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首页> 外文期刊>Journal of Materials Research >A C_3N_4/Bi_2WO_6 organic-inorganic hybrid photocatalyst with a high visible-light-driven photocatalytic activity
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A C_3N_4/Bi_2WO_6 organic-inorganic hybrid photocatalyst with a high visible-light-driven photocatalytic activity

机译:具有高可见光驱动光催化活性的C_3N_4 / Bi_2WO_6有机-无机杂化光催化剂

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摘要

C_3N_4/Bi_2WO_6 heterojunction photocatalysts were successfully synthesized using consecutive hydrothermal and calcination processes. These photocatalysts were characterized using x-ray diffraction, scanning electron microscopy, transmission electron microscopy, ultraviolet-visible diffuse reflectance spectroscopy, x-ray photoelectron spectroscopy, and photoluminescence measurements. The results of these measurements indicated that the Bi_2WO_6 nanoparticles were approximately 30-50 nm and uniformly distributed on the surface of C_3N_4 lamellar structures. The 20% C_3N_4/Bi_2WO_6 displayed enhanced visible-light absorption from 432 nm to 468 nm. Photocatalytic tests also revealed that the 20% C_3N_4/Bi_2WO_6 photocatalyst exhibited significantly enhanced photocatalytic activity compared to that of pure C_3N_4 and Bi_2WO_6 under irradiation by visible light (λ > 420 nm). Furthermore, the excellent photocatalytic efficiency of the 20% C_3N_4/Bi_2WO_6 photocatalyst was determined to be related to the formation of C_3N_4/Bi_2WO_6 heterojunctions, and their presence was found to be generally beneficial for the separation of photogenerated electron-hole pairs.
机译:C_3N_4 / Bi_2WO_6异质结光催化剂是采用连续水热法和煅烧法成功合成的。使用X射线衍射,扫描电子显微镜,透射电子显微镜,紫外-可见漫反射光谱,X射线光电子光谱和光致发光测量来表征这些光催化剂。这些测量结果表明,Bi_2WO_6纳米粒子约为30-50 nm,并且均匀分布在C_3N_4层状结构的表面上。 20%的C_3N_4 / Bi_2WO_6显示出从432 nm到468 nm的可见光吸收增强。光催化测试还显示,在可见光(λ> 420 nm)照射下,与纯C_3N_4和Bi_2WO_6相比,20%C_3N_4 / Bi_2WO_6光催化剂表现出显着增强的光催化活性。此外,确定20%C_3N_4 / Bi_2WO_6光催化剂的优异光催化效率与C_3N_4 / Bi_2WO_6异质结的形成有关,发现它们的存在通常有利于光生电子-空穴对的分离。

著录项

  • 来源
    《Journal of Materials Research》 |2016年第6期|713-720|共8页
  • 作者单位

    Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China;

    Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China;

    Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China;

    Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China;

    Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China;

    Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China;

    Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China;

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  • 正文语种 eng
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