Ag@AgCl修饰TiO_(2-x)C_x光催化剂的制备及其可见光降解污染物性能  

Preparation of a Ag@AgCl-Modified TiO_(2-x)C_x Photocatalyst and Its Performance for Degradation of Pollutants under Visible Light

作　　者：聂龙辉[1] 胡瑶[1] 张旺喜[1] 

机构地区：[1]湖北工业大学化学与环境工程学院,武汉430068

出　　处：《物理化学学报》2012年第1期154-160,共7页Acta Physico-Chimica Sinica

基　　金：湖北工业大学博士启动基金(BSQD0826)资助项目~~

摘　　要：以钛酸丁酯和葡萄糖为原料用水热法制备了碳掺杂二氧化钛,再进一步对其进行Ag@AgCl表面修饰.用X射线衍射(XRD),X射线光电子能谱(XPS),透射电镜(TEM),BET比表面仪和紫外-可见(UV-Vis)漫反射光谱等手段对样品进行测试表征;在可见光辐射下(λ>420nm),以甲基橙和苯酚溶液的光催化降解实验来评价样品的活性.结果表明:经Ag@AgCl修饰后,样品的粒径增大,比表面积减小,对可见光的响应增强;可见光光催化效率有大幅度提高,对甲基橙和苯酚的降解效率分别是修饰前的5.5和3.4倍,且光催化剂经三次循环使用后活性基本保持不变.C-doped TiO2 was prepared from butyl titanate and glucose by a hydrothermal method.The prepared C-doped TiO2 was further modified with [e-mail] obtained samples were characterized by X-ray diffraction （XRD）,X-ray photoelectron spectroscopy （XPS）,transmission electron microscopy （TEM）,BET surface area analysis,and UV-Vis diffuse reflectance spectroscopy.The photocatalytic activity of the samples was evaluated by the degradation of methyl orange and phenol under the visible light irradiation （λ420 nm）.After modification with Ag@AgCl,the C-doped TiO2 samples had a larger particle size and smaller surface area with enhanced response to visible light and greatly improved visible-light photocatalytic activity.The degradation rates of methyl orange and phenol over Ag@AgCl/TiO2-xCx were 5.5 and 3.4 times as large as those over TiO2-xCx,respectively.The photocatalytic activity of Ag@AgCl/TiO2-xCx under visible light remained almost unchanged after three cycles.

关 键 词：可见光活性 银-氯化银 碳掺杂二氧化钛 等离子体共振 甲基橙 苯酚 

分 类 号：O643.36[理学—物理化学]