Alkhudaydi Amal M, Danish Ekram Y, Abdel Salam Mohamed
Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80200, Jeddah 21589, Saudi Arabia.
Department of Chemistry, Faculty of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia.
Molecules. 2024 Mar 19;29(6):1372. doi: 10.3390/molecules29061372.
In this work, a novel adsorbent called magnetite/MXene (FeO/TiC) nanocomposite was prepared, characterized, and applied for the removal of organic dye, malachite green dye (MG), from both real water and model solutions. Numerous techniques were used to characterize the prepared FeO/TiC nanocomposite: XRD, SEM, TEM, FTIR, and surface area analysis. The outcomes showed that the Al layer had been selectively etched, that the MAX phase (TiAlC) had been transformed into layered TiC MXene, that the cubic FeO phase had been prepared, and that the prepared FeO NPs had been evenly distributed on the MXene surface. Also, SEM pictures showed the successful etching of the MAX phase and the formation of the ultrathin multi-layered MXene, which the FeO NPs covered upon forming the FeO/TiC nanocomposite at the surface and inside the ultrathin multi-layered MXene. The effect of different operational parameters affecting the removal process was explored and optimized. The MG dye was removed mostly within 60 min, with a 4.68 mg/g removal capacity using 5 mg of the FeO/TiC nanocomposite. The removal was examined from both kinetic and thermodynamic perspectives, and the findings demonstrated the spontaneity of the removal process as well as the applicability of fractal-like pseudo-first-order and fractal-like pseudo-second-order kinetics when compared to other kinetics models. The FeO/TiC nanocomposite was used to remove MG dye from real spiked environmental water samples, and the results revealed the successful remediation of the real samples from the organic dye by the FeO/TiC nanocomposite. Accordingly, FeO/TiC nanocomposite could be considered a potential adsorbent for the environmental remediation of polluted water.
在本研究中，制备了一种新型吸附剂——磁铁矿/MXene（Fe₃O₄/Ti₃C₂）纳米复合材料，并对其进行了表征，用于去除实际水样和模拟溶液中的有机染料孔雀石绿（MG）。采用多种技术对制备的Fe₃O₄/Ti₃C₂纳米复合材料进行表征：X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、傅里叶变换红外光谱（FTIR）和比表面积分析。结果表明，Al层已被选择性蚀刻，MAX相（Ti₃AlC₂）已转变为层状Ti₃C₂ MXene，立方Fe₃O₄相已制备成功，且制备的Fe₃O₄纳米颗粒均匀分布在MXene表面。此外，SEM图片显示MAX相成功蚀刻以及超薄多层MXene的形成，在形成Fe₃O₄/Ti₃C₂纳米复合材料时，Fe₃O₄纳米颗粒覆盖在超薄多层MXene的表面和内部。研究并优化了影响去除过程的不同操作参数。MG染料在60分钟内基本被去除，使用5mg Fe₃O₄/Ti₃C₂纳米复合材料时去除容量为4.68mg/g。从动力学和热力学角度对去除过程进行了研究，结果表明该去除过程具有自发性，与其他动力学模型相比，分形类拟一级动力学和分形类拟二级动力学也适用。Fe₃O₄/Ti₃C₂纳米复合材料用于去除实际加标环境水样中的MG染料，结果表明Fe₃O₄/Ti₃C₂纳米复合材料成功修复了实际样品中的有机染料。因此，Fe₃O₄/Ti₃C₂纳米复合材料可被视为一种用于污染水环境修复的潜在吸附剂。
