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无机材料学报

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2020 , Vol. 35 >Issue 3: 324 - 328

DOI: https://doi.org/10.15541/jim20190389

研究论文

可见光下Bi2WO6纳米片高效光降解四环素的机理研究

  • 魏鑫 ,
  • 卢占会 ,
  • 王路平 ,
  • 方明
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  • 1. 华北电力大学 数理学院, 北京 102206
    2. 华北电力大学 环境科学与工程学院 资源环境系统优化教育部重点实验室, 北京 102206
魏 鑫(1996-), 女, 硕士研究生. E-mail:weixin@ncepu.edu.cn

收稿日期: 2019-07-26

  修回日期: 2019-10-24

  网络出版日期: 2019-10-25

基金资助

国家自然科学基金(U1607102);国家自然科学基金(21377132);国家自然科学基金(91326202);中央高校基本科研业务费专项资金(2019MS040)

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Mechanism Study of Tetracycline High Efficient Photodegradation by Bi2WO6 Nanosheets under Visible Light Irradiation

  • Xin WEI ,
  • Zhanhui LU ,
  • Luping WANG ,
  • Ming FANG
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  • 1. School of Mathematics and Physics, North China Electric Power University, Beijing 102206, China
    2. MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
WEI Xin(1996-), female, Master candidate. E-mail: weixin@ncepu.edu.cn

Received date: 2019-07-26

  Revised date: 2019-10-24

  Online published: 2019-10-25

Supported by

National Natural Science Foundation of China(U1607102);National Natural Science Foundation of China(21377132);National Natural Science Foundation of China(91326202);Fundamental Research Fund for the Central Universities(2019MS040)

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摘要

作为一种窄带隙半导体材料, Bi2WO6在光催化降解有机污染物上具有很大的应用潜力。研究采用水热法合成了Bi2WO6纳米片, 并在可见光照射下研究其对四环素的光催化降解。利用XRD、FESEM、TEM、吸收光谱等对材料进行结构和形貌的表征。实验发现, 在pH=8的四环素溶液中加入50 mg Bi2WO6纳米片, 可见光照射130 min 后, 85%的四环素（50 mL, 50 mg/L）被降解。实验还研究了Bi2WO6纳米片光电化学性质, 通过加入不同的自由基捕获剂研究了光催化降解四环素的反应机理。结果表明, Bi2WO6纳米片具有较高的电子密度和电子空穴分离效率是其具有良好光催化性能的原因。

关键词： Bi2WO6纳米片; 四环素; 光催化; 可见光

本文引用格式

魏鑫 , 卢占会 , 王路平 , 方明 . 可见光下Bi2WO6纳米片高效光降解四环素的机理研究[J]. 无机材料学报, 2020 , 35(3) : 324 -328 . DOI: 10.15541/jim20190389

Abstract

As a narrow band gap semiconductor, Bi2WO6 has great application potential in photo-degradation of organic pollutants, such as tetracycline. In present work, Bi2WO6 nanosheets were successfully synthesized by a hydrothermal method and the photo-degradation of tetracycline under visible light irradiation were investigated. XRD, FESEM, TEM and absorption spectra were used to characterize the structure and morphology of the material. It was found that when adding 50 mg Bi2WO6 nanosheets into 50 mL of tetracycline solution at pH=8, 85% tetracycline (50 mL, 50 mg/L) was photodegraded within 130 min. The photoelectron-chemical experiments and free radical capture experiments were performed to explore the photo-degradation mechanism. The results show that good photocatalytic performance of Bi2WO6 nanosheets are ascribed to the high electron density and photoelectron-hole separation efficiency.

Key words： Bi2WO6 nanosheets; tetracycline; photocatalytic; visible light

参考文献

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