TiO2修饰MCM-41的结构表征及光催化苯酚降解活性

 以钛酸丁酯为前驱体，合成了呈单层和双层分散状态的TiO2修饰的介孔分子筛MCM－41．用XRD，液氮温度下N2吸附－脱附曲线，FT－IR和固体UV－Vis漫反射等手段对其结构特征和氧化钛分散状态进行了表征．以苯酚降解为模型反应，考察了具有光催化活性的TiO2修饰的MCM－41的光催化活性．

Structure Characterization of TiO2-Modified Mesoporous MCM-41 and Its Photocatalytic Performance for PhOH Degradation

A series of TiO2-modified mesoporous sil icate MCM-41 sampleswith variable Ti/Si ratios, where TiO2 existed as single or double layers, have been synthesized from tetrabutyltitana te and template-fr ee MCM-41. The as-synthesized samples were characterized by XRD, N2 adsorpti on-desorption at -196 ℃, FT-IR and solid state diffuse reflectance UV-Vis s pectro scopy respectively. It was found that tetrabutyltitanate co-condensation occurr ed with OH groups of MCM-41 leading to Si-O-Ti bonds, so modifying the inner pore surface of MCM-41 after hydrolysis and calcination. The photocatalytic per formance of the TiO2-modified MCM-41 for PhOH degradation was tested, and it was found that the TiO2-modified MCM-41 exhibited high photocatalytic activ ity for oxidizing PhOH to CO2 and H2O.