Mannaa Mohammed A, Mlahi Mosaad R, Al Maofari A, Ahmed Awad I, Hassan Shawky M
Chemistry Department, Faculty of Applied Science, Sa'adah University, Sa'adah 37970, Yemen.
Chemistry Department, Faculty of Science, Mansoura University, Mansoura 8080, Egypt.
ACS Omega. 2023 Jul 15;8(29):26379-26390. doi: 10.1021/acsomega.3c02911. eCollection 2023 Jul 25.
Mono-(Fe) and bimetallic Co-Fe-MOF with different Co and Fe contents was successfully synthesized by the solvothermal method. The structural properties of the prepared samples were characterized by X-ray diffraction, transmission electron microscopy (TEM), Brunauer-Emmett-Teller specific surface area, and Fourier transform infrared spectroscopy. The results revealed the successful formation of mono and mixed Co-Fe-MOF. Also, the results of TEM displayed that the particle structure of Co-Fe-MOF changed to octahedral after the addition of cobalt. The surface acidity results illustrated that the samples showed both Lewis and Brønsted acid sites, and Co-Fe-MOF possessed more surface acidity than Fe-MOF. The catalytic performance of the prepared samples was tested by synthesis of 14-phenyl-14-dibenzo [a, j] xanthene (xanthene), and bimetallic Co-Fe-MOF showed higher activity compared to monometallic Fe-MOF. The sample with Co-Fe-MOF gave the highest yield of xanthene with 90.2%. In addition, the prepared samples were used for removal of Pb and Cd ions from the aqueous solution. The sample with Co-Fe-MOF showed the highest removal efficiency compared with mono- and other bimetallic samples. The results illustrated that the addition of Co to Fe enhanced the structural properties, acidity, and catalytic performance of the prepared samples due to the synergistic effect between Fe and Co ions. According to the obtained results, the prepared samples showed great potentials for the synthesis of pharmacologically active compounds and environmental protection.
通过溶剂热法成功合成了具有不同钴和铁含量的单金属（铁）和双金属钴 - 铁金属有机框架材料（Co - Fe - MOF）。通过X射线衍射、透射电子显微镜（TEM）、布鲁诺尔 - 埃米特 - 泰勒比表面积和傅里叶变换红外光谱对制备样品的结构性质进行了表征。结果表明成功形成了单金属和混合的Co - Fe - MOF。此外，TEM结果显示添加钴后Co - Fe - MOF的颗粒结构变为八面体。表面酸度结果表明样品同时具有路易斯酸和布朗斯特酸位点，并且Co - Fe - MOF比Fe - MOF具有更多的表面酸度。通过合成1,4 - 二苯基 - 1,4 - 二苯并[a,j]呫吨（呫吨）测试了制备样品的催化性能，双金属Co - Fe - MOF比单金属Fe - MOF表现出更高的活性。含Co - Fe - MOF的样品呫吨产率最高，为90.2%。此外，将制备的样品用于从水溶液中去除铅和镉离子。与单金属和其他双金属样品相比，含Co - Fe - MOF的样品显示出最高的去除效率。结果表明，由于铁和钴离子之间的协同作用，向铁中添加钴增强了制备样品的结构性质、酸度和催化性能。根据所得结果，制备的样品在合成药理活性化合物和环境保护方面显示出巨大潜力。
