期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 900, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.163410
关键词
Photo-Fenton; Fe-N bonds; Biowaste material; Broad pH; Fe-doped g-C3N4
资金
- National Natural Science Foundation of China [21906072, 22006057]
- Natural Science Foundation of Jiangsu Province [BK20190982]
- Henan Postdoctoral Foundation [202003013]
- Doctor of Mass entrepreneurship and innovation Project in Jiangsu Province, Doctoral Scientific Research Foundation of Jiangsu University of Science and Technology (China) [1062931806, 1142931803]
- Open Fund for Hebei Province Key Laboratory of Sustained Utilization & Development of Water Recourse [HSZYL2021003]
- Science and Technology Research Project of Henan Province [202102210055]
- General project of Chinese postdoctoral program [2020M672263]
- Natural Science Youth Fund of Henan Province [202300410033]
- Henan Key Scientific Research Projects [20A150009]
Inspired by animal blood, a Fe doped gC3N4 photocatalyst was prepared and applied for the photo-Fenton degradation of tetracycline under visible light. The photocatalyst exhibited high activity under different pH conditions.
Inspired by animal blood as a biowaste rich in biological enzymes with molecular Fe-N centers, Fe doped gC3N4 (FCN) photocatalyst was successfully prepared by one-step thermal polymerization with pig blood and melamine to produce an efficient photocatalyst with Fe-N active sites for photo-Fenton degradation of tetracycline (TC) under visible light irradiation. The photocatalytic TC degradation results exhibited that FCN-1 sample possesses optimal photocatalytic degradation activity for TC (50 mg/L) in the presence of H2O2 system and a broad range over pH adaptation. The optimum photo-Fenton degradation activities of TC (50 mg/L) under visible-light irradiation for FCN-1/H2O2 system reach to 84.9% and 0.034 min-1 within 120 min under acidic conditions (pH = 3.1) and to 85% and 0.093 min-1 (first 20 min) in alkaline environment. Enhanced photocatalytic activity is mainly attributed to the positive roles of Fe-N bonds in FCN during the photo-Fenton process as follows: (i) improving the absorbance and separation efficiency in electron-hole pairs; (ii) accelerating the catalytic cycles between Fe2+/Fe3+ to produce more center dot OH in acidic condition; (iii) serving as active sites to boost the production of more photon-generated carriers in alkaline environment. Our work overcame the defect of low photocatalytic activity in photo-Fenton process under alkaline conditions, and provided a simple design idea for the low-cost synthesis of visible-light-driven photocatalyst with high efficiency applied to photo-Fenton reaction. (c) 2021 Elsevier B.V. All rights reserved.
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