Mesoporous and mesostructured TiO2 coatings for photocatalytic applications

被引：3
作者：
Castro, Yolanda [1 ]
Duran, Alicia [1 ]
机构：
[1] CSIC, ICV, Madrid 28049, Spain
来源：
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2014年 / 70卷 / 02期
关键词：
TiO2-anatase; Sol-gel coatings; Photocatalysis; TCE; H2S; MEK; Methyl orange; VISIBLE-LIGHT PHOTOCATALYSIS; SOL-GEL; THIN-FILMS; TITANIUM-DIOXIDE; OXIDATION; AIR; PURIFICATION; OXIDES;
D O I：
10.1007/s10971-013-3240-1
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The correlation between the textural properties and the photocatalytic activity of nanocrystalline Titanium dioxide (TiO2)-anatase films obtained by sol-gel has been investigated. Mesoporous and mesostructured TiO2-anatase films were prepared using different titanium precursors and Pluronic (F127) and polyethylene glycol hexadecyl ether P5884 (Brij58) surfactants via acid catalysis. Ca(NO3)(2) and WCl6 were incorporated to TiO2 sols to investigate the effect of the doping on the photocatalytic behaviour. The microstructure and textural properties were characterised by X-ray diffraction, spectral ellipsometry and transmission electronic microscopy. The photocatalytic properties were evaluated in aqueous solution (methyl orange) and in gas phase (trichloroethylene, sulphide acid and methyl-ethyl-ketone) using multilayer films deposited on glass-slides. TiO2-B-Brij-58 films exhibited the most efficient photocatalytic activity either in aqueous or gas medium. The Ca doping strongly enhances the photocatalytic activity associated with the reduced recombination of electrons and holes in the catalyst.
引用
收藏
页码：254 / 262
页数：9
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