LED光源下g-C3N4催化降解抗生素的研究

Study of g-C3N4 catalytic degradation of antibiotics under LED light

本实验采用热缩聚合法,以三聚氰胺为原料制备石墨相氮化碳(g-C3N4)。以g-C3N4为光催化剂,LED光源下进行降解四环素的研究。考察四环素初始浓度、催化剂用量、溶液初始温度、初始pH值等因素对光催化降解的影响。并通过正交实验优化其降解条件。实验结果表明:在四环素初始浓度为60mg·L-1、催化剂用量为25mg·L-1、实验初始温度为24℃、溶液初始pH值为9,降解率最高可达到85.89%。

In this experiment,graphitic phase carbon nitride(g-C3N4)was prepared by heat polycondensation using melamine as raw material.The degradation of tetracycline was studied under LED light using carbon nitride as photocatalyst.The effect of the initial concentration of tetracycline,the amount of catalyst used,the initial temperature of the solution,and the initial pH on photocatalytic degradation was investigated.and optimize their degradation conditions by orthogonal experiments.The experimental results showed that the degradation rate could reach 85.89%at the initial concentration of 60mg·L-1 of tetracycline,25mg·L-1 of catalyst,the initial temperature of 24℃and the initial pH of the solution was 9.