A High Performance Cobalt-Doped ZnO Visible Light Photocatalyst and Its Photogenerated Charge Transfer Properties  

作　　者：Yongchun Lu Yanhong Lin Dejun Wang Lingling Wang Tengfeng Xie Tengfoi Jiang 

机构地区：[1]State Key Laboratory of Theoretical and Cornputational Chemistry [2]State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Cheangchun 130012 China.

出　　处：《Nano Research》2011年第11期1144-1152,共9页纳米研究（英文版）

基　　金：Acknowledgements We are grateful to the National Basic Research Program of China （973 Program, No. 2007CB613303） for financial support. This work was also supported by the National Natural Science Foundation of China （No. 20873053）.

摘　　要：Highly photocatalytically active cobalt-doped ZnO （ZnO：Co） nanorods have been prepared by a facile hydrothermal process. X-ray diffraction, X-ray photoelectron spectroscopy, Raman scattering and UV-vis diffuse reflectance spectroscopy confirmed that the dopant ions substitute for some of the lattice zinc ions, and furthermore, that Co〉 and Co〉 ions coexist. The as-prepared ZnO：Co samples have an extended light absorption range compared with pure ZnO and showed highly efficient photocatalytic activity, only requiring 60 rain to decompose -93% of alizarin red dye under visible light irradiation （λ 〉 420 nm）, The photophysical mechanism of the visible photocatalytic activity was investigated with the help of surface photovoltage spectroscopy. The results indicated that a strong electronic interaction between the Co and ZnO was present, and that the incorporation of Co promoted the charge separation and enhanced the charge transfer ability and, at the same time, effectively inhibited the recombination of photogenerated charge carriers in ZnO, resulting in high visible light photocatalytic activity.高度 photocatalytically 活跃的做钴的 ZnO (ZnO : 公司) nanorods 被一个灵巧的热水的过程准备了。X 光检查衍射， X 光检查光电子光谱学，拉曼散布和紫外力的弥漫的反射光谱学证实掺杂物离子代替一些格子锌离子，并且而且，那 Co2+ 和 Co3+ 离子共存。同样准备的 ZnO : 公司样品让扩大轻吸收与纯 ZnO 和显示出的高度有效的 photocatalytic 活动相比变化，仅仅要求 60 min 在可见轻照耀下面分解 93% 茜素红染料(> 420 nm ) 。可见 photocatalytic 活动的 photophysical 机制在表面 photovoltage 光谱学的帮助下被调查。显示的结果在公司和 ZnO 之间的一个强壮的电子相互作用是在场的，并且公司的加入支持了费用分离并且提高了费用转移能力并且同时，有效地在 ZnO 禁止了 photogenerated 费用搬运人的再结合，导致高可见的轻 photocatalytic 活动。

关 键 词：ZnO：Co visible light irradiation surface photovoltage PHOTOCATALYSIS 

分 类 号：O641.4[理学—物理化学] TQ637.3[理学—化学]