Zheng Kewang, Liu Rui, Shen Lihang, Li Wei, Qin Caiqin
School of Chemistry and Materials Science, Hubei Engineering University, Xiaogan 432000, China.
Faculty of Engineering and Computing, The University of Sydney, Sydney, NSW 2050, Australia.
Molecules. 2025 Feb 21;30(5):1005. doi: 10.3390/molecules30051005.
Nitrogen-doped graphene-coated Fe nanoparticles (EC@NFe-700) were synthesized through the pyrolysis of a durian peel-supported urea ferric salt mixture. These materials were subsequently utilized to activate peroxymonosulfate (PMS) for oxidation of terramycin (TEC). The incorporation of an optimal amount of urea and ferric nitrate during the synthesis of materials significantly improves the catalytic activity of the resulting catalysts after pyrolysis. Using EC@NFe-700 catalyst at a concentration of 0.10 g L, 98.55% oxidation of 20 mg L TEC is achieved within 60 min. Additionally, EC@NFe-700 exhibits exceptionally low metal leaching, with levels remaining below 0.25 mg L. The EC@NFe-700 shows remarkable stability during oxidation and effectively resists interference, reusability, and robust stability throughout the oxidation process. The mechanism of the EC@NFe-700/PMS/TEC system is determined, and the O is the main reactive oxygen species (ROSs). The XPS analysis confirms that the primary active sites are Fe, as well as nitrogen-doped regions within the carbon matrix. This research demonstrates that by integrating iron and nitrogen with durian peel, it is possible to develop a PMS activator with satisfactory oxidation performance for the degradation of environmental pollutants.
通过热解榴莲皮负载的尿素铁盐混合物合成了氮掺杂石墨烯包覆的铁纳米颗粒（EC@NFe-700）。随后利用这些材料活化过一硫酸盐（PMS）以氧化土霉素（TEC）。在材料合成过程中加入适量的尿素和硝酸铁，显著提高了热解后所得催化剂的催化活性。使用浓度为0.10 g/L的EC@NFe-700催化剂，在60分钟内可实现对20 mg/L TEC的98.55%氧化。此外，EC@NFe-700的金属浸出率极低，含量保持在0.25 mg/L以下。EC@NFe-700在氧化过程中表现出显著的稳定性，有效抵抗干扰、具备可重复使用性且在整个氧化过程中具有强大的稳定性。确定了EC@NFe-700/PMS/TEC体系的作用机制，其中O是主要的活性氧物种（ROSs）。X射线光电子能谱分析证实主要活性位点是Fe以及碳基质中的氮掺杂区域。这项研究表明，通过将铁和氮与榴莲皮结合，可以开发出一种对环境污染物降解具有令人满意氧化性能的PMS活化剂。
