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

被引：14
作者：
Frindy, Sana [1 ]
Li, Yongdan [1 ,2 ]
Mika Sillanpaa [3 ,4 ,5 ]
机构：
[1] Aalto Univ, Sch Chem Engn, Dept Chem & Met Engn, Kemistintie 1,POB 16100, FI-00076 Espoo, Aalto, Finland
[2] Tianjin Univ, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin Key Lab Appl Catalysis Sci & Technol, State Key Lab Chem Engn, Tianjin 300072, Peoples R China
[3] Duy Tan Univ, Inst Res & Dev, Da Nang 550000, Vietnam
[4] Duy Tan Univ, Fac Environm & Chem Engn, Da Nang 550000, Vietnam
[5] Univ Johannesburg, Sch Min Met & Chem Engn, Dept Chem Engn, POB 17011, ZA-2028 Doornfontein, South Africa
来源：
SEPARATION AND PURIFICATION TECHNOLOGY | 2022年 / 284卷
关键词：
-Fe2O3-Bi2S3; heterojunction; Graphene co-catalyst; Hydrothermal; Photo-Fenton reaction; Benzotriazole; Photocatalysis; HYDROTHERMAL SYNTHESIS; OXIDATIVE-DEGRADATION; FACILE SYNTHESIS; WASTE-WATER; GRAPHENE; BENZOTRIAZOLE; REMOVAL; NANOPARTICLES; HETEROJUNCTION; PERFORMANCE;
D O I：
10.1016/j.seppur.2021.120241
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
alpha-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 alpha-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 center dot & nbsp;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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页数：11
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