Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 22, Issue 30, Pages 10565-10571Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201600817
Keywords
adsorption; dyes; pigments; membranes; metal-organic frameworks; nanoparticles
Categories
Funding
- NSFC [21475078, 21271120]
- 973 Program [2012CB821705, 2013CB933800]
- Taishan Scholar's Construction Project
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Metal-organic frameworks (MOFs) are widely used as porous materials in the fields of adsorption and separation. However, their practical application is largely hindered by limitations to their processability. Herein, new UiO-66-Urea-based flexible membranes with MOF loadings of 50 (1), 60 (2), and 70wt% (3) were designed and prepared by post-synthetic polymerization of UiO-66-NH2 nanoparticles and a polyurethane oligomer under mild conditions. The adsorption behavior of membrane 3 towards four hydrophilic dyes, namely, eosinY (EY), rhodamineB (RB), malachite green (MG), and methylene blue (MB), in aqueous solution was studied in detail. It exhibits strong adsorption of EY and RB but weak adsorption of MG and MB in aqueous solution. Owing to the selective adsorption of these hydrophilic dyes, membrane 3 can remove EY and RB from aqueous solution and completely separate EY/MB, RB/MG, and RB/MB mixtures in aqueous solution. In addition, the membrane is uniformly textured, easily handled, and can be reused for dye adsorption and separation.
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