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Facile Fabrication of Magnetic Metal-Organic Framework Composites for the Highly Selective Removal of Cationic Dyes

Authors :
Ning Zhang
Zhouqing Xu
Huijun Li
Yaling He
Qingqing Li
Yuan Wang
Source :
Materials, Materials; Volume 11; Issue 5; Pages: 744, Materials, Vol 11, Iss 5, p 744 (2018)
Publication Year :
2018

Abstract

In this work, we show a novel magnetic composite material Fe3O4@HPU-9 (HPU-9 = {[Cd(L)0.5(H2O)](DMA)(CH3CN)}n) (H4L = 1,1′-di(3,5-dicarbonylbenzyl)-2,2′bimidazoline, DMA = N,N-dimethylacetamide) constructed by in situ growth of HPU-9 on Fe3O4, which has excellent absorption of cationic dyes from aqueous solution. The Fe3O4@HPU-9 particle possesses a well-defined core-shell structure consisting of a Fe3O4 core (diameter: 190 nm) and a HPU-9 shell (thickness: 10 nm). In the composite, the HPU-9 shell contributes to the capsulation of cationic dyes through electrostatic attractions between HPU-9 and cationic dyes, while the Fe3O4 core serves as magnetic particle. The maximum absorption capacity of Fe3O4@HPU-9 for R6G was 362.318 mg·g−1. The absorption kinetics data were well described by a psedo-second-order model (R2 > 0.99), and the equilibrium data were also well fitted to Langmuir isotherm model (R2 > 0.99). Our data confirmed that the proposed magnetic composite could be recycled and reused several times without centrifugal separation, making it more convenient, economic and efficient than common adsorbents.

Details

ISSN :
19961944
Volume :
11
Issue :
5
Database :
OpenAIRE
Journal :
Materials (Basel, Switzerland)
Accession number :
edsair.doi.dedup.....7af525e9f6ab14da0ee1f96014489f1e