In this paper, we report the synthesis of metal organic framework of uranium
1,2,4,5-benzene tetracarboxylic acid (U-H4btec 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 thermogravimetric analysis
(TGA/DTA). The morphology of the uranium 1,2,4,5-benzene tetracarboxylic 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-benzene
tetracarboxylic 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.