Advanced oxidation processes (AOP) based on nonradicals have attracted growing attentions because nonradical systems require much less oxidants and have low susceptibility to radical scavengers. Herein, a novel Fenton-like system that utilizes nonradicals was explored. It was derived from g-C₃N₄/MgO activated H₂O₂, and can reduce the H₂O₂ stoichiometry from 0.94%−0.18% to 0.03%. Sulfamethoxazole (SMX), a widely used sulfonamide, was used as the model pollutant to evaluate the efficacy of the system. It was observed for the first time that organic pollutants can be degraded with singlet oxygen (¹O₂) through a nonradical pathway in the g-C₃N₄/MgOH₂O₂ system. The reduced H₂O₂ consumption was the net result of continuously-recycled H₂O₂ from the reactions between H₂O₂ and g-C₃N₄/MgO. Based on experimental results and theoretical calculations, the synthesis of g-C₃N₄ and MgO forms a N-Mg bond with strong ability to absorb electrons and the electron transfer of H₂O₂ to N-Mg bonding is accelerated, activation of H₂O₂ to generate ¹O₂. Experimental data showed that organic pollutants can be degraded rapidly over a wide pH range. Findings of this study point to a cyclical but stable Fenton-like system with reduced H₂O₂ requirement for cost-effective remediation and treatment of organic pollutants and toxic wastes.

基于非自由基的高级氧化工艺（AOP）引起了越来越多的关注，因为非自由基体系所需的氧化剂少得多，并且对自由基清除剂的敏感性较低。在本文中，探索了一种利用非自由基的新颖的类似于Fenton的系统。它是由gC ₃ N ₄ / MgO活化的H ₂ O ₂衍生而来，可以将H ₂ O _2的化学计量比从0.94％-0.18％降低至0.03％。广泛使用的磺酰胺磺胺甲恶唑（SMX）被用作模型污染物，以评估该系统的功效。首次观察到单线态氧（¹ O ₂）通过gC ₃ N ₄ / MgO H ₂ O ₂系统中的非自由基途径。减少的H ₂ O ₂消耗量是H ₂ O ₂与gC ₃ N ₄ / MgO之间的反应连续循环的H ₂ O ₂的净结果。根据实验结果和理论计算，gC ₃ N ₄和MgO的合成形成了具有很强的吸收电子能力的N-Mg键，并且加速了H ₂ O ₂向N-Mg键的电子转移，激活了H₂ O ₂生成¹ O ₂。实验数据表明，有机污染物可以在很宽的pH范围内快速降解。这项研究的发现指向一种周期性但稳定的Fenton样系统，减少了H ₂ O _2的需求，从而可以经济有效地修复和处理有机污染物和有毒废物。