Synthesis of novel α-Fe2O3-Bi2S3-Gr for efficient photocatalytic degradation of environmental pollutants under visible-LED light irradiation
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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2022-02-01
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en
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11
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Separation and Purification Technology, Volume 284
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.Description
Funding Information: Dr. Sana Frindy is very thankful to MAA- JA VESITEKNIIKAN TUKI (No.38881) which funded her research project entitled “Environmental purification by photo-catalysis using graphene-based materials from biomass waste”. Prof. Yuri Park is gratefully acknowledged for her valuable discussions. Publisher Copyright: © 2021
Keywords
Benzotriazole, Graphene co-catalyst, Hydrothermal, Photo-Fenton reaction, Photocatalysis, α-FeO-BiS heterojunction
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Citation
Frindy, S, Li, Y & Sillanpää, M 2022, ' Synthesis of novel α-Fe 2 O 3 -Bi 2 S 3 -Gr for efficient photocatalytic degradation of environmental pollutants under visible-LED light irradiation ', Separation and Purification Technology, vol. 284, 120241 . https://doi.org/10.1016/j.seppur.2021.120241