TiO_(2)负载硅铝陶瓷介孔球对甲基橙吸附和光催化降解的研究

Adsorption and Photocatalytic Degradation of Methyl Orange by TiO_(2) Supported Silica-Alumina Ceramic Mesoporous Spheres

以自制硅铝陶瓷介孔球为基体,经溶胶凝胶法制备TiO_(2)溶胶并将其负载于硅铝陶瓷介孔球表面,用于甲基橙溶液的吸附和光催化降解,再利用扫描电子显微镜、X射线衍射仪、傅里叶变换红外光谱仪和可见分光光度计对样品的表观形貌、晶体结构、吸附和光催化性能等进行表征和测定。研究结果表明:TiO_(2)是以粗糙度较高的多层膜包覆于硅铝陶瓷介孔球表面且TiO_(2)为锐钛矿晶型;在黑暗条件下,硅铝陶瓷介孔球和TiO_(2)负载硅铝陶瓷介孔球对甲基橙仅起到吸附作用,且两者的吸附性能较接近;但在紫外光照条件下,TiO_(2)负载硅铝陶瓷介孔球对甲基橙除有吸附作用外还表现出较好的光催化降解活性。

TiO_(2) sol was prepared by sol-gel method and supported on the surface of silica-alumina ceramic mesoporous spheres for the adsorption and photocatalytic degradation of methyl orange solution.The apparent morphology,crystal structure,adsorption and photocatalytic properties of the samples were characterized and detected by environmental scanning electron microscopy,X-ray diffractometer,Fourier transform infrared spectrometer and visible spectrophotometer.The results showed that the TiO_(2) was coated on the surface of silica-alumina ceramic mesoporous spheres with high roughness coating and the TiO_(2) was anatase crystal.In the dark condition,silica-alumina ceramic mesoporous spheres and TiO_(2)^(-) supported silica-alumina ceramic mesoporous spheres only had adsorption effect on methyl orange,with similar adsorption performance.However,under ultraviolet light condition,TiO_(2) supported silica alumina ceramic mesoporous spheres not only had adsorption effect on methyl orange,but also showed good photocatalytic degradation activity.