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Structural, optical, photoluminescence and photocatalytic characteristics of sol-gel derived CeO₂-TiO₂ films

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Title Structural, optical, photoluminescence and photocatalytic characteristics of sol-gel derived CeO₂-TiO₂ films
 
Creator Verma, Amita
Joshi, Amish G
 
Subject Photochemistry
Photoluminescence
Photocatalysis
Luminescence
Thin films
Films
Sol-gel process
Ceria
Titania
 
Description 161-167
CeO₂-TiO₂ films with different Ce/Ti mole ratios have been obtained using a simple sol-gel process. The films
(1:0.25 and 1:0.5) containing more than 50% CeO₂ content show nanocrystalline characteristics. X-ray photoelectron spectroscopic study shows the variation of Ce⁴⁺/Ce³⁺ ratio with increasing TiO₂ content. Films with greater CeO₂ content exhibit higher porosity. The observed photoluminescence in the films is attributed to various defects resulting from crystallization and also to the relative amount of Ce³⁺ in the mixed oxide matrix. The transparency in the films appears to be inversely related to their photoluminescence activity, since the 1:0.5 film, which exhibits the best photoluminescence response, is incidentally also the least transparent film. The presence of photocatalytic activity in these films shows their potential use as an efficient photocatalyst.
 
Date 2009-02-12T10:23:13Z
2009-02-12T10:23:13Z
2009-02
 
Type Article
 
Identifier 0376-4710
http://hdl.handle.net/123456789/3116
 
Language en_US
 
Relation Int. Cl. ⁸ B01J21/00; C01F17/00; C09K11/78; C01G23/00
 
Publisher CSIR
 
Source IJCA Vol.48A(2) [February 2009]