Construction of magnetic Fe<sub>3</sub>O<sub>4</sub>-BiOBr/Graphene aerogel and Cr(VI) wastewater purification

TIE Weiwei; QIU Shuaibiao; WANG Hongxia; YUAN Shuangyi; DONG Xu; HE Weiwei

doi:10.13801/j.cnki.fhclxb.20230911.001

Volume 41 Issue 4

Apr. 2024

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Article Navigation > Acta Materiae Compositae Sinica > 2024 > 41(4): 1987-1996

TIE Weiwei, QIU Shuaibiao, WANG Hongxia, et al. Construction of magnetic Fe3O4-BiOBr/Graphene aerogel and Cr(VI) wastewater purification[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 1987-1996. doi: 10.13801/j.cnki.fhclxb.20230911.001

Citation:

TIE Weiwei, QIU Shuaibiao, WANG Hongxia, et al. Construction of magnetic Fe₃O₄-BiOBr/Graphene aerogel and Cr(VI) wastewater purification[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 1987-1996. doi: 10.13801/j.cnki.fhclxb.20230911.001

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Construction of magnetic Fe₃O₄-BiOBr/Graphene aerogel and Cr(VI) wastewater purification

doi: 10.13801/j.cnki.fhclxb.20230911.001

Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Institute of Surface Micro and Nano Materials, College of Chemical and Materials Engineering, Xuchang University,Xuchang 461000, China

Funds: National Innovation and Entrepreneurship Training Program for College Students of Henan Province (202110480014); Youth Backbone Teacher Funding Project in Universities of Henan Province (2021GGJS145); Key Scientific Research Project in Universities of Henan Province (22A430036)

Received Date: 2023-06-13
Accepted Date: 2023-08-29
Rev Recd Date: 2023-08-18

Available Online: 2023-09-12

Publish Date: 2024-04-15

Abstract

Abstract

In order to improve the photogenerated electron-hole separation and recycling ability of single semiconductor powder material, based on the functionally synergistic effect, magnetic graphene aerogel (Fe₃O₄-BiOBr/graphene) modified by Fe₃O₄-BiOBr had been facilely prepared by one-step hydrothermal process by dispersing Fe₃O₄-BiOBr composite in aqueous solution of graphene oxide containing lysine. The Fe₃O₄-BiOBr composite was synthesized in non-miscible solvent system under room-temperature, in which nano Fe₃O₄, firstly prepared by co-precipitation method using Fe³⁺/Fe²⁺ salt under the action of ammonia water with a certain concentration, was dispersed in n-octane containing hexadecyl trimethyl ammonium bromide (CTAB) for providing Br^–, interacting with an aqueous solution containing bismuth nitrate and citric acid adding drop by drop. The crystal structure, morphology and catalytic activity of the samples were characterized by XRD, Raman, XPS, SEM, TEM, and UV-Vis spectra. Fe₃O₄-BiOBr/graphene composites, in which spherical Fe₃O₄ with a size of 10-25 nm are evenly embedded in layered BiOBr flakes, and they interact with graphene, overall, have showed a sphere-sheet-cavity structure. Fe₃O₄-BiOBr/graphene composites have favorable visible light absorption efficiency and Cr(VI) photocatalytic activity. The photocatalytic activity of Cr(VI) could achieve about 100% within 30 min, which is higher than that of single magnetic Fe₃O₄. This phenomenon maybe origin from the introduction of Fe₃O₄-BiOBr heterostructure and conductive graphene as well as their good interfacial interaction within them, effectively promoting the separation efficiency of photogenerated electrons and holes between Fe₃O₄-BiOBr/graphene composite.
- BiOBr,
- Fe₃O₄,
- graphene aerogel,
- Cr(VI),
- magnetic recovery,
- photocatalytic reduction
Long Abstrsct
Innovation Points

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References(34)

References

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