核壳结构TiO_2/WO_3粉体的合成与性能研究

Study on synthesis and property of core-shelled structure titanium dioxide/tungsten oxide powder

以钛酸丁酯为原料,采用低温水解法合成纳米金红石型TiO2颗粒,然后用钨酸铵分解包覆在TiO2表面,制得核壳结构TiO2/WO3复合物样品。并将复合物样品进行X射线衍射(XRD)、紫外可见漫反射(DRS)、荧光(FS)表征。结果表明,TiO2/WO3复合物的紫外漫反射率随WO3担载浓度的增加而降低,复合粉体的吸光性能增强,光吸收范围红移;煅烧钨酸铵温度增高而TiO2/WO3吸光性能减弱;TiO2/WO3复合物的荧光光谱强度随WO3担载浓度的增加而减小,发光性能减弱。

Originated from （C4H9O） 4Ti, nano-rutile TiO2 was synthesized by low temperature hydrolytic process in this paper. After being prepared face of TiO2 ,TiO2/WO3 were characterized by decomposing ammonium tungstate and covering on the surby means of thermogravimetric and differential scanning calorimeter（ TG-DSC ）, X-ray diffraction （ XRD ） , UV-vis diffuse reflectance （ DRS ） , fluorescence spectrum （FS）. Results showed that with the increase of the supported concentration of WO3, the reflectance of DRS and the fluorescence spectrum intensity of TiO2/WO3 decreased accordingly, which indicated the powder＇s increase in light absorbance and the decrease in luminescence respectively.