Abstract: Taking the photocatalytic effect of catalyst as evaluation criteria,activated carbon (ASS) obtained from pyrolysis of municipal sludge as carrier,tetrabutyl titanate as titanium source and Bi(NO3)3·5H2O as bismuth source,Bi2O3-TiO2/ASS photocatalyst is prepared by sol-gel method,and its photocatalytic degradation activity for cephalosporin in medical wastewater is tested under visible light.The optimal preparation conditions for ASS are obtained as follows:the concentration of zinc chloride is 2 mol·L-1,pyrolysis temperature remains at 600℃,the pyrolysis lasts for 40 min,and the mass ratio of Bi2O3,TiO2 and ASS is 1:1:2.Bi2O3-TiO2/ASS ternary catalyst prepared under the optimal conditions can realize 70% degradation rate to cephalexin under visible light irradiation within 180 min,which is superior to either Bi2O3 or TiO2 alone,showing superior visible light photocatalytic performance.
秦海洋, 郑永杰, 田景芝, 刘雯雯, 赵云鹏, 郑禾山, 李硕. Bi2O3-TiO2/污泥活性炭复合催化剂的制备及其可见光催化性能研究[J]. 现代化工, 2021, 41(3): 154-158.
QIN Hai-yang, ZHENG Yong-jie, TIAN Jing-zhi, LIU Wen-wen, ZHAO Yun-peng, ZHENG He-shan, LI Shuo. Preparation of Bi2O3-TiO2/sludge activated carbon composite catalyst and study on its photocatalytic performance. Modern Chemical Industry, 2021, 41(3): 154-158.
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