Journal
APPLIED SURFACE SCIENCE
Volume 530, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2020.147254
Keywords
Magnetic composite; Covalent organic framework; Metal organic framework; Cu2+ detection; Solid phase extraction
Categories
Funding
- National Natural Science Foundation of China [21727811, 21675019]
Ask authors/readers for more resources
A novel magnetic composite, Fe3O4@metal organic framework@covalent organic framework (Fe3O4@MOF@COF), was first time prepared by solvothermal methods for selectively separation and preconcentration of Cu2+. The prepared Fe3O4@MOF@COF composite was thoroughly characterized with XPS, TENT, XRD and FT-IR et al. With a high density of nitrogen- and oxygen-containing functional groups on the surface, the Fe3O4@MOF@COF composite could efficiently extract and preconcentrate of Cu2+ ions in aqueous solutions, with a maximum Cu2+ adsorption capacity of 37.29 mg g(-1) determined by fitting the adsorption curve to the Langmuir isotherm equation. The magnetic composite after adsorption of Cu2+ was readily separated with an external magnet, and the retained copper could be stripped by acetic acid, which can effectively catalyze the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) by H2O2 with the detection of UV-vis spectrophotometry. The detection limit of this platform for Cu2+ is 37.6 nM (n = 11), along with a RSD of 4.14% (0.2 mu M, n = 13). It was validated by measurement of water samples and the comparison to graphite furnace atomic absorption spectrometry (GFAAS) was accomplished.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available