Zango Zakariyya Uba, Jumbri Khairulazhar, Sambudi Nonni Soraya, Hanif Abu Bakar Noor Hana, Fathihah Abdullah Nor Ain, Basheer Chanbasha, Saad Bahruddin
Fundamental and Applied Sciences Department, Universiti Teknologi PETRONAS Seri Iskandar Perak Malaysia
Chemical Engineering Department, Universiti Teknologi PETRONAS Seri Iskandar Perak Malaysia.
RSC Adv. 2019 Dec 16;9(71):41490-41501. doi: 10.1039/c9ra08660a. eCollection 2019 Dec 13.
Three adsorbents based on the metal-organic frameworks (MOFs), ; MIL-88(Fe), NH-MIL-88(Fe), and mixed-MIL-88(Fe) were synthesized using a microwave-assisted solvothermal technique. The as-synthesized MOFs were characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), field emission scanning microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FTIR). The MOFs were shown to possess highly crystalline and porous structures with specific surface areas of 1240, 941, and 1025 m g and pore volumes of 0.7, 0.6 and 0.6 m g for MIL-88(Fe), NH-MIL-88(Fe) and mixed-MIL-88(Fe), respectively. Faster removal of a model polycyclic aromatic hydrocarbon, anthracene (ANT) within 25 minutes, was achieved when these MOFs were used as adsorbents in water. The removal efficiency was 98.3, 92.4 and 95.8% for MIL-88(Fe), NH-MIL-88(Fe) and mixed-MIL-88(Fe), respectively. The kinetics and isotherms of the process were best statistically described by pseudo-second-order and Langmuir models, respectively, while the thermodynamic studies revealed the exothermic and spontaneous nature of the process. Docking simulations were found to be consistent with the experimental results with MIL-88(Fe) showing the best binding capacity with the ANT molecule.
采用微波辅助溶剂热技术合成了三种基于金属有机框架（MOF）的吸附剂，即MIL-88(Fe)、NH-MIL-88(Fe)和混合MIL-88(Fe)。通过X射线衍射（XRD）、布鲁诺尔-埃米特-泰勒（BET）、场发射扫描显微镜（FESEM）、X射线光电子能谱（XPS）、热重分析（TGA）和傅里叶变换红外光谱（FTIR）对合成的MOF进行了表征。结果表明，MIL-88(Fe)、NH-MIL-88(Fe)和混合MIL-88(Fe)的MOF具有高度结晶和多孔结构，比表面积分别为1240、941和1025 m²/g，孔体积分别为0.7、0.6和0.6 m³/g。当这些MOF用作水中吸附剂时，在25分钟内能够更快地去除模型多环芳烃蒽（ANT）。MIL-88(Fe)、NH-MIL-88(Fe)和混合MIL-88(Fe)的去除效率分别为98.3%、92.4%和95.8%。该过程的动力学和等温线分别用伪二级模型和朗缪尔模型进行最佳统计描述，而热力学研究表明该过程具有放热和自发性质。对接模拟结果与实验结果一致，其中MIL-88(Fe)与ANT分子的结合能力最佳。
