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- Title
Rapid magnetic solid-phase extraction of Congo Red and Basic Red 2 from aqueous solution by ZIF-8@CoFe<sub>2</sub>O<sub>4</sub> hybrid composites.
- Authors
Xu, Yan; Jin, Jingjie; Li, Xianliang; Han, Yide; Meng, Hao; Wu, Junbiao; Zhang, Xia
- Abstract
Core-shell metal-organic framework materials have attracted considerable attention mainly due to their enhanced or new physicochemical properties compared with their single-component counterparts. In this work, a core-shell heterostructure of CoFe2O4-Zeolitic Imidazolate Framework-8 (ZIF-8@CoFe2O4) is successfully fabricated and used as an solid-phase extraction adsorbent to efficiently extract Congo Red and Basic Red 2 dyes from contaminated aqueous solution. Vibrating sample magnetometry indicates that the saturated magnetization of ZIF-8@CoFe2O4 is 3.3 emu/g, which is large enough for magnetic separation. The obtained hybrid magnetic metal-organic framework based material ZIF-8@CoFe2O4 can remove the investigated dyes very fast within 1 min of the contact time. The adsorbent ZIF-8@CoFe2O4 also shows a good reusability. After regeneration, the adsorbent can still exhibit high removal efficiency (∼97%) toward Congo Red for five cycles of desorption-adsorption. This work reveals the great potential of core-shell ZIF-8@CoFe2O4 sorbents for the fast separation and preconcentration of organic pollutants in aqueous solution before high-performance liquid chromatography analysis.
- Subjects
SOLID phase extraction; CONGO red (Staining dye); PARAROSANILINE; AQUEOUS solutions; MAGNETIC separation
- Publication
Journal of Separation Science, 2016, Vol 39, Issue 18, p3647
- ISSN
1615-9306
- Publication type
Article
- DOI
10.1002/jssc.201600630