复合模板剂自组装制备混晶纳米TiO2介孔材料及其性能研究  

Preparation and Application of Mix-crystal Mesoporous Nano-TiO2 on Composite Surfactant Templates

作　　者：董伟[1] 丁士文[1] 

机构地区：[1]河北大学化学与环境科学学院,河北保定071002

出　　处：《纳米科技》2008年第2期43-46,共4页

基　　金：河北省自然科学基金（No：B2005000097）

摘　　要：采用TiCh为原料，以十六烷基三甲基溴化胺（CTAB）、聚乙二醇（PEG400、PEG6000）及十二烷基苯磺酸钠（SDBS）两两组合为复合模板和结构导向剂，利用常压液相-水热合成两步反应制备了纳米混晶TiO2介孔材料。XRD分析结果表明，产品为金红石-锐钛矿的混晶结构；TEM观察，样品是由均匀球形颗粒组装成的无序介孔材料，一次粒径约为10～15nm；N2吸附-脱附等温曲线形状为Langmuir Ⅳ型，是典型的介孔结构吸附-脱附等温线，最可及孔径约为11nm。光催化性能实验表明，在40W目光灯照射60min后，该系列介孔材料可有效的降解工业废水中的有毒氰根含量和有机染料。研究结果还表明，采用CTAB-SDBS作为复合模板和结构导向剂时制得的介孔材料的孔结构和光催化降解性能较好。Nanometric mix-crystal mesoporous TiO2 was prepared by normal pressure liquid-phase and hydrothermal processes on different composite surfactant templates （CTAB-SDBS, CTAB-PEG6000 PEG6000-SDBS）, using TICl4 as raw materials. XRD analysis results indicated, the samples were mix-crystal TiO2 with futile phase and anatase phase. TEM results indicated that the particles were basically spherical, well dispersed. The crystallites size was in the range of 10-15nm. The N2 adsorption-desorption isotherms of the synthesized materials exhibited typical Langmuire Ⅳ pattern, and the pore structure among particles were mesoporous texture lacking of long-range order with the average pore diameters about 11nm. The photocatalytical experiments showed that the samples can degrade effectively cyanide industrial wastewaters and organic dye under 40W daylight lamp, and indicated that the sample using CTAB-SDBS as a composite surfactant template had the better structure and function than others.

关 键 词：混晶TiO2介孔材料 复合模板剂 光催化降解 

分 类 号：TB34[一般工业技术—材料科学与工程]