中文摘要：

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。

英文摘要：

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.