摘要：

利用光催化技术降解氧氟沙星，是处理喹诺酮类抗生素废水的有效途径。通过固相扩散法将TiO₂微球(MS-TiO₂)负载于沸石上制备MS-TiO₂/沸石复合催化剂，采用XRD、SEM、UV-Vis对其进行表征。以模拟太阳光催化降解水中氧氟沙星考察其催化活性。结果表明，当TiO₂负载量为35%，煅烧温度为450℃，催化剂投加量为1.5 g/L，废水初始pH为6.5时，光催化氧氟沙星的降解率达到最佳，为95.1%。氧氟沙星光催化降解过程符合一级动力学方程。

关键词: TiO₂微球/沸石, 光催化, 模拟太阳光, 氧氟沙星

Abstract:

Photocatalytic degradation of ofloxacin is an effective way to relieve quinolone antibiotic wastewater. MS-TiO₂/zeolite composite catalyst was prepared by loading TiO₂ microspheres(MS-TiO₂) on zeolite by solid phase diffusion method. The samples were characterized by XRD, SEM, UV-Vis. The catalytic activity for ofloxacin degradation was investigated under simulated solar irradiation. The results showed that the degradation rate of ofloxacin reached an optimal 95.1% at conditions of TiO₂ loading 35%, the calcination temperature 450℃, the catalyst dosage 1.5 g/L, and the initial pH 6.5. And the photocatalytic degradation reaction of ofloxacin can be described by the first-order kinetic equation.

Key words: TiO₂ microspheres/zeolite, photocatalytic, simulated solar irradiation, ofloxacin

中图分类号: 

• X703.1