Synthesis and properties of the BiVO<sub>4</sub> based composite photocatalysts

Liu Jingjing

doi:10.7513/j.issn.1004-7638.2024.02.011

Volume 45 Issue 2

Feb. 2024

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Liu Jingjing. Synthesis and properties of the BiVO4 based composite photocatalysts[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(2): 72-78, 124. doi: 10.7513/j.issn.1004-7638.2024.02.011

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Liu Jingjing. Synthesis and properties of the BiVO₄ based composite photocatalysts[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(2): 72-78, 124. doi: 10.7513/j.issn.1004-7638.2024.02.011

Liu Jingjing. Synthesis and properties of the BiVO4 based composite photocatalysts[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(2): 72-78, 124. doi: 10.7513/j.issn.1004-7638.2024.02.011

Citation:

Liu Jingjing. Synthesis and properties of the BiVO₄ based composite photocatalysts[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(2): 72-78, 124. doi: 10.7513/j.issn.1004-7638.2024.02.011

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Synthesis and properties of the BiVO₄ based composite photocatalysts

doi: 10.7513/j.issn.1004-7638.2024.02.011

Liu Jingjing^{1, 2
,}

1.
College of Vanadium and Titanium, Panzhihua University, Panzhihua 617000, Sichuan, China
2.
Sichuan Province Engineering Technology Research Center of Vanadium and Titanium Materials, Panzhihua 617000, Sichuan, China

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Received Date: 2023-11-05
Available Online: 2024-04-30
Publish Date: 2024-04-30

Abstract

Abstract

Binary BiOCl/BiVO₄ and ternary BiOCl/BiVO₄/diatomite photocatalysts were in situ prepared by liquid phase precipitation using bismuth nitrate, ammonium metadadate, potassium chloride and diatomite as raw materials, and the phase structure and photocatalytic properties of the composites were characterized. The results show that BiOCl/BiVO₄ consists of monoclinic BiVO₄ and BiOCl, and BiOCl/BiVO₄/diatomite consists of monoclinic BiVO₄, BiOCl and SiO₂. The increase of the calcination temperature can promote the conversion of BiVO₄ into BiOCl. Compared with BiVO₄, the photodegradation efficiencies of the composites are enhanced significantly, and the optimum calcination temperature is 450 ℃. The photodegradation efficiencies of BiOCl/BiVO₄ at 1.5 h and BiOCl/BiVO₄/diatomite at 2.5 h are 99.05% and 100%, which is 3.05 and 2.68 times that of the BiVO₄ under the same conditions, respectively, indicating that the introduction of BiOCl or BiOCl/diatomite into BiVO₄ can effectively improve the photocatalytic activity. The enhanced photocatalytic activity of the composites can be ascribed to the p-n heterojunction formed between BiOCl and BiVO₄ and the special layered structure of BiOCl, which improve the adsorption performance for rhodamine B, effectively inhibit the electron-hole pairs recombination, and accelerate the separation and transfer of charge carriers, leading to potential application prospects in the environmental purification.
- BiVO₄,
- BiOCl,
- diatomite,
- composite photocatalytic,
- liquid phase precipitation,
- degradation rate

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References(21)

References

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