Synthesis of Mn-N-Codoped TiO2 Photocatalyst and Its Photocatalytic Reactivity Under Visible Light Irradiation
Visible-light responsible Mn-N-codoped TiO2 nanocrystal photocatalysts were synthesized for the first time by a simple hydrothermal synthesis method. X-ray powder diffraction (XRD)measurement indicated that all of the photocatalysts have an anatase crystallite structure and the increase of the doping concentration had less effect on the structure and particle size. Comparing to N-doped TiO2, a shift of the absorption edge of Mn-N-codoped TiO2 to a lower energy and a stronger absorption in the visible light region were observed. The Mn-N-codoped TiO2 showed a higher photocatalytic reactivity than undoped TiO2 and N-doped TiO2 for the photodegradation of rhodamine B (RhB) under visible light irradiation. The doping concentration had an optimal value,according to the highest photocatalytic activity. This suggested that Mn and N codoping has important effects on the improvement of visible-light responsible photocatalytic activity.
Mn-N-codoped TiO2 Photocatalyst Visible light response
Yun HU Xia ZHANG Chaohai WEI
College of Environmental Science and Engineering, South China University of Technology, Guangzhou, China
国际会议
10th International Symposium on Eco-Materials Processing and Design(第10届国际生态材料加工与设计研讨会)
西安
英文
683-686
2009-01-13（万方平台首次上网日期，不代表论文的发表时间）