上海大学学报(自然科学版) ›› 2020, Vol. 26 ›› Issue (6): 954-962.doi: 10.12066/j.issn.1007-2861.2103

• 研究论文 • 上一篇    下一篇

Bi2WO6/TiO2纳米带的制备及其可见光催化性能

唐燕, 周荻雯, 朱影, 乔丹丹, 浦娴娟, 焦正(), 程伶俐   

  1. 上海大学 环境与化学工程学院, 上海 200444
  • 收稿日期:2018-10-12 出版日期:2020-12-31 发布日期:2020-12-29
  • 通讯作者: 焦正 E-mail:zjiao@shu.edu.cn
  • 作者简介:焦正(1972—), 男, 教授, 博士生导师, 博士, 研究方向为纳米敏感材料和纳米器件. E-mail: zjiao@shu.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(21671128);国家自然科学基金资助项目(21671130);国家自然科学基金资助项目(41807304);国家自然科学基金资助项目(21805181);国家博士后科学基金资助项目(2017M611529)

Synthesis of Bi2WO6/TiO2 nanobelts for development of visible-light-driven photocatalysts and their photocatalytic properties

TANG Yan, ZHOU Diwen, ZHU Ying, QIAO Dandan, PU Xianjuan, JIAO Zheng(), CHENG Lingli   

  1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
  • Received:2018-10-12 Online:2020-12-31 Published:2020-12-29
  • Contact: JIAO Zheng E-mail:zjiao@shu.edu.cn

摘要:

以 TiO2 P25纳米颗粒为原料, 通过碱-水热法制备TiO2纳米带,再采用水热法成功制备出Bi2WO6/TiO2纳米带材料.利用X射线衍射仪(X-ray diffraction, XRD)、扫描电子显微镜 (scanningelectron microscope, SEM)以及透射电子显微镜 (transmission electronmicroscope, TEM)分别对该材料的物相和形貌进行了分析,并研究了其在可见光下的光催化的性能和催化机理. 研究结果表明:制备出的Bi2WO6纳米带通过分子间作用力成功负载在TiO$_{2}$纳米带上.制备出的Bi2WO6/TiO2在可见光下具有优越的光催化性能,这归因于材料较好的光生电子-空穴分离效率以及材料特定的物理性质,不仅为光催化反应提供了丰富的活性位点, 还有效促进了电子的轴向迁移率.

关键词: Bi2WO6/TiO2纳米带, 分离效率, 物理性质, 活性位点

Abstract:

TiO2 P25 nanoparticles were used as raw materials to synthesise TiO2 nanobelts by the alkaline hydrothermal method. The Bi2WO6/TiO2 nanobelts were successfully synthesised by the hydrothermal method using the TiO2 nanobelts. X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques were used to study the morphology and structure of the synthesised hybrid material. The experimental results revealed that the Bi2WO6 nanosheets could be successfully loaded onto the surface of the TiO2 nanobelts (attachment via intermolecular interactions). The photocatalytic performance of the Bi2WO6/TiO2 composite material and the mechanism of catalysis were investigated under visible light irradiation. The results showed that the prepared Bi2WO6/TiO2 hybrid material had excellent photocatalytic properties. The enhanced photocatalytic activity could be attributed to the excellent photogenerated electron-hole pair separation (effective charge separation) and specificity of the composite material. The effective charge separation not only generated abundant active sites for photocatalytic reactions but also effectively promoted the axial mobility of electrons.

Key words: Bi2WO6/TiO2 nanobelt, separation efficiency, physical property, active sites

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