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- Title
Photoelectrochemical and photo-Fenton properties of ZnFe<sub>2</sub>O<sub>4</sub>@g-C<sub>3</sub>N<sub>4</sub> nanocomposites.
- Authors
Li, Zhiming; Wei, Zhiqiang; Ding, Meijie; Zhao, Jiwei; Yu, Qingsong; Zhou, Meipan
- Abstract
In the social context of increasing water pollution, we conducted an in-depth study to prepare ZnFe2O4@g-C3N4 heterojunction nanocomposites by hydrothermal method. The microscopic morphology and structure were analyzed using XRD, SEM, TEM, UV–Vis, and other characterization methods. The photo-Fenton activity of the highly concentrated antibiotic tetracycline was tested under visible light irradiation in combination with the presence of H2O2, and the catalytic mechanism was investigated. The results showed that the construction of heterojunction significantly improved the catalytic activity of ZnFe2O4@g-C3N4 catalyst prepared by hydrothermal method. The degradation rate of tetracycline at 40 mg L−1 was 92.6% within 60 min, and the degradation rate was 0.06 min−1, which was nearly six times higher than that of pure ZnFe2O4. The results of free radical trapping experiments and electron spin resonance technique indicated that hydroxyl radicals (·OH) and superoxide radicals (·O2−) played important roles in the photo-Fenton degradation of tetracycline. Notably, the catalyst maintained a high degradation rate (87.2%) after five cycles. The heterojunction designed in this thesis may provide a promising strategy for achieving maximum light absorption and is authoritative in meeting environmental requirements in the future.
- Subjects
ELECTRON paramagnetic resonance; SILVER; NANOCOMPOSITE materials; HYDROXYL group; VISIBLE spectra; CATALYTIC activity; PHOTOELECTROCHEMICAL cells; HETEROJUNCTIONS
- Publication
Journal of Materials Science: Materials in Electronics, 2024, Vol 35, Issue 18, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-024-12905-w