nitin
 
Subject Materials Science
 
Description F-doped TiO2 (FTO) powders were synthesized by spray pyrolysis (SP) from an aqueous solution of H2TiF6. The resulting FTO powders possessed spherical particles with a rough surface morphology and a strong surface acidity. The fluorine concentrations in the FTO powders calculated from XPS spectra significantly depended on SP temperature and ranged from 2.76 to 9.40 at.%. The FTO powder prepared at SP temperature of 1173 K demonstrated the highest photocatalytic activity for the decomposition of gas-phase
acetaldehyde under both ultraviolet (UV) and visible light (vis) irradiations, and it was higher than that of commercial P 25. This high photocatalytic activity was ascribed to several beneficial effects produced by F-doping: enhancement of surface acidity, creation of
oxygen vacancies, and increase of active sites. It was interesting to point out that the vis photocatalytic activity of FTO powders was achieved by the creation of surface oxygen vacancies rather than the improvement of optical absorption property of bulk TiO2 in vis region.
 
Publisher Elsevier
 
Date 2005
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/85/1/DiLi1.pdf
Lia, D and Hanedaa, H and Hishitaa, S and Ohashia, N and Labhsetwar, Nitin (2005) Fluorine-doped TiO2 powders prepared by spray pyrolysis and their improved photocatalytic activity for decomposition of gas-phase acetaldehyde. Journal of Fluorine Chemistry, 126. pp. 69-77.
 
Relation http://neeri.csircentral.net/85/