Effect of Binder on the Structure and Properties of Silicon Powder-supported TiO_2 Photocatalysis Material

作     者：吴任平 郭锦榆 陈珠灵 于岩 

作者机构：College of Materials Science and EngineeringFuzhou University 

出 版 物：《Chinese Journal of Structural Chemistry》 (结构化学（英文）)

年 卷 期：2008年第27卷第10期

页      面：1245-1249页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：the Natural Science Foundation of Fujian Province(No.T08J0129) the Science and Technology Developing Foundation of Fuzhou University(No. 2008-XQ-001) Research Project of the Education Department of Fujian Province(JA05185) 

主　　题：silicon powder TiO2 photoeatalyst binder siliea sol sodium silicate 

摘      要：Recoverable TiO2 photocatalysis material supported by silicon powder was prepared with sol-gel method, afterwards the silica gol and sodium silicate were used as molding binder respectively to investigate their effects （including binder type and binder addition quantity） on the crystal structure and catalysis properties of photocatalyst. In this work, the catalysis activity was defined as the degradation rate of methyl orange solution upon ultraviolet lamp irradiation, and the specific areas were determined with nitrogen desorption method. TiO2 crystal form was measured with X-ray powder diffraction and their micro-morphology was observed with SEM. Experimental results indicate that these two binders do not affect the crystal form transformation of TiO2, but silica gol can increase the specific surface area of TiO2 photocatalyst obviously and the addition of sodium silicate can decrease it. In all, silica gol is a better candidate than sodium silicate for higher catalysis property. In conclusion, 6% silica gol is the optimal addition concentration. Under this condition, the ratio of anatase to rutile TiO2 is 64：36, the specific area is 29.67 m^2/g, and as expected, the degradation rate of methyl orange could be as high as 90% after irradiation for 5 days.