Preparation and Visible Light Catalytic Performance of Fe3O4/Ag/BiVO4/Sepiolite Composites

To increase specific surface area and light utilization of photo‐catalysts, a series of Fe3O4/Ag/BiVO4/sepiolite composites with different Fe3O4 contents were synthesized via co‐precipitation. The structure, composition, and optical properties of these composites were characterized using X‐ray diffr...

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Bibliographic Details
Published in:ChemistrySelect (Weinheim) 2024-07, Vol.9 (27), p.n/a
Main Authors: Gu, Yao, Shi, Dongjian, Wang, Liang, Chen, Mingqing
Format: Article
Language:English
Subjects:
degradation
Fe3O4/Ag/BiVO4/sepiolite
photo-catalysis
visible light
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Summary:To increase specific surface area and light utilization of photo‐catalysts, a series of Fe3O4/Ag/BiVO4/sepiolite composites with different Fe3O4 contents were synthesized via co‐precipitation. The structure, composition, and optical properties of these composites were characterized using X‐ray diffraction (XRD), nitrogen adsorption and desorption (BET), UV‐Vis diffuse reflectance spectroscopy (UV‐Vis DRS), and fluorescence spectroscopy (PL). The photo‐catalytic activity of the composites was further evaluated using rhodamine B as a model for photo‐catalytic degradation. The results revealed that the composites with optimal Fe3O4 loading exhibited the narrowest bandgap width, approximately 2.13 eV, and the highest electron‐hole pair separation efficiency. Rhodamine B could be almost completely degraded within a short illumination time in the presence of the Fe3O4/Ag/BiVO4/sepiolite composites. The degradation mechanism of rhodamine B was proposed to involve the improvement of the photo‐catalytic activity of the resulting composites by the Fe3O4 and the Z‐type heterojunction structure. Additionally, the composites could be recycled and reused multiple times, making them an environmentally friendly and sustainable option. A range of Fe3O4/Ag/BiVO4/sepiolite composite materials, featuring varying Fe3O4 concentrations, were synthesized utilizing the co‐precipitation method. The inherent magnetic characteristics of Fe3O4, combined with the resultant Z‐type heterojunction structure, confer exceptional photo‐catalytic prowess upon the material. This enables swift degradation of rhodamine B, and furthermore, facilitates its retrieval for subsequent reuse.
ISSN:2365-6549
2365-6549
DOI:10.1002/slct.202303733