Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 3, Issue 21, Pages 11587-11595Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta01484k
Keywords
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Funding
- National Basic Research Program of China (973 Program) [2013CB933900]
- National Natural Science Foundation of China [20975076, 21375097, 21205090]
- Science Fund for Creative Research Groups of NSFC [20921062]
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A magnetic MOF composite was successfully prepared by a novel and green strategy through reasonable design. The nano Fe3O4@SiO2 core was first coated by a shell of Cu(OH)(2) as the self-template, followed by a conversion of Cu(OH)(2) into HKUST-1 at room temperature in a water-ethanol mixture solvent, and Fe3O4@SiO2@HKUST-1 core-shell nanostructures were obtained successfully. Based on this, a Bi-I-functionalized-magnetic HKUST-1 composite was prepared through a flexible coordination-based postsynthetic strategy. Powder X-ray diffraction spectrometry, N-2 sorption-desorption isotherms and Fourier transform infrared spectroscopy were used for the characterization of the magnetic MOF composites. The core-shell morphology was confirmed by transmission electron microscope images and the result of thermogravimetric analysis showed that the magnetic composites had excellent thermal stability. Besides, the adsorption of Hg2+ on Fe3O4@SiO2, Fe3O4@SiO2@HKUST-1 and Bi-I-functionalized magnetic MOF composites was investigated, and a good adsorption selectivity of Bi-I-functionalized magnetic MOF composites towards Hg2+ was demonstrated, with high adsorption capacity (264 mg g(-1)) and fast adsorption dynamics. The Bi-I-functionalized magnetic HKUST-1 composite was then successfully employed for the selective removal of Hg2+ from water, demonstrating great potential application of the prepared magnetic MOF composite as a fascinating adsorbent in environmental monitoring.
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