Synthesis, Structural Property, Photophysical Property, Photocatalytic Property of Novel ZnBiErO₄ under Visible Light Irradiation

Materials
Jingfei Luan, Yan Zhuang

Abstract

A novel photocatalyst ZnBiErO₄ was firstly synthesized by solid-state reaction method and its structural and photocatalytic properties were analyzed by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and UV-Vis diffuse reflectance. The results demonstrated that ZnBiErO₄ crystallized with tetragonal crystal structure with space group I41/A. The lattice parameters for ZnBiErO₄ were proved to be a = b = 10.255738 Å and c = 9.938888 Å. The band gap of ZnBiErO₄ was estimated to be about 1.69 eV. Compared with nitrogen doped TiO₂, ZnBiErO₄ showed excellent photocatalytic activities for degrading methyl blue during visible light irradiation. The photocatalytic degradation of methyl blue with ZnBiErO₄ or N-doped TiO₂ as catalyst followed the first-order reaction kinetics. Moreover, the apparent first-order rate constant of ZnBiErO₄ or N-doped TiO₂ was 0.01607 min-1or 0.00435 min-1. The reduction of total organic carbon, formation of inorganic products, such as SO₄2-and NO₃-and the evolution of CO₂ revealed the continuous mineralization of methyl blue during the photocatalytic process. ZnBiErO₄ photocatalyst had great potential to purify textile industry wastewater.

References

Mar 7, 2009·Journal of Environmental Management·V K Gupta, Suhas
Mar 7, 2013·Environmental Science and Pollution Research International·Ankita Khanna, Vidya Shetty K
Jan 10, 2018·Journal of Colloid and Interface Science·Jiabai CaiShunxing Li

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Methods Mentioned

BETA
transmission electron microscopy
electron diffraction
X-ray

Software Mentioned

Cambridge serial total energy package ( CASTEP )
RIETAN
Studio
Material

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