工业水处理 ›› 2012, Vol. 32 ›› Issue (9): 16-20. doi: 10.11894/1005-829x.2014.32(09)16

• 试验研究 • 上一篇    下一篇

Ce-TiO2/SiO2模拟太阳光下催化降解亚甲基蓝的研究

刘瑜1,2, 杨晓青1, 于宏兵1, 展思辉1, 周奇彬1, 王浩闻1, 杨慧2   

  1. 1. 南开大学环境科学与工程学院, 天津 300071;
    2. 天津市水利科学研究院, 天津 300061
  • 收稿日期:2012-06-28 出版日期:2012-09-20 发布日期:2012-09-20
  • 通讯作者: 于宏兵,教授,博导。E-mail:hongbingyu1130@sina.com E-mail:hongbingyu1130@sina.com
  • 作者简介:刘瑜(1986-),博士研究生
  • 基金资助:

    国家水体污染控制与治理科技重大专项(2009ZX07208-002-006-01)

Photocatalytic degradation of methylene blue using Ce-TiO2/SiO2 under simulated sunlight

Liu Yu1,2, Yang Xiaoqing1, Yu Hongbing1, Zhan Sihui1, Zhou Qibin1, Wang Haowen1, Yang Hui2   

  1. 1. College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China;
    2. Tianjin Hydraulic Science Research Institute, Tianjin 300061, China
  • Received:2012-06-28 Online:2012-09-20 Published:2012-09-20

摘要:

制备了Ce掺杂的TiO2复合SiO2光催化剂(Ce-TiO2/SiO2),使用该光催化剂在模拟太阳光下催化降解亚甲基蓝水溶液,研究了催化剂用量、亚甲基蓝初始质量浓度、溶液pH、无机阴离子对光催化降解效果的影响.结果表明:n(Ce)∶n(Ti)∶n(Si)=0.002∶1∶1时所制催化剂的光催化活性最好;对于2.5 mg/L、pH为11的亚甲基蓝溶液,投加100 mg/L的光催化剂反应2 h可达到最高降解率(92.6%);NO3-、SO42-、Cl-的存在对光催化降解具有抑制作用.

关键词: Ce掺杂, TiO2/SiO2, 光催化, 亚甲基蓝

Abstract:

The Ce-TiO2/SiO2 composite has been prepared. It is used as photocatalyst for degrading methylene blue (MB) solution under simulated sunlight. The effects of the dosage of catalyst,initial mass concentration of methylene blue,pH of the solution,and inorganic anions on the photocatalytic efficiency are studied. The results indicate that the photocatalytic activity of the catalyst is the best,when it is prepared as n(Ce)∶n(Ti)∶n(Si)=0.002∶1∶1. Adding 100 mg/L of photocatalyst to methylene blue whose initial mass concentration is 2.5 mg/L,pH=11 and reaction time is 2 h,the highest degradation rate 92.6% can be obtained. The presence of NO3-,SO42- and Cl- has an inhibitory effect on the photocatalytic degradation of MB.

Key words: Ce-doped, TiO2/SiO2, photocatalysis, methylene blue

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