以热裂解市政污泥获得的活性炭（ASS）为载体、钛酸四丁酯为钛源、Bi （NO₃）₃·5H₂O为铋源，采用溶胶-凝胶法制备Bi₂O₃-TiO₂/ASS光催化剂，并测试其对医疗废水中的头孢成分在可见光下的光催化降解活性。结果表明，ASS的最佳制备条件为：污泥预处理的活化剂氯化锌的浓度为2 mol/L、热解温度为600℃、热解时间为40 min；Bi₂O₃、TiO₂、ASS质量比为1：1：2制备的Bi₂O₃-TiO₂/ASS三元催化剂具有较高光催化活性，可见光照射180 min对头孢氨苄的降解率可达70%，优于单体Bi₂O₃和TiO₂，表现出优越的可见光光催化性能。

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(1995-),男,硕士研究生,研究方向为污泥处理,844311500@qq.com