微米级TiO2/AC催化剂在光催化-膜分离耦合反应装置中降解酸性红B废水

采用X射线衍射分析、扫描电镜分析和傅里叶红外光谱分析对溶胶-凝胶法制得的负载型微米级TiO₂/活性炭（AC）催化剂性能进行了表征，并对其在光催化-膜分离耦合反应装置中光催化降解酸性红B废水时的性能和膜通量的影响进行了研究。结果表明：在最佳煅烧温度400℃时负载的TiO₂以锐钛矿为主，与载体活性炭之间以Ti-O-C键结合，且分布较为均匀；微米级TiO₂/AC催化剂的光催化降解性能随其煅烧温度的升高和粒径的减小而均呈现为先增加、后降低的趋势，TiO₂/AC对膜通量的影响则随煅烧温度的升高和粒径的减小而呈先降低、后增加的趋势，且TiO₂/AC粒径以10.272μm为宜。椰壳活性炭为载体的TiO₂/AC催化剂的光催的化降解性能高于褐煤活性炭为载体的，且前者对膜通量的影响更小。微米级TiO₂/AC催化剂的光催化降解性能高于商业TiO₂的，且对膜通量的影响比商业TiO₂的低。

Degradation of Acid Red B wastewater by micron TiO2/AC catalyst in photocatalytic-membrane separation coupling reaction

The properties of load type micro TiO₂/AC catalyst prepared by sol-gel method was characterized by XRD,SEM and FTIR,and the photocatalytic degradation performance of the catalyst and its influence on membrane flux were studied by photocatalytic degrading Acid Red B wastewater in photocatalytic-membrane separation coupling reaction. The results showed that at the optimum calcination temperature of 400℃,the TiO₂ supported on the catalyst and its distribution was mainly anatase and relatively homogenous respectively,and TiO₂ and carrier activated carbon was combined by Ti-O-C bond. The photocatalytic degradation performance of catalyst firstly increased,then decreased with the increase of calcination temperature and the decrease of catalyst size. The influence of membrane flux firstly decreased,then increased with the increase of calcination temperature and the decrease of catalyst size,and the appropriate catalyst size was 10.272μm. The photocatalytic degradation performance of micron TiO₂/AC catalyst which made by coconut shell activated carbon was higher than that made by lignite activated carbon,and the former had less influence on the membrane flux. The photocatalytic degradation performance of micron TiO₂/AC catalyst was higher than commercial TiO₂,while the influence of membrane flux was lower than commercial TiO₂.