蜂巢状LaVO4/Bi2O3异质结光催化降解盐酸四环素的研究

doi:10.19964/j.issn.1006-4990.2024-0149

Abstract

Abstract:

To enhance the photocatalytic activity of Bi₂O₃，LaVO₄/Bi₂O₃ composite was synthesized by solvothermal and hydrothermal methods.The structure，morphology and properties of the composite were analyzed and characterized using various methods.Using tetracycline hydrochloride（TCH） as the degradation object，the photocatalytic activity of the composite was investigated.The findings revealed that LaVO₄ was in close contact with the Bi₂O₃ surface，creating a Z-type heterojunction.This unique architecture effectively enhanced the photogenerated carrier separation and thus significantly amplified the visible light catalytic efficiency of LaVO₄/Bi₂O₃.The LaVO₄/Bi₂O₃ composite catalyst exhibited a honeycomb morphology，which significantly increased the specific surface area of the catalyst and facilitated adsorption，diffusion and transport of reactant molecules.LaVO₄/Bi₂O₃ exhibited the highest photocatalytic activity for TCH compared to Bi₂O₃ and LaVO₄.The optimal photocatalytic activity and stability of the composite catalyst was observed at 5% for LaVO₄.The degradation rate of LaVO₄/Bi₂O₃ on TCH was found to be 86.32% after 3 h of visible light and 76.58% after 4 cycles，indicating that its physical and chemical properties were stable and could be used for a long time.The quenching experiments revealed that the main active species in the degradation of TCH by LaVO₄/Bi₂O₃ were ·OH and ·O₂^-.This study provided a new way to enhance the photocatalytic activity of Bi₂O₃ and effectively remove TCH in water.

Key words: Bi₂O₃, LaVO₄, honeycomb, photocatalysis, tetracycline hydrochloride

CLC Number:

TQ426.6

ZUO Guangling, WANG Minghui, PENG Yunying, DU Jia, YE Hongyong. Study on hnoneycomb-like LaVO₄/Bi₂O₃ heterojunction for photocatalytic degradation of tetracycline hydrochloride[J]. Inorganic Chemicals Industry, 2024, 56(11): 158-164.

Figures/Tables 10

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Study on hnoneycomb-like LaVO₄/Bi₂O₃ heterojunction for photocatalytic degradation of tetracycline hydrochloride

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Study on hnoneycomb-like LaVO4/Bi2O3 heterojunction for photocatalytic degradation of tetracycline hydrochloride