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PVBA-UiO-66 hybrids using the flexible PVBA with multi-coordination groups as mixed ligands and their super adsorption towards methylene blue

Abstract

A series of poly-vinyl benzoic acid (PVBA) and UiO-66 materials (PVBA-UiO-66) were prepared by a mixed-linker approach. Using the flexible PVBA with multi-coordination groups as mixed ligands, mesopores and uncoordinated benzoic groups were introduced in the UiO-66 crystal structures, thus leading to the special structure and functionality. The structure of the PVBA-UiO-66 was characterized by powder X-ray diffraction (PXRD), scanning electron microscopy (SEM) and nitrogen gas adsorption measurements. The adsorption property toward methylene blue (MB) of PVBA-UiO-66 was studied. The adsorption of MB by UiO-66 and PVBA (43%)-UiO-66 fit the Langmuir model and Freundlich model well. The result showed PVBA (43%)-UiO-66 has the super adsorption capacity as high as 909 mg/g for MB owing to the mesopores and the uncomplexed carboxyl groups which were caused by the long PVBA involved in coordination. The adsorption kinetics of MB onto PVBA (43%)-UiO-66 can be well fitted to the pseudo-second-order model. The process of adsorption MB onto PVBA-UiO-66 is spontaneous and thermodynamically favorable at 303, 313 and 323 K.

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Publication details

The article was received on 16 Jan 2018, accepted on 05 Apr 2018 and first published on 07 Apr 2018


Article type: Paper
DOI: 10.1039/C8DT00184G
Citation: Dalton Trans., 2018, Accepted Manuscript
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    PVBA-UiO-66 hybrids using the flexible PVBA with multi-coordination groups as mixed ligands and their super adsorption towards methylene blue

    Y. Yang, Z. Niu, H. li, Y. Ma, Y. Zhang and H. Wang, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C8DT00184G

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