中文摘要：

为了在可见光条件下有效光解去除抗生素,制备了石墨烯-二氧化钛复合物（Graphene-TiO2,G-TiO2）,考察了不同因素对G-TiO2的光解作用的影响以及催化剂的重复利用效果。研究结果表明,G-TiO2在可见光下对泰乐菌素（tylosin,TYL）有一定的去除效果,光解速率随溶液pH的增加先增加后减小,随着TYL初始浓度的增加而减小。石墨烯含量为1%时光解效果最好,且催化剂有较好的重复利用性。初步分析,G-TiO2对TYL的去除包括吸附和光解2个过程,且光生空穴及·OH自由基反应可能是TYL光解的主要机制。本研究表明,G-TiO2是一种理想材料,可用于去除水中的抗生素微污染。

英文摘要：

In order to photodegrade and remove antibiotic in water under visible light,graphene-titanium dioxide composite（G-TiO2） was prepared.Effects of factors on photodegradation of tylosin and reuse of catalyst were investigated.The results showed that the tylosin was removed when using G-TiO2 in visible light.The photodegradation rate increased firstly and then decreased when pH value continued to increase.Moreover,increasing concentration of tylosin reduced the photodegradation rate.Especially,graphene content of 1% showed the best photodegradation performance and good reusability of the catalyst.Removal of tylosin by G-TiO2 might include adsorption and photodegradation processes,additionally electron-hole effect and reaction by ·OH might be the domain mechanisms of photodegradation of tylosin under visible light conditions.The results showed that G-TiO2 is an effective material to remove trace tylosin in water.