Bulletin of the Chemical Society of Ethiopia

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Application of a water stable zinc(II) glutamate metal organic framework for photocatalytic degradation of organic dyes

W. P. Wu, W. C. Liu, S. W. Qiu, A. Q. Ma, W. Dai, Y. Qian, A. Kumar


A water stable metal-organic framework (MOF) having structural formula {[Zn(H2O)(L)]∙xsolvent}n (L = glutamate) (1), was prepared in aqueous medium by simple mixing the Zn(II) salt and glutamate ligand at room temperature. The single crystal X-ray diffraction study indicates that 1 crystallizes in an orthorhombic system with a space group of P212121 in which the Zn(II) center adopts pseudo-octahedral geometry. The bridging interactions through carboxylate groups in 1 generates a 2D structure in 1 comprising of the microporous channels. The UV/Vis diffuse-reflection spectroscopy for 1 had been performed which indicated that MOF possess semiconducting nature with a band gap of 3.23 eV and therefore may be a potential candidate as photocatalyst. The photocatalytic behavior of 1 against photo-degratdation of organic dyes has been investigated. The possible photocatalytic activity of 1 against organic dyes have been addressed using density of states (DOS) calculations.


KEY WORDS: Glutamate, MOF, DOS, Photocatalysis


Bull. Chem. Soc. Ethiop. 2019, 33(1), 43-50

AJOL African Journals Online