Abstract:Bi2WO6 was synthesized by hydrothermal method. The results of XRD and UV-vis DRS indicated that the synthesized catalyst was in good crystallization and displayed high absorbance in the range of visible light.The photocatalytic degradation efficiency of Bi2WO6 toward reactive brilliant red X-3B was investigated. It showed that the dosage of Bi2WO6, the initial concentration of X-3B and pH values of the reaction solution affected the degradation efficiency. The optimum reaction conditions were: 2 g/L Bi2WO6, 20 mg/L X-3B and pH 5.18. Under this condition, 86% X-3B could be degraded under visible light irradiation for 60 min. Addition of H2O2 in the reaction system stimulated the photodegradation significantly. More than 96% X-3B could be removed within only 30 min with 2 mL/L H2O2 added. The photocatalytic degradation of X-3B by Bi2WO6 followed a first-order reaction kinetic. The azo bond (-N=N-), i.e, the chromophoric group of the reactive brilliant red X-3B, could be broken down by the photocatalysis of the Bi2WO6 powders effectively and the solution was completely decolored. During the limited reaction time (80 min), X-3B was not completely mineralized. Some intermediates were formed during the reaction.
张豪, 王春英, 李方1, 王亚琼, 张涛, 王钊, 祝凌燕. Bi2WO6可见光催化降解活性艳红X-3B的研究[J]. 中国环境科学, 2010, 30(12): 1608-1613.
ZHANG Hao, WANG Chun-Ying, LI Fang-1, WANG Ya-Qiong, ZHANG Tao, WANG Zhao, ZHU Ling-Yan. Study on photocatalytic degradation of reactive brilliant red X-3B by Bi2WO6 under visible light. . CHINA ENVIRONMENTAL SCIENCECE, 2010, 30(12): 1608-1613.