Advanced oxidation process (AOP) through the photocatalytic activation of peroxymonosulfate (PMS) has attracted much attention in wastewater treatment. Herein, a metal-free carbon quantum dots (CQDs) functioned polymer carbon nitride (PCN) was synthesized and used as an efficient photocatalyst for PMS activation toward bisphenol A (BPA) degradation under visible-light irradiation. The incorporation of CQDs in PCN endowed it with enlarged surface area, enhanced light absorption and improved charge separation, which were advantageous to photocatalytic activation of PMS. As a result, the CQDs functionalized carbon nitride exhibited an enhanced performance in photocatalytic activation of PMS toward BPA removal. The influencing factors such as catalyst dosage, PMS concentration, pH value, and anion additive on the photocatalytic performance were well examined. The catalyst exhibited a good cyclic stability. Furthermore, the reactive species and intermediates involved in BPA degradation were also investigated to elucidate the possible mineralization pathway of BPA. This work provides a facile synthetic strategy to prepare metal-free catalyst for photocatalytic activation of PMS in wastewater treatment.

通过过氧单硫酸盐（PMS）的光催化活化进行的高级氧化工艺（AOP）在废水处理中引起了广泛的关注。在这里，合成了无金属碳量子点（CQDs）功能的聚合物碳氮化物（PCN），并用作有效的光催化剂，用于PMS在可见光照射下活化为双酚A（BPA）降解。CQDs在PCN中的掺入使其具有更大的表面积，增强的光吸收和改善的电荷分离，这有利于PMS的光催化活化。结果，CQDs官能化的氮化碳在PMS去除BPA的光催化活化中表现出增强的性能。影响因素包括催化剂用量，PMS浓度，pH值，阴离子添加剂对光催化性能的影响也得到了很好的研究。该催化剂表现出良好的循环稳定性。此外，还研究了与BPA降解有关的反应性物种和中间体，以阐明BPA可能的矿化途径。这项工作提供了一种简便的合成策略，以制备用于废水处理中PMS的光催化活化的无金属催化剂。