Zr掺杂TiO_2介孔材料光催化降解头孢氨苄

采用固相合成法制备了Zr掺杂TiO_2(Zr-TiO_2),运用XRD技术对其进行了表征,并将其用于水中头孢氨苄的光催化降解,通过单因素实验及正交实验优化了光催化反应条件。结果表明:制备的Zr-TiO_2为锐钛矿型介孔材料,孔径约为8.12 nm;各因素对头孢氨苄去除率的影响由大到小依次为光照时间、Zr-TiO_2投加量、初始头孢氨苄质量浓度;在Zr-TiO_2投加量为1.5 g/L、初始头孢氨苄质量浓度为10 mg/L、溶液pH为7.0、光照(300 W UV)时间为1.5 h的优化条件下,头孢氨苄去除率高达99.46%;Zr-TiO_2光催化剂的重复使用性能良好。

Photocatalytic degradation of cefalexin by Zr-doped TiO2 mesoporous material

Zr-doped TiO₂ （Zr-TiO₂） was prepared by solid-phase synthesis for photocatalytic degradation of cefalexin in solution and characterized by XRD. The optimum reaction conditions were confirmed by single factor experiments and orthogonal experiments. The results showed that：The Zr-TiO₂ was anatase type mesoporous material with about 8.12 nm of pore size;The factors affecting cefalexin removal were arrayed in descending order with irradiation time,Zr-TiO₂ amount and initial cefalexin mass concentration;Under the optimum reaction conditions of Zr-TiO₂ amount 1.5 g/L,initial cefalexin mass concentration 10 m/L,solution pH 7.0 and irradiation time 1.5 h （300 W UV）,the cefalexin removal rate was up to 99.46%;In addition,the photocatalyst had good reuse performance.