华东师范大学学报(自然科学版) ›› 2013, Vol. 2013 ›› Issue (5): 35-42.

• 环境工程 生态学 • 上一篇    下一篇

TiO2光催化降解亚甲基蓝机理的研究

章 丹1, 徐 斌2, 朱培娟1, 连正豪2, 赵雅萍1,3   

  1. 1. 华东师范大学 环境科学系,上海 200062; 2. 闵行区环境监测站，上海 200240;
    3. 华东师范大学 上海市城市化生态过程与生态恢复重点实验室，上海 200062
  • 收稿日期:2012-05-01 修回日期:2012-08-01 出版日期:2013-09-25 发布日期:2013-09-30

Study on the mechanism of methylene blue degradation by TiO2 photocatalyst

ZHANG Dan1, XU Bin2, ZHU Pei-juan1, LIAN Zheng-hao2, ZHAO Ya-ping1,3   

  1. 1. Department of Environmental Science, East China Normal University, Shanghai 200062, China;
    2. Environmental Monitoring Station of Minhang, Shanghai 200240, China;
    3. Shanghai Key Laboratory of Urbanization Ecological Restoration, East China Normal University, Shanghai 200062, China
  • Received:2012-05-01 Revised:2012-08-01 Online:2013-09-25 Published:2013-09-30

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摘要： 进行了亚甲基蓝光解、吸附及光催化对比实验，以及·OH清除剂叔丁醇、电子空穴对（e- ，h+ ）结合抑制剂过氧化氢、空穴（h+ VB）清除剂碘化钾、单线态氧（1O2）清除剂叠氮钠、超氧自由基（O·-2）清除剂苯醌对TiO2光催化降解亚甲基蓝降解率的影响实验，同时测定了光催化反应过程中H2O2的生成，证明了TiO2光催化降解亚甲基蓝体系中主要活性氧形态为·OH，O·-2和1O2 .

关键词: 亚甲基蓝, 二氧化钛, 光催化降解, 自由基清除, 活性氧形态

Abstract: In order to carry out the study, the experiments of photodegradation of methylene blue under different conditions were conducted, using different kinds of free radical scavengers, such as (CH3)3OH, H2O2, KI, NaN3 and C6H4O2. The effects of these free radical scavengers were observed. The concentration of H2O2 generated during the photodegradation of methylene blue by TiO2 was also reported. And the results of these experiments indicated that the main active oxygen substances in the reaction are ·OH, O·-2 and 1O2.

Key words: methylene blue, TiO2, photocatalytic degradation, free radical scavenging, ROS

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