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Issue 18, 2018
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PVBA-UiO-66 using a flexible PVBA with multi-coordination groups as mixed ligands and their super adsorption towards methylene blue

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Abstract

A series of poly-vinyl benzoic acid (PVBA) and UiO-66 materials (PVBA-UiO-66) were prepared by a mixed-linker approach. Using a flexible PVBA with multi-coordination groups as mixed ligands, mesopores and uncoordinated benzoic groups were introduced into the UiO-66 crystal structures, thus leading to a 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 that PVBA (43%)-UiO-66 has super adsorption capacity as high as 909 mg g−1 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.

Graphical abstract: PVBA-UiO-66 using a flexible PVBA with multi-coordination groups as mixed ligands and their super adsorption towards methylene blue

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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., 2018,47, 6538-6548
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    PVBA-UiO-66 using a 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, 47, 6538
    DOI: 10.1039/C8DT00184G

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