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

Liu Jingjing; Yan Yue’e

doi:10.7513/j.issn.1004-7638.2023.01.010

Volume 44 Issue 1

Feb. 2023

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Liu Jingjing, Yan Yue’e. Synthesis and properties of the diatomite/BiVO4 composite photocatalysts[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(1): 49-55. doi: 10.7513/j.issn.1004-7638.2023.01.010

Citation:

Liu Jingjing, Yan Yue’e. Synthesis and properties of the diatomite/BiVO₄ composite photocatalysts[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(1): 49-55. doi: 10.7513/j.issn.1004-7638.2023.01.010

Liu Jingjing, Yan Yue’e. Synthesis and properties of the diatomite/BiVO4 composite photocatalysts[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(1): 49-55. doi: 10.7513/j.issn.1004-7638.2023.01.010

Citation:

Liu Jingjing, Yan Yue’e. Synthesis and properties of the diatomite/BiVO₄ composite photocatalysts[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(1): 49-55. doi: 10.7513/j.issn.1004-7638.2023.01.010

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Synthesis and properties of the diatomite/BiVO₄ composite photocatalysts

doi: 10.7513/j.issn.1004-7638.2023.01.010

Liu Jingjing^{1, 2
,},
Yan Yue’e¹

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

Received Date: 2021-07-20
Publish Date: 2023-02-28

Abstract

Abstract

The diatomite/BiVO₄ composite materials with different diatomite content (5%～80%) were prepared by liquid precipitation method. The samples were characterized by XRD and UV-Vis. The results show that the composite consists of monoclinic BiVO₄, tetragonal BiVO₄ and SiO₂. BiVO₄ can be transformed into monoclinic phase by increasing the calcination temperature, and at a higher calcination temperature, the increase of diatomite content is conducive to the further transformation of BiVO₄ into monoclinic phase. Compared with BiVO₄, the photodegradation efficiencies of the composites with the diatomite contents of 5%～30% are improved in different degrees, and the optimum content of the diatomite is 10%. Under the conditions of calcination temperature of 450 ℃, photocatalytic time of 2 h, rhodamine B concentration of 10 mg/L, the removal and photodegradation efficiencies of the sample for rhodamine B can reach 100% and 60.41%, respectively. Holes are the main active species for the photodegradation of rhodamine B. The enhanced photocatalytic performance of the composite materials can be attributed to the good adsorption of the diatomite, the good dispersion of BiVO₄ and the formation of monoclinic BiVO₄/tetragonal BiVO₄/SiO₂ miscible p-n heterojunctions, which improve the adsorption for rhodamine B, increase the surface active site and specific surface area, and accelerate the separation and transmission of photoinduced carriers, with promising application for the treatment of organic pollutant wastewater.
- BiVO₄,
- photocatalytic,
- diatomite,
- liquid phase precipitation,
- degradation rate

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References(19)

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