The inefficiency of conventional water treatment technologies in dealing with antibiotic contamination has raised global concerns. Herein, a promising photoelectrocatalytic (PEC) system enhanced by peroxymonosulfate (PMS) is developed to treat antibiotics in drinking water in which Ag₃PO₄/n-Si micropyramids (n-SiMPs) serves as a photoanode. The Ag₃PO₄/n-SiMPs photoanode exhibits enhanced PEC performance due to the construction of the S-scheme heterojunction, which could effectively activate the PMS to degrade tetracycline (96.25 %) at a potential of 0.8 V with addition of 0.8 mM PMS in the PEC/PMS system after 2 h. Besides, the degradation rate of TC under this system still maintains about 80 % after 20 cycles, which shows an excellent stability of degradation. Mechanistic investigations demonstrate that ¹O₂, ·OH, SO₄·⁻ and ·O₂⁻ co-contribute to the degradation of tetracycline. The study provides key insights to construct PEC/PMS system with efficient photoanode for practical antibiotics removal from water.

中文翻译：

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Ag3PO4/n-SiMPs 光阳极-过氧一硫酸盐偶联系统，实现高效的四环素降解性能


传统水处理技术在处理抗生素污染方面的效率低下引起了全球的关注。在此，开发了一种由过氧一硫酸盐 （PMS） 增强的有前途的光电催化 （PEC） 系统来处理饮用水中的抗生素，其中 Ag₃PO₄/n-Si 微金字塔 （n-SiMPs） 用作光阳极。Ag₃PO₄/n-SiMPs 光阳极由于构建了 S 型异质结而表现出增强的 PEC 性能，它可以有效地激活 PMS 在 0.8 V 的电位下降解四环素 （96.25 %）2 小时后在 PEC/PMS 系统中添加 0.8 mM PMS。此外，该系统下 TC 的降解率在 20 次循环后仍保持 80% 左右，表现出优异的降解稳定性。机理研究表明，¹O₂， ·哦，所以₄·⁻ 和 ·O₂⁻ 共同促进四环素的降解。该研究为构建具有高效光阳极的 PEC/PMS 系统以实际去除水中抗生素提供了关键见解。