掺钒二氧化钛中空微球的制备和光催化性能研究

以聚苯乙烯微球为模板，钛酸四丁酯为前驱体制备了掺钒TiO₂中空微球，并用FT-IR，SEM，TEM，XRD，UV-Vis等技术对样品进行了表征. 研究结果表明，掺杂少量钒到体系中，TiO₂微球形貌没有发生明显变化，得到壳层厚度约为20~30nm的TiO₂中空微球. 但钒的引入使得TiO₂中空微球从锐钛矿相向金红石相转变. 随着掺钒量的增加，TiO₂中空微球吸收边向长波方向移动增强. 光催化降解甲基橙溶液实验结果表明，掺杂1.0%钒的TiO₂中空微球表现出更好的光催化性能.

Synthesis and Photocatalytic Activity of Vanadium Doped Titania Hollow Microspheres

Vanadium doped titania hollow microspheres were successfully prepared using polystyrene latex particles as template and using organmetallic Ti (Ⅳ) as precursor. The resulting samples were characterized by FT-IR,SEM,TEM, XRD and UV-Vis DRS. The results show that the morphology of titania hollow micro spheres do not exhibit remarkable change when adding low concentration of vanadium. The wall thickness of these hollow microspheres is in the range from 20nm to 30nm. The vanadium promotes the phase transformation of TiO₂ hollow microsphere from anatase to rutile phase. With increasing concentration of vanadium, the adsorption edge of as-prepared titania hollow microspheres show stronger absorbance of light with longer wavelength. The moderately vanadium doped titania hollow microspheres（1.0%）exhibit better photocatalytic activity for the decomposition of methyl orange in aqueous solution.