作　　者： ; ; ; ;

机构地区： 华南理工大学环境科学与工程学院工业聚集区污染控制与生态修复教育部重点实验室

出　　处： 《化工进展》 2010年第6期1071-1074,1079,共5页

摘　　要： 分别以MnSO4.H2O和MnC2O4.4H2O为锰源,采用水热法制备了锰掺杂的Mn-TiO2光催化剂,并采用X射线衍射、紫外-可见光漫反射光谱等技术对样品进行了表征。以罗丹明B的光催化降解为模型反应,考察了不同锰源、锰掺杂量对催化剂光催化性能的影响。结果表明,所有制备的Mn-TiO2均表现为锐钛矿相,Mn的掺杂抑制了TiO2晶粒生长,且以MnSO4.H2O为锰源制备的Mn-TiO2粒径略小于以MnC2O4.4H2O为锰源制备的样品,所有Mn-TiO2催化剂的光响应范围拓宽至可见光区域,对罗丹明B具有明显的可见光降解效果,并且以MnSO4.H2O为锰源的催化剂具有较高的光催化活性。 Mn-doped TiO2 nanocrystal photocatalysts,Mn-TiO2-S and Mn-TiO2-C,were prepared by simple hydrothermal synthesis using MnSO4.H2O and MnC2O4.4H2O as manganese source,respectively. The catalysts were characterized by X ray diffraction and UV-vis diffuse reflectance spectroscopy,their photocatalytic activity for rhodamine B degradation was evaluated,and effects of manganese source and Mn doping amount were investigated. All the Mn-TiO2 showed an anatase crystallite structure and the Mn doping inhibited the growth of TiO2 particles. The particle size of Mn-TiO2-S was smaller than that of Mn-TiO2-C. The absorption edge of Mn-TiO2 shifted to the visible light region upon doping. The Mn-doped TiO2 showed obvious photocatalytic activity for rhodamine B degradation under visible light irradiation,and Mn-TiO2-S showed higher photocatalytic activity than the undoped TiO2 and Mn-TiO2-C.

关 键 词： 光催化剂 锰掺杂 可见光响应 二氧化钛

领　　域： [一般工业技术]