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题名: Synthesis and Evaluation of Visible-Light Photocatalyst: Nitrogen-Doped TiO2/Bi2O3 Heterojunction Structures
作者: Fan, Xiaoyun; Hua, Ning; Jia, Hanzhong; Zhu, Yunqing; Wang, Zhen; Xu, Jian; Wang, Chuanyi
关键词: (N-TiO2)/(Bi2O3) Composite ; Photocatalytic ; Heterojunction ; Charge Transfer ; 2,4-Dichlorophenol.
刊名: SCIENCE OF ADVANCED MATERIALS
发表日期: 2014
DOI: 10.1166/sam.2014.1962
卷: 6, 期:8, 页:1892-1899
收录类别: SCI
摘要: N-TiO2/Bi2O3 composites have been successfully prepared by a simple coupling method and evaluated in detail. These composites represent a potential new class of heterojunction-structured photocatalysts wherein the enhanced light absorption properties of N-TiO2 are anticipated to couple with the observed benefits of composite TiO2/Bi2O3 systems. The composites were characterized by powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL), N-2-adsorption desorption, diffuse reflectance spectroscopy (DRS), and scanning electron microscopy (SEM). It was found that composites with low Bi2O3 content display enhanced photocatalytic activity for decomposition of 2,4-dichlorophenol (2,4-DCP) under visible light irradiation, which is attributed to a synergistic effect between the two composite components and the flow of holes and electrons through the heterojunction. The PL spectroscopy was adopted to analyze the physical properties of the photogenerated carriers and it was found that the separation of photogenerated carriers of Bi2O3 has been largely promoted after being coupled with N-TiO2. Significantly, the enhanced performance demonstrated the importance of evaluating new composite photocatalysts. It would be helpful in designing and constructing high efficiency heterogeneous semiconductor photocatalyst with the purpose of enhancing activity by coupling suitable wide and narrow band-gap semiconductors, which is inspiring for the practical environmental purification.
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内容类型: 期刊论文
URI标识: http://ir.xjipc.cas.cn/handle/365002/3751
Appears in Collections:中国科学院特殊环境功能材料与器件重点试验室_期刊论文

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作者单位: Chinese Acad Sci, Key Lab Funct Mat & Devices Special Environm, Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, Urumqi 830011, Peoples R China;Xinjiang Acad Safety Sci & Technol, Urumqi 830002, Xinjiang, Peoples R China

Recommended Citation:
Fan, Xiaoyun,Hua, Ning,Jia, Hanzhong,et al. Synthesis and Evaluation of Visible-Light Photocatalyst: Nitrogen-Doped TiO2/Bi2O3 Heterojunction Structures[J]. SCIENCE OF ADVANCED MATERIALS,2014,6(8):1892-1899.
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