Journal of East China Normal University(Natural Sc ›› 2013, Vol. 2013 ›› Issue (5): 35-42.

• Article • Previous Articles     Next Articles

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

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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