Academic Journal
Synergistically S/N self-doped biochar as a green bifunctional cathode catalyst in electrochemical degradation of organic pollutant
| Title: | Synergistically S/N self-doped biochar as a green bifunctional cathode catalyst in electrochemical degradation of organic pollutant |
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| Authors: | Xuechun Wang, Huizhong Wu, Jiana Jing, Ge Song, Xuyang Zhang, Minghua Zhou, Raf Dewil |
| Source: | Green Energy & Environment, Vol 10, Iss 1, Pp 214-230 (2025) |
| Publisher Information: | KeAi Communications Co., Ltd., 2025. |
| Publication Year: | 2025 |
| Collection: | LCC:Renewable energy sources LCC:Ecology |
| Subject Terms: | Biochar, S and N self-doping, H2O2 production, In-situ FTIR, Metal-free electrochemical advanced oxidation processes, Renewable energy sources, TJ807-830, Ecology, QH540-549.5 |
| More Details: | Biomass-derived heteroatom self-doped cathode catalysts has attracted considerable interest for electrochemical advanced oxidation processes (EAOPs) due to its high performance and sustainable synthesis. Herein, we illustrated the morphological fates of waste leaf-derived graphitic carbon (WLGC) produced from waste ginkgo leaves via pyrolysis temperature regulation and used as bifunctional cathode catalyst for simultaneous H2O2 electrochemical generation and organic pollutant degradation, discovering S/N-self-doping shown to facilitate a synergistic effect on reactive oxygen species (ROS) generation. Under the optimum temperature of 800 °C, the WLGC exhibited a H2O2 selectivity of 94.2% and tetracycline removal of 99.3% within 60 min. Density functional theory calculations and in-situ Fourier transformed infrared spectroscopy verified that graphitic N was the critical site for H2O2 generation. While pyridinic N and thiophene S were the main active sites responsible for ˙OH generation, N vacancies were the active sites to produce 1O2 from O2. The performance of the novel cathode for tetracycline degradation remains well under a wide pH range (3–11), maintaining excellent stability in 10 cycles. It is also industrially applicable, achieving satisfactory performance treating in real water matrices. This system facilitates both radical and non-radical degradation, offering valuable advances in the preparation of cost-effective and sustainable electrocatalysts and hold strong potentials in metal-free EAOPs for organic pollutant degradation. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 2468-0257 |
| Relation: | http://www.sciencedirect.com/science/article/pii/S246802572400061X; https://doaj.org/toc/2468-0257 |
| DOI: | 10.1016/j.gee.2024.03.001 |
| Access URL: | https://doaj.org/article/af10330c958348118ddb92b304d8b759 |
| Accession Number: | edsdoj.f10330c958348118ddb92b304d8b759 |
| Database: | Directory of Open Access Journals |
| ISSN: | 24680257 |
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| DOI: | 10.1016/j.gee.2024.03.001 |
| Published in: | Green Energy & Environment |
| Language: | English |