期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 171, 期 -, 页码 1151-1158出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2012.06.054
关键词
Graphene oxide; Molecular imprinted polymer; Sensor; Adsorption; Dinitrophenol
资金
- National Science Foundation of China [21077037, 81030051, 21177044]
- National High Technology Research and Development Program of China (863 Program) [2012AA 06A 304]
- Fundamental Research Funds for the Central Universities of China [2011TS121, CZZ11008]
A simple surface molecular imprinted approach was developed to synthesize composites of molecular imprinted polymer (MIP) with graphene oxide (GO) in aqueous solution, where 2,4-dinitrophenol (DNP) was used as the template. The GO-MIP composites were characterized with, FT-IR, Raman spectroscopy, SEM and EDAX. The composites were demonstrated to have high adsorption capacity, excellent selectivity and site accessibility for the target pollutant DNP under optimal conditions. The composites were used to fabricate sensor for the determination of DNP, and the electrochemical behaviors of the sensor in the presence of DNP were investigated by cyclic voltammetry (CV), linear sweep voltammetry (LSV), and differential pulse voltammetry (DPV). Under optimal conditions by the DPV, there was a good linear correlation between the current of the cathodic peak at about -0.35 V (vs. saturated calomel electrode) and the concentration of DNP in the range of 1.0-150.0 mu M. The electrochemical sensor was satisfactorily applied to determine DNP in practical water samples. (C) 2012 Elsevier B.V. All rights reserved.
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