Traditional Fenton reaction takes place at a low pH and generates waste. Additionally, the storage and transportation of liquid H₂O₂ may pose safety risks. To overcome these disadvantages, an eco-friendly, efficient advanced oxidation process was established with ultrathin-C₃N₅ photocatalyst coupling sodium percarbonate (SPC). Under visible light irradiation, up to 93.97% of SMZ was removed within 120 min. Such efficient removal was attributed to the high carriers separation efficiency of U-C₃N₅, which was certified by DFT calculations and characterization methods. All the factors (various anions, pH values, fulvic acid, light sources, and water matrices) had a slight influence on SMZ degradation. Moreover, the toxicities of SMZ and its intermediates were reduced after degradation. Finally, a gelatin aerogel/U-C₃N₅ composite was obtained to facilitate the recycling of U-C₃N₅. This work highlights the combination of metal-free photocatalysis with SPC to degrade sulfonamide antibiotics and furthers the development of advanced oxidation process for micropollutant removal.

传统的芬顿反应在低 pH 值下发生并产生废物。此外，液态H ₂ O ₂的储存和运输可能会带来安全风险。_{为了克服这些缺点，采用超薄-C 3} N ₅光催化剂偶联过碳酸钠（SPC）建立了一种环保、高效的高级氧化工艺。在可见光照射下，120 分钟内去除高达 93.97% 的 SMZ。如此有效的去除归因于 UC ₃ N _{5的高载流子分离效率}，通过 DFT 计算和表征方法认证。所有因素（各种阴离子、pH 值、黄腐酸、光源和水基质）对 SMZ 降解都有轻微影响。此外，SMZ及其中间体的毒性在降解后降低。最后，获得了明胶气凝胶/UC ₃ N ₅复合材料，以促进UC ₃ N ₅的回收利用。这项工作突出了无金属光催化与 SPC 相结合以降解磺胺类抗生素，并进一步发展了用于去除微污染物的高级氧化工艺。