高等学校化学学报 ›› 2018, Vol. 39 ›› Issue (5): 996-1002.doi: 10.7503/cjcu20170601

• 物理化学 • 上一篇    下一篇

Bi2WO6/TiO2纳米复合材料对乙烯的光催化降解

王海丹, 王丽, 徐梅, 黄丽晨, 宋贤良   

  1. 华南农业大学食品学院, 广州 510642
  • 收稿日期:2017-09-04 出版日期:2018-04-21 发布日期:2018-04-21
  • 作者简介:

    联系人简介: 宋贤良, 男, 博士, 副教授, 主要从事纳米材料及其在食品中的应用研究. E-mail: songxl2000@163.com

  • 基金资助:
    国家自然科学基金(批准号: 31371855)、 广东省现代农业产业共性技术创新团队项目(批准号: 2016LM2154)和广州市科技计划项目(批准号: 2014J4100150)资助.

Synthesis of Bi2WO6/TiO2 Nanocomposites for the Photocatalytic Degradation of Ethylene

WANG Haidan, WANG Li, XU Mei, HUANG Lichen, SONG Xianliang*   

  1. College of Food Science, South China Agricultural University, Guangzhou 510642, China
  • Received:2017-09-04 Online:2018-04-21 Published:2018-04-21
  • Contact: SONG Xianliang
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.31371855), the Team Project of Modern Agricultural Generic Techono-logy Innovation of Guangdong Province, China(No.016LM2154) and the Science and Technological Project of Guangzhou City, China(No.2014J4100150).

摘要:

采用乙二醇溶剂热法制备了Bi2WO6/TiO2纳米复合材料, 并利用X射线衍射仪(XRD), 透射电子显微镜(TEM), 扫描电子显微镜(SEM)和傅里叶变换红外光谱仪(FTIR)对其进行了表征. 结果表明, 纳米TiO2附着在Bi2WO6表面, 通过两者表面基团的相互作用形成了异质结构; 与单一Bi2WO6相比, Bi2WO6/TiO2的晶粒尺寸更小, 比表面积更大, 具有更高的光催化活性. 对乙烯的光催化降解结果表明, Bi2WO6/TiO2在可见光和模拟太阳光下均表现出较强的光催化降解乙烯活性, 在可见光下催化降解乙烯的速率常数(K'值)可达9.312×10-4 min-1, 相比Bi2WO6和TiO2分别提高了89.34%和884.25%.

关键词: 纳米复合材料, Bi2WO6, TiO2, 乙烯, 可见光催化

Abstract:

Bi2WO6/TiO2 nanocomposites were synthesized via solvent thermal method and characterized using X-ray powder diffractometer(XRD), scanning electron microscope(SEM), transmission electron microscope(TEM) and Fourier transform infared spectrometer(FTIR). The results show that TiO2 nanoparticles can be attached to the surface of Bi2WO6 through the interaction of surface groups, thus leading to the hetergeneous structure. Moreover, the Bi2WO6/TiO2 nanocomposites have smaller grain size and higher specific surface area compared with single Bi2WO6 nanoparticles, which can be contributed to the reinforcement of photocatalytic activity under visible light irradiation. Experiments on degradation of ethylene indicated that Bi2WO6/TiO2 composites exhibited excellent photocatalytic performance under both simulated solar light irradiation and visible light irradiation. The rate constant K' of Bi2WO6/TiO2 could reach up to 9.312×10-4 min-1 under visible light irradiation, which increased by 89.34% and 884.25% compared with sole Bi2WO6 and TiO2, respectively.

Key words: Nanocomposite, Bi2WO6, TiO2, Ethylene, Visible-light-induced photocatalysis

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