One‐pot synthesis of magnetic zeolitic imidazolate framework/grapheme oxide composites for the extraction of neonicotinoid insecticides from environmental water samples

Magnetic zeolitic imidazolate framework 67/graphene oxide composites were synthesized by one‐pot method at room temperature for the first time. Electrostatic interactions between positively charged metal ions and both negatively charged graphene oxide and Fe3O4 nanoparticles were expected to chemica...

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Bibliographic Details
Published in:Journal of separation science 2017-12, Vol.40 (24), p.4747-4756
Main Authors: Cao, Xiaolin, Jiang, Zejun, Wang, Shanshan, Hong, Sihui, Li, Hui, Shao, Yong, She, Yongxin, Wang, Jing, Jin, Fen, Jin, Maojun
Format: Article
Language:English
Subjects:
Analytical chemistry
Carbon dioxide
Cobalt
Correlation analysis
Correlation coefficients
Feasibility studies
Graphene
graphene oxide
Insecticides
Iron oxides
Linearity
magnetic solid‐phase extraction
Metal-organic frameworks
Nanoparticles
neonicotinoid insecticides
Pathogens
Protozoa
zeolitic imidazolate frameworks
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Summary:Magnetic zeolitic imidazolate framework 67/graphene oxide composites were synthesized by one‐pot method at room temperature for the first time. Electrostatic interactions between positively charged metal ions and both negatively charged graphene oxide and Fe3O4 nanoparticles were expected to chemically stabilize magnetic composites to generate homogeneous magnetic products. The additional amount of graphene oxide and stirring time of graphene oxide, Co2+, and Fe3O4 solution were investigated. The zeolitic imidazolate framework 67 and Fe3O4 nanoparticles were uniformly attached on the surface of graphene oxide. The composites were applied to magnetic solid‐phase extraction of five neonicotinoid insecticides in environmental water samples. The main experimental parameters such as amount of added magnetic composites, extraction pH, ionic strength, and desorption solvent were optimized to increase the capacity of adsorbing neonicotinoid insecticides. The results show limits of detection at signal‐to‐noise ratio of 3 were 0.06–1.0 ng/mL under optimal conditions. All analytes exhibited good linearity with correlation coefficients of higher than 0.9915. The relative standard deviations for five neonicotinoid insecticides in environmental samples ranged from 1.8 to 16.5%, and good recoveries from 83.5 to 117.0% were obtained, indicating that magnetic zeolitic imidazolate framework 67/graphene oxide composites were feasible for analysis of trace analytes in environmental water samples.
ISSN:1615-9306
1615-9314
DOI:10.1002/jssc.201700674