Mohammad Hosseini Nazila, Sheshmani Shabnam, Shahvelayati Ashraf S
Department of Chemistry, College of Basic Sciences, Yadegar-E-Imam Khomeini (RAH) Shahre Rey Branch, Islamic Azad University, Tehran, Iran.
Sci Rep. 2025 Jan 5;15(1):866. doi: 10.1038/s41598-024-84569-9.
This study presents the development and characterization of manganese ferrite (MnFeO)-based nanocomposites with graphite oxide (GO) and chitosan (CS) for efficient dye removal from textile wastewater and aqueous solution. Comprehensive characterization was performed using FT-IR, Raman, XRD, BET, SEM, DRS and Zeta potential techniques. XRD analysis confirmed the cubic spinel structure of MnFeO, with characteristic peaks at 2θ = 32, 35, 48, 53, 62, and 64°. BET analysis revealed a high specific surface area of 442.57 m/g and a pore diameter of 2.36 nm for the MnFeO/GO/CS nanocomposite. SEM imaging showed polyhedral MnFeO particles (11-33 nm) deposited on a wrinkled graphite oxide matrix. DRS analysis indicated band gap energies of 3.1 eV for MnFeO, 3.0 eV for MnFeO/GO, and 3.5 eV for MnFeO/GO/CS. Zeta potential measurements showed a positive surface charge (+ 36.8 mV) for MnFeO/GO/CS. The MnFeO/GO/CS nanocomposite exhibited exceptional photocatalytic performance under UV light irradiation. It achieved 99.9 and 99.5% removal of Reactive Red 198 dye and Brilliant Blue FCF 133, respectively. The photocatalytic process followed pseudo-second-order kinetics (R = 0.99). In real textile wastewater treatment, the nanocomposite reduced BOD from 889 to 0.86 mg/L and COD from 1227 to 74 mg/L, with 96% dye removal. Also, MnFeO/GO/CS showed excellent performance under sunlight irradiation and maintained high removal efficiencies over multiple cycles, demonstrating good reusability. This study highlights the potential of the MnFeO-based nanocomposites as versatile and sustainable solutions for remediating dye-contaminated water.
本研究介绍了基于锰铁氧体（MnFeO）与氧化石墨烯（GO）和壳聚糖（CS）的纳米复合材料的开发与表征，用于从纺织废水和水溶液中高效去除染料。使用傅里叶变换红外光谱（FT-IR）、拉曼光谱、X射线衍射（XRD）、比表面积分析仪（BET）、扫描电子显微镜（SEM）、漫反射光谱（DRS）和zeta电位技术进行了全面表征。XRD分析证实了MnFeO的立方尖晶石结构，在2θ = 32、35、48、53、62和64°处有特征峰。BET分析显示，MnFeO/GO/CS纳米复合材料的比表面积高达442.57 m/g，孔径为2.36 nm。SEM成像显示多面体MnFeO颗粒（11 - 33 nm）沉积在有皱纹的氧化石墨烯基质上。DRS分析表明，MnFeO的带隙能量为3.1 eV，MnFeO/GO为3.0 eV，MnFeO/GO/CS为3.5 eV。zeta电位测量显示MnFeO/GO/CS的表面电荷为正（+36.8 mV）。MnFeO/GO/CS纳米复合材料在紫外光照射下表现出优异的光催化性能。它分别实现了对活性红198染料和亮蓝FCF 133的99.9%和99.5%的去除率。光催化过程遵循准二级动力学（R = 0.99）。在实际纺织废水处理中，该纳米复合材料将生化需氧量（BOD）从889降至0.86 mg/L，化学需氧量（COD）从1227降至74 mg/L，染料去除率为96%。此外，MnFeO/GO/CS在阳光照射下表现出优异的性能，并且在多个循环中保持高去除效率，显示出良好的可重复使用性。本研究突出了基于MnFeO的纳米复合材料作为修复染料污染水的通用且可持续解决方案的潜力。
