Synthesis of novel α-Fe2O3-Bi2S3-Gr for efficient photocatalytic degradation of environmental pollutants under visible-LED light irradiation

Sana Frindy; Yongdan Li; Mika Sillanpää

doi:10.1016/j.seppur.2021.120241

Synthesis of novel α-Fe₂O₃-Bi₂S₃-Gr for efficient photocatalytic degradation of environmental pollutants under visible-LED light irradiation

Sana Frindy, Yongdan Li, Mika Sillanpää

Chemical Engineering Technology

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

α-Fe₂O₃-Bi₂S₃ nanorods was successfully synthesized via a hydrothermal route with incorporation of graphene obtained from the pyrolysis of alginate, and was employed as a catalyst of the degradation of benzotriazole (BTA) in a photo-Fenton process. Due to the unique combination of graphene and the binary α-Fe₂O₃-Bi₂S₃ nanorod, the sample with 3 wt% graphene loading shows a high catalytic activity of 98% of BTA conversion under LED-visible light. The quenched free radicals are detected with an Electron Spin Resonance (ESR) technique, and the results indicate that hydroxyl radical ^•OH contributed to the BTA degradation reaction. A mechanism is proposed. Furthermore, the reusability of the catalyst was examined and the catalyst showed high activity over four cyclic runs.

Original language	English
Article number	120241
Journal	Separation and Purification Technology
Volume	284
DOIs	https://doi.org/10.1016/j.seppur.2021.120241
Publication status	Published - 1 Feb 2022

Keywords

Benzotriazole
Graphene co-catalyst
Hydrothermal
Photo-Fenton reaction
Photocatalysis
α-FeO-BiS heterojunction

ASJC Scopus subject areas

Analytical Chemistry
Filtration and Separation

Access to Document

10.1016/j.seppur.2021.120241

Cite this

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title = "Synthesis of novel α-Fe2O3-Bi2S3-Gr for efficient photocatalytic degradation of environmental pollutants under visible-LED light irradiation",

abstract = "α-Fe2O3-Bi2S3 nanorods was successfully synthesized via a hydrothermal route with incorporation of graphene obtained from the pyrolysis of alginate, and was employed as a catalyst of the degradation of benzotriazole (BTA) in a photo-Fenton process. Due to the unique combination of graphene and the binary α-Fe2O3-Bi2S3 nanorod, the sample with 3 wt% graphene loading shows a high catalytic activity of 98% of BTA conversion under LED-visible light. The quenched free radicals are detected with an Electron Spin Resonance (ESR) technique, and the results indicate that hydroxyl radical •OH contributed to the BTA degradation reaction. A mechanism is proposed. Furthermore, the reusability of the catalyst was examined and the catalyst showed high activity over four cyclic runs.",

keywords = "Benzotriazole, Graphene co-catalyst, Hydrothermal, Photo-Fenton reaction, Photocatalysis, α-FeO-BiS heterojunction",

author = "Sana Frindy and Yongdan Li and Mika Sillanp{\"a}{\"a}",

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doi = "10.1016/j.seppur.2021.120241",

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T1 - Synthesis of novel α-Fe2O3-Bi2S3-Gr for efficient photocatalytic degradation of environmental pollutants under visible-LED light irradiation

AU - Frindy, Sana

AU - Li, Yongdan

AU - Sillanpää, Mika

PY - 2022/2/1

Y1 - 2022/2/1

N2 - α-Fe2O3-Bi2S3 nanorods was successfully synthesized via a hydrothermal route with incorporation of graphene obtained from the pyrolysis of alginate, and was employed as a catalyst of the degradation of benzotriazole (BTA) in a photo-Fenton process. Due to the unique combination of graphene and the binary α-Fe2O3-Bi2S3 nanorod, the sample with 3 wt% graphene loading shows a high catalytic activity of 98% of BTA conversion under LED-visible light. The quenched free radicals are detected with an Electron Spin Resonance (ESR) technique, and the results indicate that hydroxyl radical •OH contributed to the BTA degradation reaction. A mechanism is proposed. Furthermore, the reusability of the catalyst was examined and the catalyst showed high activity over four cyclic runs.

AB - α-Fe2O3-Bi2S3 nanorods was successfully synthesized via a hydrothermal route with incorporation of graphene obtained from the pyrolysis of alginate, and was employed as a catalyst of the degradation of benzotriazole (BTA) in a photo-Fenton process. Due to the unique combination of graphene and the binary α-Fe2O3-Bi2S3 nanorod, the sample with 3 wt% graphene loading shows a high catalytic activity of 98% of BTA conversion under LED-visible light. The quenched free radicals are detected with an Electron Spin Resonance (ESR) technique, and the results indicate that hydroxyl radical •OH contributed to the BTA degradation reaction. A mechanism is proposed. Furthermore, the reusability of the catalyst was examined and the catalyst showed high activity over four cyclic runs.

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KW - Hydrothermal

KW - Photo-Fenton reaction

KW - Photocatalysis

KW - α-FeO-BiS heterojunction

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