BiOBr/BiOI复合体的制备及可见光催化性能

Preparation and visible light photocatalytic property of BiOBr /BiOI composite

以硝酸铋、碘化钾、溴化钠和聚乙二醇-400为主要原料,利用水热法制备出具有较小粒径的BiOBr/BiOI复合体,通过扫描电子显微镜(SEM)、X射线衍射(XRD)、紫外可见漫反射(DRS)等测试手段对样品的形貌、物相组成进行了表征。以罗丹明B为模拟污染物,研究了可见光下所制备样品的光催化性能。结果表明:BiOBr/BiOI复合体的光催化性能高于单一的BiOBr和BiOI,光照80 min后罗丹明B的降解效率可达95.6%。

Smaller particle size BiOBr/BiOI composite was prepared via a hydrothermal method using bismuth nitrate,sodium bro-mide,potassium iodide and polyethylene glycol-400 as main raw materials. The morphology and phase composition were character-ized by Scanning electron microscope（SEM）,X-ray diffraction（XRD）,UV-vis diffuse reflectance spectroscopy（DRS）. With Rho-damine B as simulated pollutant,the photocatalytic performance of prepared samples was investigated under visible light. The results showed that photocatalytic performance of the BiOBr/BiOI composite was higher than single BiOBr and BiOI,the degradation rate of Rhodamine B is about 95. 6%after 80 min irradiation by visible light.