溴化氧铋(BiOBr)光催化降解亚甲基蓝的研究

Study on photocatalytic degradation of methylene blue by BiOBr under visible light

主要研究了外界条件如pH、催化剂用量和反应液浓度对可见光催化溴化氧铋(BiOBr)降解亚甲基蓝溶液性能的影响和降解机理推断.通过添加各种自由基清除剂深入探讨了其对反应体系中活性氧自由基的抑制作用,从而推测溴化氧铋(BiOBr)降解亚甲基蓝的反应机理,并确定在该反应中起主要作用的活性氧形态.

This paper studied the photocatalytic degradation of the methylene blue （MB） by BiOBr under visible light. The influence factors, such as pH, amount of catalysts and the con- centrations of reaction solution were investigated so as to check the performance of the process and understand the mechanism of degradation of MB. The inhibition of reactive oxygen species （ROS） in the reaction system was determined by adding various radical scavengers. Above re- sults help to deduce photodegradation mechanism of MB catalyzed by BiOBr and the mainly active oxygen species in the reaction system.