Preparation of TiO2 Fine Particles Supported on Silica Gel as Photocatalyst
Preparation of TiO2 Fine Particles Supported on Silica Gel as Photocatalyst
复制标题
硅胶负载TiO2细颗粒光催化剂的制备
DOI：
10.2109/jcersj.102.702
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
M. Yamane
中科院分区：
文献类型：
--
作者：
A. Yasumori;K. Yamazaki;S. Shibata;M. Yamane
为了获得较高的光催化活性，采用溶胶-凝胶法制备了负载铂纳米TiO 2 微粒的复合硅胶，并探讨了TiO 2 微粒在水溶液中光催化产氢的机理。热处理后的复合凝胶的氢生成速率几乎是TiO 2 溶胶在乙醇水溶液中的氢生成速率的4倍。然而，从纯去离子水中产生的氢气很少。当检查氢发生率与热处理的变化、光生Ti 3+ 离子的量和复合凝胶的结构之间的相关性时，认为复合凝胶的光催化活性受到TiO 2 细颗粒的表面状况和晶相的影响。
The composite silica gel which supported nanometer-size TiO 2 fine particles with platinum was prepared by the sol-gel method in order to obtain a high photocatalytic activity and to discuss the mechanism of photocatalytic hydrogen generation by TiO 2 fine particles in aqueous solution. The heat-treated composite gel showed hydrogen generation rate almost 4 times larger than that of TiO 2 sol in aqueous ethanol solution. However, little hydrogen was generated from pure deionized water. The photocatalytic activity of the composite gel is considered to be affected by both the surface condition and the crystalline phase of TiO 2 fine particles when the correlation among the changes with heat treatment in hydrogen generation rate was examined, the amount of photogenerated Ti 3+ ions and the structure of composite gel