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Novel bimetallic Ag-Fe MOF for exceptional Cd and Cu removal and 3,4-dihydropyrimidinone synthesis
Journal of the Taiwan Institute of Chemical Engineers ( IF 5.7 ) Pub Date : 2020-10-05 , DOI: 10.1016/j.jtice.2020.09.028
W.S. Abo El-Yazeed , Y.G. Abou El-Reash , L.A. Elatwy , Awad I. Ahmed

Removing heavy metals from aqueous solutions has drawn the attention of scientists due to their serious global health challenges to human society. Thus, it is very important to use an adsorbent with a high removal efficiency of heavy metals and has the advantage of low-cost. In the present work, metal-organic framework with tailored components is very important in attaining the required purpose and expanding the developing applications. Herein, bimetallic Ag-Fe metal-organic framework has been successfully synthesized through a solvothermal method and characterized by Fourier transform infrared spectroscopy, X-ray diffraction, Scanning electron microscopy, Transmission electron microscopy and surface area measurements. Due to the synergistic contribution between Ag and Fe, bimetallic Ag-Fe metal-organic frameworks nanocrystals exhibit enhanced decontamination performance toward the removal of heavy metal ions with ultra-fast adsorption kinetics and high adsorption values. Impressively, an extraordinary Cadmium (II) and Copper (II) adsorption values up to 265 and 213 mg/g, respectively are obtained in bimetallic (0.6:1) Ag-Fe metal-organic framework, which considers the superior adsorbent between the prepared metal-organic frameworks. The surface acidity, examined through the nonaqueous potentiometric titration of n-butylamine, was found to be increased by the formation of a bimetallic metal-organic framework as well as the catalytic activity. Among various Ag: Fe, the ratio (0.6:1) showed the highest acidity and catalytic activity towards the synthesis of 3,4-dihydropyrimidinone. The metal-organic frameworks catalysts were found to maintain their adsorption capacity and catalytic activity even after four-time reusing.



中文翻译:

新型双金属Ag-Fe MOF可出色地去除Cd和Cu以及3,4-二氢嘧啶酮的合成

由于水溶液对人类社会的严重全球性挑战,因此从水溶液中去除重金属引起了科学家的关注。因此,使用具有高去除重金属效率并具有低成本优势的吸附剂非常重要。在目前的工作中,具有定制组件的金属有机框架对于实现所需目的和扩展开发应用非常重要。在此,通过溶剂热法成功地合成了双金属Ag-Fe金属-有机骨架,并通过傅里叶变换红外光谱,X射线衍射,扫描电子显微镜,透射电子显微镜和表面积测量来表征。由于银和铁之间的协同作用,双金属Ag-Fe金属-有机骨架纳米晶体具有超快的吸附动力学和高吸附值,在去除重金属离子方面表现出增强的去污性能。令人印象深刻的是,在双金属(0.6:1)Ag-Fe金属-有机骨架中,镉(II)和铜(II)的吸附值分别高达265和213 mg / g,这考虑到所制备的两种金属之间的优越吸附剂。金属有机框架。发现通过正丁胺的非水电位滴定法检查的表面酸度通过形成双金属金属-有机骨架以及催化活性而增加。在各种Ag:Fe中,比率(0.6:1)对3,4-二氢嘧啶酮的合成显示出最高的酸度和催化活性。

更新日期:2020-10-16
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