| Photocatalytic oxidation activity of titanium dioxide film enhanced by Mn non-uniform doping |
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| 摘 要： | 1 Introduction Heterogeneous photocatalysis is an effective technique for reducing the concentration of pollutants at low concentration. It has been demonstrated that almost all organics can be oxidized to generate carbon dioxide, water and simple mineral…
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| 关 键 词： | 光催化剂 TiO2 Mn 掺杂 薄膜 |
| 收稿时间： | 2006-02-20 |
| 修稿时间： | 2006-03-26 |
Photocatalytic oxidation activity of titanium dioxide film enhanced by Mn non-uniform doping |
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| ZHANG Kai-jian,XU Wei,LI Xin-jun,ZHENG Shao-jian,XU Gang,WANG Jian-hua. Photocatalytic oxidation activity of titanium dioxide film enhanced by Mn non-uniform doping[J]. Transactions of Nonferrous Metals Society of China, 2006, 16(5): 1069-1075. DOI: 10.1016/S1003-6326(06)60379-8 |
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| Authors: | ZHANG Kai-jian XU Wei LI Xin-jun ZHENG Shao-jian XU Gang WANG Jian-hua |
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| Affiliation: | 1. College of Economy, Industry and Business Management, Chongqing University, Chongqing 400044, China;2. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China;3. Panzhihua Iron & Steel Research Institute, Panzhihua Iron & Steel Ltd Co, Panzhihua 617000, China;4. 4. No.719 Research Institute of China Shipbuilding Industry Corporation, Wuhan 430064, China;1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430000, China;2. State Key Laboratory of Advanced Technology for Float Glass, Bengbu Design & Research Institute for Glass Industry, Bengbu 233000, China;3. School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116000, China;1. NanoProject, Facultad de Ciencias Exactas y Tecnología, Universidad Nacional de Tucumán, Avenida Independencia 1800, San Miguel de Tucumán, 4000 Argentina;2. Laboratorio de Materiales Funcionales a Nanoescala, Departamento de Ciencias de los Materiales, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Beauchef 851, Santiago, Chile;3. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina;4. Laboratorio de Nanomateriales y Propiedades Dieléctricas (LNPD), Facultad de Ciencias Exactas y Tecnología, Universidad Nacional de Tucumán, Avenida Independencia 1800, San Miguel de Tucumán, 4000 Argentina;5. Instituto de Física del Litoral, UNL, CONICET, FIQ, Güemes 3450, Santa Fe, S3000GLN Argentina;6. Laboratorio de Física del Sólido (LAFISO), Departamento de Física, Facultad de Ciencias Exactas y Tecnología, Universidad Nacional de Tucumán, Argentina;1. University of Perugia, Civil and Environmental Engineering Department, UdR INSTM, Strada di Pentima 4, 05100 Terni, Italy;2. INTEMA – Instituto de Investigaciones en Ciencia y Tecnología de Materiales, Facultad de Ingeniería, Universidad Nacional de Mar del Plata, J. B. Justo 4302, Mar del Plata, Argentina;3. Instituto de Ciencia y Tecnología de Polímeros, ICTP-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain;1. NanoLAB, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland;2. Solar Energy and Building Physics Laboratory (LESO-PB), EPFL, CH-1015 Lausanne, Switzerland;1. Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 10029, China;2. School of Chemistry, Beihang University, 37 Xueyuan Road, Haidian District, Beijing 100191, China;3. School of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis, OR 97331, United States |
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| Abstract: | The thin films of TiO2 doped by Mn non-uniformly were prepared by sol-gel method under process control. Each film was characterized by XPS, SEM, UV-vis spectrophotometry and electrochemistry workstation analysis. The activity of the photocatalyst was evaluated by the kinetics of photocatalytic degradation of aqueous methyl orange under the UV radiation. The results show that Mn non-uniform doping evidently enhances the photocatalytic activity of TiO2 thin film. In 80 min, the degradation rates of aqueous methyl orange are 62%, 12% and 34% for Mn non-uniformly doped film (0.7%), the uniformly doped film (0.7%) and pure titanium dioxide film, respectively. The characteristic of PN junction in the film was proved by electrochemical characterization. A mechanism for enhanced photocatalytic activity of Mn non-uniformly doped titanium dioxide film was discussed based on the effective separation of the photon-generated carrier because of the existence of the PN junction. |
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| Keywords: | photocatalyst TiO2 Mn non-uniform doping film |
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