物理化学学报 >> 2001, Vol. 17 >> Issue (01): 23-27.doi: 10.3866/PKU.WHXB20010105

研究论文 上一篇    下一篇

纳米SnO2@TiO2的制备及其光催化性能

颜秀茹;李晓红;霍明亮;郭伟巍;巩永进   

  1. 天津大学理学院化学系,天津 300072
  • 收稿日期:2000-03-31 修回日期:2000-06-26 发布日期:2001-01-15
  • 通讯作者: 颜秀茹 E-mail:guoweiwei@eyou.com.cn

Preparation and Photocatalytic Properties of Nanometer SnO2@TiO2

Yan Xiu-Ru;Li Xiao-Hong;Huo Ming-Liang;Guo Wei-Wei;Gong Yong-Jin   

  1. Department of Chemistry,School of Science,Tianjin University,Tianjin 300072
  • Received:2000-03-31 Revised:2000-06-26 Published:2001-01-15
  • Contact: Yan Xiu-Ru E-mail:guoweiwei@eyou.com.cn

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

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.

Key words: Sol-precipitation method, Nanometer, SnO2@TiO2, Photocatalytic degradation, DDVP