Simultaneous precipitation and discharge plasma processing for one-step synthesis of α-Fe2O3–Fe3O4/graphene visible light magnetically separable photocatalysts

Nguyen Long Tuyen; Tran Quoc Toan; Nguyen Ba Hung; Pham Quoc Trieu; Nguyen Ngoc Dinh; Danh Bich Do; Dang Van Thanh; Van-Truong Nguyen

doi:10.1039/D2RA06844C

Simultaneous precipitation and discharge plasma processing for one-step synthesis of α-Fe₂O₃–Fe₃O₄/graphene visible light magnetically separable photocatalysts†

Nguyen Long Tuyen,

^ab Tran Quoc Toan,*^c Nguyen Ba Hung,^d Pham Quoc Trieu,^a Nguyen Ngoc Dinh,^a Danh Bich Do,^e Dang Van Thanh

^fg and Van-Truong Nguyen

*^h

Author affiliations

* Corresponding authors

^a VNU University of Science, 334 Nguyen Trai Str., Thanh Xuan Dist., Hanoi, Vietnam

^b Hung Vuong University, Nong Trang, Viet Tri City, Phu Tho, Vietnam

^c Faculty of Chemistry, Thai Nguyen University of Education, 20 Luong Ngoc Quyen, Thai Nguyen, Vietnam

^d Vietnam Military Medical University, 160 Phung Hung, Ha Dong, Hanoi, Vietnam

^e Faculty of Physics, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi, Viet Nam

^f TNU-University of Medicine and Pharmacy, 284 Luong Ngoc Quyen, Thai Nguyen, Vietnam

^g Faculty of Environmental Sciences, University of Science, Vietnam National University, 334 Nguyen Trai Road, Ha Noi City 100000, Hanoi, Vietnam

^h Faculty of Fundamental and Applied Science, Thai Nguyen University of Technology, 666, 3/2 Street, Tich Luong Ward, Thai Nguyen, Vietnam
E-mail: vtnguyen@tnut.edu.vn

Abstract

A novel facile combination of precipitation and plasma discharge reaction is successfully employed for one-step synthesis of an α-Fe₂O₃–Fe₃O₄ graphene nanocomposite (GFs). The co-existence and anchoring of hematite (α-Fe₂O₃) and magnetite (Fe₃O₄) nanoparticles onto a graphene sheet in the as synthesized GFs were verified by results of XRD, Raman, SEM, TEM, and XPS. HRTEM characterization was used for confirming the bonding between α-Fe₂O₃/Fe₃O₄ nanoparticles and the graphene sheet. Consequently, GFs shows superior photodegrading performance towards methylene blue (MB), compared to individual α-Fe₂O₃/Fe₃O₄ nanoparticles, as a result of band gap narrowing and the electron–hole pair recombination rate reducing. Moreover, GFs allows a good possibility of separating and recycling under an external-magnetic field, suggesting potential in visible-light-promoted photocatalytic applications.

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Article information

DOI: https://doi.org/10.1039/D2RA06844C
Article type: Paper
Submitted: 29 Oct 2022
Accepted: 21 Feb 2023
First published: 07 Mar 2023
This article is Open Access

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RSC Adv., 2023,13, 7372-7379

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Simultaneous precipitation and discharge plasma processing for one-step synthesis of α-Fe₂O₃–Fe₃O₄/graphene visible light magnetically separable photocatalysts

N. L. Tuyen, T. Q. Toan, N. B. Hung, P. Q. Trieu, N. N. Dinh, D. B. Do, D. Van Thanh and V. Nguyen, RSC Adv., 2023, 13, 7372 DOI: 10.1039/D2RA06844C

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