广东工业大学学报 ›› 2020, Vol. 37 ›› Issue (01): 42-47.doi: 10.12052/gdutxb.190051

• 综合研究 • 上一篇    下一篇

溶胶-凝胶法制备BiFeO3:Y3+纳米粉末及其光催化性能研究

王家玺, 罗莉, 贠蕊, 李小芬, 王银海, 张伟   

  1. 广东工业大学 物理与光电工程学院, 广东 广州 510006
  • 收稿日期:2019-04-08 出版日期:2020-01-25 发布日期:2019-12-10
  • 通信作者: 罗莉(1968-),女,教授,硕士生导师,主要研究方向为光电功能材料,E-mail:luoli@gdut.edu.cn E-mail:luoli@gdut.edu.cn
  • 作者简介:王家玺(1994-),女,硕士研究生,主要研究方向为光电功能材料
  • 基金资助:
    国家自然科学基金资助项目（11574058）；广州市科技计划项目（201607010102）

Synthesis of BiFeO3: Y3+ Nanostructure by Sol-gel Method and Their Photocatalytic Activity

Wang Jia-xi, Luo Li, Yun Rui, Li Xiao-fen, Wang Yin-hai, Zhang Wei   

  1. School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China
  • Received:2019-04-08 Online:2020-01-25 Published:2019-12-10

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摘要： 多功能铁电材料是近年来的热门材料，为了研究铁电材料在光催化中的应用，通过溶胶-凝胶法在空气氛围下制备了铁酸铋（BiFeO3）和不同Y3+掺杂浓度（Bi1–xYxFeO3）的纳米粉体材料。通过X射线衍射仪（X-ray diffraction，XRD），扫描电镜（scanning electron microscopy，SEM）和X射线光电子能谱（X-ray photoelectron spectroscopy，XPS）表征了样品的结构、形貌和表面化学组成等物理化学性质。并利用分光光度计和光化学反应实验测试了样品的吸收谱和在紫外灯照射下的光催化效果。研究发现，掺杂Y3+不会改变晶格结构，但是减小了晶粒尺寸和禁带宽度。同时，根据O 1s的XPS窄谱扫描的拟合分析发现，引入Y3+可以有效提高氧空位的含量，而氧空位可以降低空穴-电子对的复合率，提高载流子利用率。因此，掺杂Y3+可以提高BiFeO3的光催化效率，使其成为一种很有潜力的光催化材料。

关键词: 铁电材料, 光催化, X射线光电子能谱

Abstract: Multi-functional ferroelectric materials are the major topic of discussion in recent years. In order to study the photocatalytic property of ferroelectric materials, BiFeO3 and Bi1-xYxFeO3 nanostructure were prepared by sol-gel method. The crystal structure, morphology, chemical composition and other physiochemical properties of the samples were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). In addition, the ultraviolet-visible spectrophotometer and photochemical reactions instrument were applied to study the absorption and the photocatalytic property of the samples. The results show that doping of Y3+ can reduce the grain size and the forbidden band gap without changing the lattice structure. Also, according to the fitting analysis of XPS narrow spectrum of O 1s, it is found that the content of oxygen vacancies were increased after Y3+ doping. The oxygen vacancies can reduce the recombination rate of hole-electron pairs so that the utilization of carriers is improved. Therefore, the doping of Y3+ can increase the photocatalytic efficiency of BiFeO3, and it can be a promising photocatalytic material.

Key words: ferroelectric materials, photocatalytic, X-ray photoelectron spectroscopy (XPS)

中图分类号: 

  • O483
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