TiO2, TiO2/Ag and TiO2/Au photocatalysts prepared by spray pyrolysis

被引：45
|
作者：
Haugen, Astri Bjornetun [1 ]
Kumakiri, Izumi [2 ]
Simon, Christian [2 ]
Einarsrud, Mari-Ann [1 ]
机构：
[1] Norwegian Univ Sci & Technol, Dept Mat Sci & Engn, N-7491 Trondheim, Norway
[2] SINTEF Mat & Chem, N-0314 Oslo, Norway
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2011年 / 31卷 / 03期
关键词：
Spray pyrolysis; TiO2; Photocatalysis; TITANIUM-DIOXIDE NANOMATERIALS; OXALIC-ACID; NANOPARTICLES; DEGRADATION; PARTICLES; GOLD; DEGUSSA; ANATASE; SPHERES;
D O I：
10.1016/j.jeurceramsoc.2010.10.006
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：
TiO2, TiO2/Ag and TiO2/Au photocatalysts exhibiting a hollow spherical morphology were prepared by spray pyrolysis of aqueous solutions of titanium citrate complex and titanium oxalate precursors in one-step. Effects of precursor concentration and spray pyrolysis temperature were investigated. By subsequent heat treatment, photocatalysts with phase compositions from 10 to 100% rutile and crystallite sizes from 12 to 120 nm were obtained. A correlation between precursor concentration and size of the hollow spherical agglomerates obtained during spray pyrolysis was established. The anatase to rutile transformation was enhanced with metal incorporations and increased precursor concentration. The photocatalytic activity was evaluated by oxidation of methylene blue under UV-irradiation. As-prepared TiO2 particles with large amounts of amorphous phase and organic residuals showed similar photocatalytic activity as the commercial Degussa P25. The metal incorporated samples showed comparable photocatalytic activity to the pure TiO2 photocatalysts. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：291 / 298
页数：8
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