Synthesis, crystal structure, photodegradation kinetics and photocatalytic activity of novel photocatalyst ZnBiYO4

Journal of Environmental Sciences (China)
Yanbing Cui, Jingfei Luan

Abstract

ZnBiYO4 was synthesized by a solid-state reaction method for the first time. The structural and photocatalytic properties of ZnBiYO4 were characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy and UV-Vis diffuse reflectance. ZnBiYO4 crystallized with a tetragonal spinel structure with space group I41/A. The lattice parameters for ZnBiYO4 were a=b=11.176479Å and c=10.014323Å. The band gap of ZnBiYO4 was estimated to be 1.58eV. The photocatalytic activity of ZnBiYO4 was assessed by photodegradation of methyl orange under visible light irradiation. The results showed that ZnBiYO4 had higher catalytic activity compared with N-doped TiO2 under the same experimental conditions using visible light irradiation. The photocatalytic degradation of methyl orange with ZnBiYO4 or N-doped TiO2 as catalyst followed first-order reaction kinetics, and the first-order rate constant was 0.01575 and 0.00416 min(-1) for ZnBiYO4 and N-doped TiO2, respectively. After visible light irradiation for 220 min with ZnBiYO4 as catalyst, complete removal and mineralization of methyl orange were observed. The reduction of total organic carbon, formation of inorganic products, SO4(2-) and NO3-, and evolution of CO2 re...Continue Reading

References

Aug 15, 2006·Journal of Hazardous Materials·Lin-Rui HouYang Peng
Oct 12, 2012·Environmental Science and Pollution Research International·Minoo TasbihiUrška Lavrenčič Stangar
Mar 22, 2014·Journal of Environmental Sciences (China)·Zhiqiao HeJianmeng Chen
Aug 1, 2014·Journal of Environmental Sciences (China)·Hongmin WuHong He

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Citations

Oct 18, 2016·Journal of Environmental Sciences (China)·Qingcai FengX Chris Le
Dec 19, 2017·Photochemistry and Photobiology·Schindra Kumar RaySoo Wohn Lee

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