Journal of Guangdong University of Technology ›› 2020, Vol. 37 ›› Issue (01): 42-47.doi: 10.12052/gdutxb.190051

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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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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)

CLC Number: 

  • O483
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