Zobraziť v EDS

FeCN/MXene as novel heterogeneous electro-Fenton catalysts for the degradation of sulfathiazole: Performance and mechanism investigation.

Uložené v:
Podrobná bibliografia
Názov: FeCN/MXene as novel heterogeneous electro-Fenton catalysts for the degradation of sulfathiazole: Performance and mechanism investigation.
Autori: Liu, Huilai1 (AUTHOR), Li, Zhihao1 (AUTHOR), Kong, Defeng1 (AUTHOR), Chen, Xing1 (AUTHOR) xingchen@hfut.edu.cn
Zdroj: Journal of Environmental Sciences (Elsevier). Aug2025, Vol. 154, p300-313. 14p.
Predmety: ORGANIC water pollutants, ELECTRON paramagnetic resonance, HETEROGENEOUS catalysts, FRONTIER orbitals, CATALYTIC oxidation
Abstrakt: The present study aims to fabricate heterogeneous electro-Fenton (HEF) cathode catalysts for the in-situ generation of H 2 O 2 and the degradation of organic pollutants in water. To achieve this, preparation of Fe and N co-doped MXene composites (FeCN/MXene- x , where x represents the loading content of FeCN) and construction of the HEF system for the degradation of sulfathiazole (STZ) were carried out. The characterization results showed that Fe, C and N mainly existed in the form of Fe 3 C and Fe 3 N in the FeCN/MXene catalysts, which were favorable for promoting the ORR reaction in the HEF system. Among them, FeCN/MXene-2 exhibited the highest redox electron transfer rate and H 2 O 2 selectivity (86%). The catalytic oxidation mechanism of the FeCN/MXene-2/HEF system was investigated by free radical quenching, electron paramagnetic resonance and frontier orbital theory studies. These studies demonstrated that the main active substances for the degradation of STZ were ·OH and 1O 2. In addition, the excellent stability and practical performance of the prepared cathodic catalysts were demonstrated by cycling experiments and real water sample tests. Schematic diagram of degradation mechanism. [Display omitted] [ABSTRACT FROM AUTHOR]
Copyright of Journal of Environmental Sciences (Elsevier) is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Databáza: Business Source Index
Popis
Abstrakt:The present study aims to fabricate heterogeneous electro-Fenton (HEF) cathode catalysts for the in-situ generation of H 2 O 2 and the degradation of organic pollutants in water. To achieve this, preparation of Fe and N co-doped MXene composites (FeCN/MXene- x , where x represents the loading content of FeCN) and construction of the HEF system for the degradation of sulfathiazole (STZ) were carried out. The characterization results showed that Fe, C and N mainly existed in the form of Fe 3 C and Fe 3 N in the FeCN/MXene catalysts, which were favorable for promoting the ORR reaction in the HEF system. Among them, FeCN/MXene-2 exhibited the highest redox electron transfer rate and H 2 O 2 selectivity (86%). The catalytic oxidation mechanism of the FeCN/MXene-2/HEF system was investigated by free radical quenching, electron paramagnetic resonance and frontier orbital theory studies. These studies demonstrated that the main active substances for the degradation of STZ were ·OH and 1O 2. In addition, the excellent stability and practical performance of the prepared cathodic catalysts were demonstrated by cycling experiments and real water sample tests. Schematic diagram of degradation mechanism. [Display omitted] [ABSTRACT FROM AUTHOR]
ISSN:10010742
DOI:10.1016/j.jes.2024.07.024