Almahmoud Sondos A J, Alzahrani Soad S, Abdulkhair Babiker Y
Chemistry Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), PO. Box 90950, Riyadh 11623, Saudi Arabia.
ACS Omega. 2025 Mar 12;10(11):11188-11201. doi: 10.1021/acsomega.4c10353. eCollection 2025 Mar 25.
Herein, novel MgAlO-based quadruple nanocomposites containing different contents of Co/Ni bimetallic doping were synthesized employing gelatin as a green capping agent. Typically, MgAlO (MgAlO-1), 5% NiO-5% CoO@MgAlO (MgAlO-2), 2.5% CoO-5% NiO@MgAlO (MgAlO-3), and 5% CoO-2.5% NiO@MgAlO (MgAlO-4) were synthesized via a one-pot method. The prepared quadruple nanocomposites were characterized by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), surface analysis, and Fourier transform infrared spectroscopy (FTIR) spectroscopy. MgAlO-1, MgAlO-2, MgAlO-3, and MgAlO-4 exhibited surface areas of 75.4, 118.4, 141.1, and 123.0 m g, respectively, and possessed q values of 46.8, 60.9, 72.4, and 60.2 mg g, respectively, toward the indigo carmine (INCR) dye. The INCR sorption onto MgAlO-1, MgAlO-2, MgAlO-3, and MgAlO-4 followed the pseudo-second-order model, and the liquid film diffusion model controlled the INCR sorption onto MgAlO-1, MgAlO-2, MgAlO-3, and MgAlO-4 nanocomposites. MgAlO-3 was selected as the best sorbent for eliminating INCR, and it exhibited enhanced performance at pH 6.0. The MgAlO q value increased proportionally with the INCR concentration (20 to 100 mg L), and increasing the temperature affected the sorption positively, indicating endothermic sorption. The Langmuir model best fitted among the tested isotherm models, and it predicted a maximum adsorption capacity of 181.0 mg g. MgAlO-3 was tested for removing INCR from tap water, groundwater, and seawater at 313 K, and it showed an average efficiency of 97.1%, with a standard deviation of 2.4%.
在此，以明胶作为绿色封端剂，合成了含有不同含量Co/Ni双金属掺杂的新型MgAlO基四重纳米复合材料。具体而言，通过一锅法合成了MgAlO（MgAlO-1）、5%NiO-5%CoO@MgAlO（MgAlO-2）、2.5%CoO-5%NiO@MgAlO（MgAlO-3）和5%CoO-2.5%NiO@MgAlO（MgAlO-4）。通过透射电子显微镜（TEM）、能量色散X射线光谱（EDX）、X射线衍射（XRD）、表面分析和傅里叶变换红外光谱（FTIR）对制备的四重纳米复合材料进行了表征。MgAlO-1、MgAlO-2、MgAlO-3和MgAlO-4的表面积分别为75.4、118.4、141.1和123.0 m²/g，对靛蓝胭脂红（INCR）染料的q值分别为46.8、60.9、72.4和60.2 mg/g。INCR在MgAlO-1、MgAlO-2、MgAlO-3和MgAlO-4上的吸附遵循准二级模型，并且液膜扩散模型控制着INCR在MgAlO-1、MgAlO-2、MgAlO-3和MgAlO-4纳米复合材料上的吸附。MgAlO-3被选为去除INCR的最佳吸附剂，并且在pH 6.0时表现出增强的性能。MgAlO的q值与INCR浓度（20至100 mg/L）成比例增加，并且温度升高对吸附有积极影响，表明吸附为吸热过程。在所测试的等温模型中，Langmuir模型拟合效果最佳，并且预测最大吸附容量为181.0 mg/g。在313 K下对MgAlO-3去除自来水、地下水和海水中的INCR进行了测试，其平均效率为97.1%，标准偏差为2.4%。
