乳液浸渍法制备纳米TiO2／硅藻土复合材料  

Preparation of Nano-TiO_2/Diatomite Compositeby Emulsion Dipping

作　　者：丁士文[1] 张兴威[1] 王利勇[1] 张永芬[2] 

机构地区：[1]河北大学化学与环境科学学院,河北保定071002 [2]河北建材职业技术学院建筑材料系,河北秦皇岛066004

出　　处：《材料工程》2008年第10期50-52,59,共4页Journal of Materials Engineering

基　　金：河北省自然科学基金(B2005000097)重点资助项目

摘　　要：采用常压液相两步水解法制备了混晶纳米TiO2,并利用原料OP制成了分散良好的乳液,采用浸渍法制备了一系列固载量不同的纳米TiO2/硅藻土复合材料,并利用SEM,XRD,EDS及吸附和光催化降解酸性大红3R实验等对其进行了表征。结果表明,所制备的材料为平均粒径12nm的锐钛矿型和金红石型混合晶型的TiO2与多孔硅藻土的复合材料。同时确定了降解酸性大红3R染料的最佳固载量为23%。证明了催化反应发生在催化剂表面,而非本体溶液中。A mixed crystal nano TiO2 was prepared by two step hydrolyzing method at atmosphere, and using the simple and easy obtained OP as a well dispersed emulsion. Dipping it into the diatomite, the TiO2/diatomite composite was made. SEM, XRD, EDS and the experiment of adsorption and pho- to-catalysis for scarlet 3R were used to characterize the samples. The result showed that it was a com- posite with mixed crystal TiO2 with anatase and futile which diameter is 12nm and diatomite which has a lot of holes. The 23 % ratio of TiO2 to diatomite and pH = 3 was best for photo catalysis experiment proves that the reaction was happened on the surface of catalyzer but not in the water.

关 键 词：液相水解 纳米混晶TiO2 乳液浸渍 复合材料 

分 类 号：TB33[一般工业技术—材料科学与工程]