自旋极化增强ZnFe1.2Co0.8O4/BiVO4 S型异质结光催化性能降解四环素

doi:10.1016/j.actphy.2025.100050

Abstract

Abstract:

Recently, the regulation of electronic spin polarization has attracted considerable interest as an effective strategy to mitigate the rapid recombination of photo-generated charges. However, current research predominantly targets individual photocatalysts, where the efficiency of charge separation still has significant room for improvement. Herein, a ZnFe_1.2Co_0.8O₄ (ZFCO) and BiVO₄ (BVO) S-scheme heterojunction was developed, which synergistically promoted charge separation through the S-scheme heterojunction and spin polarization, and further enhanced the photocatalytic performance in removing organic pollutants under an external magnetic field. Experimental results revealed that under sole light irradiation, ZB-1.5 (ZFCO : BVO = 3 : 2) demonstrated optimal performance, with a reaction rate constant (k) for tetracycline (TC) degradation of 0.0146 min⁻¹. Under light irradiation and magnetic field conditions, the reaction rate constant (k) of ZB-1.5 for TC degradation increased to 0.0175 min⁻¹, indicating enhanced photocatalytic performance. DFT calculations indicated that ZFCO exhibited the spin polarization. Photoluminescence measurements demonstrated that the S-scheme heterojunction structure improved the charge separation efficiency. In addition, possible degradation pathways and toxicity were assessed, indicating successful detoxification. This work provides some useful insights into utilizing S-scheme heterojunctions to develop photocatalysts with efficient separation of photo-generated charges.

Key words: Electron spin-polarization, Ferromagnetic photocatalyst, S-scheme heterojunction, Magnetic field

Jinwang Wu, Qijing Xie, Chengliang Zhang, Haifeng Shi. Rationally Designed ZnFe_1.2Co_0.8O₄/BiVO₄ S-Scheme Heterojunction with Spin-Polarization for the Elimination of Antibiotic[J]. Acta Phys. -Chim. Sin. 2025, 41(5), 100050. doi: 10.1016/j.actphy.2025.100050

Figures/Tables 10

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Materials	Total carbon (mg∙L⁻¹)	Inorganic carbon (mg∙L⁻¹)	TOC removal rates (%)
ZB-1.5	13.011	5.173	39.757
ZB-1.5 (1st cycle)	12.935	5.141	39.748
ZB-1.5 (2nd cycle)	12.860	5.111	39.746

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Rationally Designed ZnFe_1.2Co_0.8O₄/BiVO₄ S-Scheme Heterojunction with Spin-Polarization for the Elimination of Antibiotic

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