Fabrication of Bi³⁺-doped ZnO with enhanced photocatalytic performance

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• 作者：Jun bo Zhong ; ^{junbozhong@163.com} ; Jian zhang Li ; Yan Lu ; Xi yang He ; Jun Zeng ; Wei Hu ; Yue cheng Shen
• 关键词：ZnO ; Photocatalytic performance ; Doping ; Bi
• 刊名：Applied Surface Science
• 出版年：2012
• 期刊代码：6_01694332
• 类别：ms
• 出版时间：15 March, 2012
• 卷：258
• 期：11
• 页码：4929-4933
• 文件大小：1418 K

摘要

ZnO and Bi³⁺-doped ZnO photocatalysts with different molar ratio of Bi/Zn were prepared by a parallel flaw precipitation method. The photocatalysts prepared were characterized by BET surface area, X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopic techniques (XPS), UV/Vis diffuse reflectance spectroscopy (DRS) and surface photovoltage spectroscopy (SPS), respectively. The results show that doping Bi into ZnO increases the BET surface area. The XRD spectra of the Bi³⁺-doped ZnO photocatalysts calcined at 573 K show only the characteristic peaks of wurtzite-type. Doping Bi³⁺ into ZnO influences the response to the light and the photoinduced charge separation rate, changes the morphology of ZnO and induces binding energy value of Zn2p_3/2 shift. The photocatalytic activity of Bi³⁺-doped ZnO photocatalysts for decolorization of methyl orange (MO) solution was evaluated, of all the photocatalysts prepared, the Bi³⁺-doped ZnO with 5%Bi possesses the best photocatalytic activity among the experimented compositions and the possible reason was discussed.