期刊
HEMIJSKA INDUSTRIJA
卷 70, 期 5, 页码 565-572出版社
ASSOC CHEMICAL ENGINEERS SERBIA
DOI: 10.2298/HEMIND150609065V
关键词
adsorption; physisorption; metal organic frameworks; 1,2,4,5-benzenetetracarboxylic acid; uranyl acetate dehydrate; SEM
资金
- Faculty of Applied and Computer Science Research and Publications Committee of Vaal University of Technology, Vanderbijlpark, Republic of South Africa
In this paper, we report the synthesis of metal organic framework of uranium 1,2,4,5-benzenetetracarboxylic acid (U-H(4)btec MOF) by solvothermal method. The obtained MOF was characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction spectroscopy (XRD), energy dispersive spectroscopy (EDS), thermogravimetric and differential thermos-gravimetric analysis (TGA/DTA). The morphology of the uranium 1,2,4,5-benzenetetracarboxylic acid MOF observed by SEM, revealed the presence of flaky porous structure. Adsorption of Cr3+ from aqueous solution onto the uranium 1,2,4,5-benzenetetracarboxylic acid MOF was systematically studied. Langmuir and Freundlich adsorption isotherms were applied to determine the adsorption capacity of the MOF to form a monolayer. Kinetic determination of the adsorption of Cr3+ suggested both chemisorption and physisorption probably due to the presence of carbonyl groups within the MOF and its porous structure.
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