Synthesis of Metal-Organic Framework ZnO x -MOF@MnO 2 Composites for Selective Removal of Strontium Ions from Aqueous Solutions

A Zn(II)-based metal-organic framework (MOF) compound and MnO were used to prepare ZnO -MOF@MnO composites for selective Sr removal in aqueous solutions. The ZnO -MOF@MnO composites were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysi...

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Bibliographic Details
Published in:ACS omega 2020-04, Vol.5 (15), p.8721-8729
Main Authors: Choi, Jung-Weon, Park, Yoon-Ji, Choi, Sang-June
Format: Article
Language:English
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Summary:A Zn(II)-based metal-organic framework (MOF) compound and MnO were used to prepare ZnO -MOF@MnO composites for selective Sr removal in aqueous solutions. The ZnO -MOF@MnO composites were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, and Brunauer-Emmett-Teller surface area analysis. The functional groups, morphologies, thermal stabilities, and specific surface areas of the composites were suitable for Sr adsorption. A maximum adsorption capacity of 147.094 mg g was observed in batch adsorption experiments, and the sorption isotherms were fit well by the Freundlich model of multilayer adsorption. Adsorption reached equilibrium rapidly in kinetic experiments and followed the pseudo-second-order kinetic model. The adsorption capacity of the ZnO -MOF@MnO composite with the highest MnO content was high over a wide pH range, and the composite was highly selective toward Sr in solutions containing coexisting competing ions. Also, it has a good reusability for removing Sr .
ISSN:2470-1343
2470-1343
DOI:10.1021/acsomega.0c00228