催化剂 论文催化剂的论文催化剂论文 反相微乳液法制备负载型TIO2光催化剂.doc

催化剂论文催化剂的论文催化剂论文
反相微乳液法制备负载型TiO2光催化剂
摘要:以TiCl4为原料、粉煤灰微珠为载体,采用反相微乳液法制备了负载型TiO2光催化剂,讨论了负载对TiO2光催化剂的性能的影响。用热分析仪(DSC-TGA)测定了前躯体的热解行为,通过X射线衍射仪(XRD) 、扫描电子显微镜(SEM)、红外光谱仪(FTIR)对催化剂的物相、形貌及特征官能团进行表征,并用可见分光光度计测定甲基橙的降解率。结果表明:焙烧温度为550 ℃时,负载型TiO2光催化剂为锐钛矿与金红石混合型,且微珠表面形成一层连续、均匀的薄膜。甲基橙催化降解实验表明:负载型TiO2催化剂对甲基橙的降解率在90 min内达到49%,明显高于未负载型光催化剂。
关键词: 负载型TiO2;光催化剂;微乳液
中图分类号:O614 文献标识码:A 文章编号:1672-1098(2010)04-0074-05
Preparation of Supported TiO2 Photocatalyst by Water-in-oil Microemulsion Reaction
HUANG Jing1, XUE Ru-jun1, ZHANG Hong-liu1, LI Li2, DAI Xin-ying1
(1. School of Chemical Engineering, Anhui University of Science and Technology, Huainan Anhui 232001, China; 2. Academic Publishing Centre, Anhui University of Science and Technology, Huainan Anhui 232001, China)
Abstract:Supported TiO2 photocatalyst was prepared by reverse microemulsion, with TiCl4 as raw material, cenosphere as carrier. Effect of loading on performance of TiO2 photocatalyst was discussed. The pyrolysis behavior of the p
recursors was characterized by differential scanning calorimetric-thermo-gravimetric analysis (DSC-TGA). The crystal structure, morphology, functional groups of the samples were characterized respectively by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectrometer (FTIR). The degradation rate of methyl orange was measured by spectro