Department of Chemical Sciences, University of Johannesburg, South Africa; Centre for Nanomaterials Science Research, University of Johannesburg, South Africa.
Department of Chemical Sciences, University of Johannesburg, South Africa.
Chemosphere. 2023 Oct;339:139698. doi: 10.1016/j.chemosphere.2023.139698. Epub 2023 Jul 31.
We report the preparation and application of poly (ethylene) glycol (PEG) coated magnetite nanoparticles (MNPs) catalyst for the heterogeneous electro-Fenton (HEF) degradation of sulfamethoxazole in real wastewater PEG-coated MNPs of four MNP:PEG ratios were synthesised using the co-precipitation method. The synthesised MNP were characterised using FTIR, XRD, EDX, TEM, and CHN elemental analysis. It was observed that the coating of MNP with PEG influences the nanoparticle size, agglomeration tendencies and catalytic efficiency of MNPs properties in the HEF degradation process. A 1:1 optimal MNP:PEG catalyst yielded 91% sulfamethoxazole degradation and 48% total organic carbon removal in 60 min, which is an improvement of 11% over degradation with the uncoated MNP. The PEG-coated MNP showed higher stability in 10 consecutive reaction cycles, reduced leaching, and improved performance at a lower dosage and broader pH range than the uncoated MNPs. These results show that coating MNP with PEG enhances HEF catalytic performance in the degradation of sulfamethoxazole in wastewater.
我们报告了聚乙二醇（PEG）包覆的磁铁矿纳米粒子（MNPs）催化剂的制备和应用，用于实际废水中磺胺甲恶唑的非均相电-Fenton（HEF）降解。使用共沉淀法合成了四种 MNP:PEG 比例的 PEG 包覆 MNPs。通过傅里叶变换红外光谱（FTIR）、X 射线衍射（XRD）、能谱（EDX）、透射电子显微镜（TEM）和元素分析（CHN）对合成的 MNP 进行了表征。结果表明，PEG 对 MNP 的包覆影响了纳米颗粒的尺寸、团聚趋势和催化效率，从而影响了 MNPs 在 HEF 降解过程中的性能。在 60 分钟内，最佳的 MNP:PEG 催化剂（比例为 1:1）可使磺胺甲恶唑降解 91%，总有机碳去除率为 48%，比未包覆的 MNP 降解提高了 11%。PEG 包覆的 MNP 在 10 次连续反应循环中表现出更高的稳定性、更少的浸出、更低的剂量和更宽的 pH 范围下的性能改善。这些结果表明，PEG 包覆 MNP 可增强 HEF 在废水中磺胺甲恶唑降解中的催化性能。
