Study on the mechanism of methylene blue degradation by TiO2 photocatalyst

Abstract

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

CLC Number:

X132

ZHANG Dan, XU Bin, ZHU Pei-juan, LIAN Zheng-hao, ZHAO Ya-ping. Study on the mechanism of methylene blue degradation by TiO₂ photocatalyst[J]. Journal of East China Normal University(Natural Sc, 2013, 2013(5): 35-42.

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Study on the mechanism of methylene blue degradation by TiO₂ photocatalyst

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