In this study, to improve peroxymonosulfate (PMS)-mediated visible-light photocatalytic performance of g-C₃N₄ in antibiotics degradation and elucidate its mechanism, an ultrathin Co₃O₄ nanomeshes/g-C₃N₄ nanosheets 2D Z-scheme heterojunction composite (x% Co₃O₄/g-C₃N₄) was successfully prepared calcining the mixtures of MOF-Co ultrathin nanosheets and g-C₃N₄. This unique nanomeshes/nanosheets structure with large SSA (153.92 m²/g) possessed an abundance of accessible active sites and large area intimate interfaces between Co₃O₄ and g-C₃N₄, thus remarkably promoting the separation and transport of charge carriers. The as-prepared optimal 10% Co₃O₄/g-C₃N₄ composites exhibited excellent degradation efficiency toward tetracycline (TC) under visible light irradiation and were further enhanced with the addition of PMS. The mechanism of the enhanced TC degradation in Co₃O₄/g-C₃N₄/Vis/PMS system was investigated in detail based on the characterization of the catalysts, TC degradation efficiency assessment, electron paramagnetic resonance (EPR) measurements, and reactive oxygen species (ROSs) quenching results. The TC degradation pathway was proposed based on the intermediates identified by the gas chromatography-mass spectrometer (GC–MS) measurements. This study provides a facile and promising path for the remediation of contaminated water via PMS mediated photocatalysis over highly active g-C₃N₄-based catalysts.

在这项研究中，为改善过氧单硫酸盐（PMS）介导的gC ₃ N ₄可见光在抗生素降解中的光催化性能，并阐明其机理，采用超薄Co ₃ O ₄纳米网/ gC ₃ N ₄纳米片2D Z方案异质结复合材料（成功地制备了x％Co ₃ O ₄ / gC ₃ N ₄），以煅烧MOF-Co超薄纳米片和gC ₃ N ₄的混合物。这种独特的纳米网眼/纳米片结构具有较大的SSA（153.92 m ²/ g）具有大量可及的活性位点和Co ₃ O ₄与gC ₃ N ₄之间的大面积紧密界面，因此显着促进了电荷载流子的分离和运输。所制备的最佳的10％Co ₃ O ₄ / gC ₃ N ₄复合材料在可见光照射下表现出优异的四环素（TC）降解效率，并通过添加PMS进一步增强了降解效率。Co ₃ O ₄ / gC ₃ N _4中TC降解增强的机理基于催化剂的特性，TC降解效率评估，电子顺磁共振（EPR）测量和活性氧（ROSs）猝灭结果，对/ Vis / PMS系统进行了详细研究。根据气相色谱-质谱仪（GC-MS）测量确定的中间体，提出了TC降解途径。这项研究为在高活性gC ₃ N ₄基催化剂上通过PMS介导的光催化修复受污染的水提供了一条简便而有希望的途径。