INVESTIGATION OF WO3-DOPED TiO2 FILM COMPOSITE PHOTOCATALYST
来源期刊：Acta Metallurgica Sinica2004年第3期
论文作者：Q.Han K.R.Liu J.S.Chen X.J.Wei L.Jiang Q.F.Meng
Key words：ultrasonic; sol-gel process; photocatalytic; photodegradation;
Abstract: The nano-crystal composite WO3-TiO2 photocatalyst was prepared by ultrasonic assisted sol-gel process. The effects of various factors, such as the crystal form, the substrates, the pH, the dissolved oxygen and the ultrasonic on the photocatalytic activity were investigated in view of the photodegradation of Rhodamine B. The results show that the crystal form of WO3-TiO2 film with highest photocatalytic activity is futile. The introduction of ultrasonic to the course of preparation can accelerate the deposit time of the sol and increase the photocatalytic activity significantly in view of the highest photodegradation of Rhodamine B being 72.7% in 5 hours. The porous titanium plate is the most suitable substrate in four kinds of investigated materials.Meanwhile the smaller the pH and the higher the concentration of the dissolved oxygen in the solution is, the higher the photodegradation is.
Q.Han1，K.R.Liu1，J.S.Chen1，X.J.Wei1，L.Jiang1，Q.F.Meng1
(1.School of Materials & Metallurgy, Northeastern University, Shenyang 110004, China)
Abstract:The nano-crystal composite WO3-TiO2 photocatalyst was prepared by ultrasonic assisted sol-gel process. The effects of various factors, such as the crystal form, the substrates, the pH, the dissolved oxygen and the ultrasonic on the photocatalytic activity were investigated in view of the photodegradation of Rhodamine B. The results show that the crystal form of WO3-TiO2 film with highest photocatalytic activity is futile. The introduction of ultrasonic to the course of preparation can accelerate the deposit time of the sol and increase the photocatalytic activity significantly in view of the highest photodegradation of Rhodamine B being 72.7% in 5 hours. The porous titanium plate is the most suitable substrate in four kinds of investigated materials.Meanwhile the smaller the pH and the higher the concentration of the dissolved oxygen in the solution is, the higher the photodegradation is.
Key words:ultrasonic; sol-gel process; photocatalytic; photodegradation;
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