工业水处理 ›› 2011, Vol. 31 ›› Issue (5): 35-38,45.doi: 10.11894/1005-829x.2011.31.(05).35

• 试验研究 • 上一篇    下一篇

Fe3+/La3+共掺杂TiO2光电极对表面活性剂的光电催化降解

王丽华, 董慧曦, 刘运松, 杨姗姗   

  1. 辽宁工程技术大学资源与环境工程学院, 辽宁阜新 123000
  • 收稿日期:2011-02-28 出版日期:2011-05-20 发布日期:2011-05-19
  • 作者简介:王丽华(1966- ),1989年毕业于沈阳化工学院,副教授
  • 基金资助:

    辽宁工程技术大学创新性实验计划项目(GC20080104)

Photoelectrocatalytic degradation of surfactant by Fe3+/La3+co-doped TiO2 photoelectrode

Wang Lihua, Dong Huixi, Liu Yunsong, Yang Shanshan   

  1. College of Resource and Environmental Engineering, Liaoning Technical University, Fuxin 123000, China
  • Received:2011-02-28 Online:2011-05-20 Published:2011-05-19

摘要:

采用溶胶-凝胶法制备了Fe3+/La3+共掺杂TiO2/玻璃电极,并将其作为工作电极,以饱和甘汞电极作参比电极,金属Ag片为对电极,0.1 mol/L Na2SO4为支持电解质,建立了三电极光电催化体系,对十二烷基苯磺酸钠配制的表面活性剂废水进行降解。实验表明,Freundlich等温吸附方程能很好地描述Fe3+/La3+共掺杂TiO2/玻璃电极对表面活性剂的吸附行为。实验同时考察了初始CODCr、外加偏压、电极面积、外加H2O2浓度以及涂覆层数对光电催化降解速率的影响,初步确定最佳的实验条件为:初始CODCr为20 mg/L,外加偏压为1.5 V,电极面积为44 cm2,外加H2O2浓度为55 mmol/L,涂覆层数为3层。

关键词: 光电催化, TiO2薄膜, Fe3+/La3+共掺杂, 表面活性剂

Abstract:

Fe3+/La3+ co-doped TiO2 electrode deposited on glass has been prepared by sol-gel method.The electrode is used as working electrode,saturated calomel electrode as the reference electrode,metal silver plate as the counter electrode,0.1 mol/L of Na2SO4 as supporting electrolyte.The three-electrode photoelectrocatalytic system which is used for degrading sodium dodecyl benzene sulfonate has thus been set up. Experiments show that the adsorption effect of Fe3+/La3+ co-doped TiO2 catalysts on surfactant can be described nicely by Freundlich adsorption isotherm equation.The influences of the initial CODCr,additional voltage bias,area of electrode,additional concentration of H2O2 and the numbers of coating layer on photoelectrocatalytic degradation rate are investigated.The best experimental conditions are determined preliminarily as follows:the initial CODCr is 20 mg/L,additional voltage bias 1.5 V,area of electrode 44 cm2,additional concentration of H2O2 55 mmol/L,and three coating layers.

Key words: photolectrocatalysis, TiO2 film, Fe3+/La3+ co-doped, surfactant