Abstract: 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.

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。