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纳米SnO2@TiO2的制备及其光催化性能
引用本文:颜秀茹,李晓红,霍明亮,郭伟巍,巩永进. 纳米SnO2@TiO2的制备及其光催化性能[J]. 物理化学学报, 2001, 17(1): 23-27. DOI: 10.3866/PKU.WHXB20010105
作者姓名:颜秀茹  李晓红  霍明亮  郭伟巍  巩永进
作者单位:Department of Chemistry,School of Science,Tianjin University,Tianjin 300072
基金项目:天津市自然科学基金资助项目(973606711)
摘    要:
以SnCl4和Ti(OBu)4为原料,采用活性层包覆法制备了SnO2@TiO2包覆型复合光催化剂,并用XPS、IR、XRD、TEM和BET等手段进行了表征,以二甲基二氯乙烯基磷酸酯(简称DDVP)稀释液为模拟废水,考察了SnO2@TiO2的光催化活性及降解液初始浓度对反应动力学的影响.结果表明:包覆粒子由锐钛矿型TiO2和金红石型SnO2组成;与纯SnO2、TiO2相比,SnO2@TiO2包覆粒子的光催化活性明显提高,DDVP稀释液被光催化降解属于零级反应,但反应表观速率常数与降解液初始浓度成正比.

关 键 词:纳米SnO2@TiO2  溶胶-沉淀法  光催化降解  DDVP  
收稿时间:2000-03-31
修稿时间:2000-03-31

Preparation andPhotocatalytic Properties of Nanometer SnO2@TiO2
Yan XiuRu. Preparation andPhotocatalytic Properties of Nanometer SnO2@TiO2[J]. Acta Physico-Chimica Sinica, 2001, 17(1): 23-27. DOI: 10.3866/PKU.WHXB20010105
Authors:Yan XiuRu
Affiliation:Department of Chemistry,School of Science,Tianjin University,Tianjin 300072
Abstract:
SnO2@TiO2 coated particles have been prepared with Ti(OC4H9)4 and SnO2•nH2O as precursors by coated on active surface.In order to improve the photocatalytic degradation activity of SnO2@TiO2 for DDVP,the conditions of preparation were studied and better photocatalytic activity was obtained.Its morphology and structure were characterized by XRD,SEM,TEM,XPS、IR and BET.The result indicated:That SnO2@TiO2 is composed of nanometer ranatase TiO2 and rutile SnO2,and the photocatalytic activities of SnO2@TiO2 are better than those of SnO2 and TiO2,the apparent rate constant k of the photocatalytic degradation of DDVP is related to the initial concentration of DDVP solution.The reaction is not a simple zero order reaction.
Keywords:Sol-precipitation method  Nanometer  2@TiO2',')  "  >SnO2@TiO2  Photocatalytic degradation  DDVP
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