Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 152, Issue 2, Pages 292-298Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2010.12.022
Keywords
Molecularly imprinted polymers; Electrochemical sensor; Titanium oxide nanoparticles; Gold nanoparticles; 4-Nonylphenol determination
Funding
- National Natural Science Foundation of the People's Republic of China [30700535, 30972056, 30911140278]
- Foundation for Outstanding YoungScientist in Shandong Province [BS2009NY001]
- Scientific and Technological Development Plan in Shandong Province [2010GNC10960]
- Natural Science Foundation of Shandong Province [ZR2010DQ025]
- Shandong Province Higher Educational Science and Technology Program [J10LB14]
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4-Nonylphenol (4-NP) was reported to affect the health of wildlife and humans through altering endocrine function. A novel electrochemical sensor for sensitive and fast determination of 4-NP was developed. Titanium oxide (TiO2) nanoparticles and gold nanoparticles (AuNPs) were introduced for the enhancement of electron conduction and sensitivity. 4-NP-imprinted functionalized AuNPs composites with specific binding sites for 4-NP was modified on electrode. The resulting electrodes were characterized by cyclic voltammetry (CV). Rebinding experiments were carried out to determine the specific binding capacity and selective recognition. The linear range was over the range from 4.80 x 10(-4) to 9.50 x 10(-7) mol L-1, with the detection limit of 3.20 x 10(-7) mol L-1 (S/N = 3). The sensor was successfully employed to detect 4-NP in real samples. (C) 2010 Elsevier B.V. All rights reserved.
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