期刊
ANALYTICA CHIMICA ACTA
卷 777, 期 -, 页码 63-71出版社
ELSEVIER
DOI: 10.1016/j.aca.2013.03.014
关键词
Molecular imprinting; Conducting polymer; Polyaniline; Para-nitrophenol; Polyvinyl sulphonic acid
资金
- Department of Science and Technology project [DST/TSG/2008/18]
- Indian Council of Medical Research [513/8/91/GM/2010-RHN]
- CSIR, India
We report results of the studies relating to the fabrication and characterization of a conducting polymer based molecularly imprinted para-nitrophenol (PNP) sensor. A water pollutant, para-nitrophenol is electrochemically imprinted with polyvinyl sulphonic acid (PVSA) doped polyaniline onto indium tin oxide (ITO) glass substrate. This PNP imprinted electrode (PNPI-PANI-PVSA/ITO) prepared via chronopotentiometric polymerization and over-oxidation is characterized by Fourier transform infra-red spectroscopy (FT-IR), UV-visible (UV-vis) spectroscopy, contact angle (CA), scanning electron microscopy (SEM), cyclic voltammetry (CV) and differential pulse voltammetry (DPV) studies. The response studies of PNPI-PANI-PVSA/ITO electrode carried out using DPV reveal a lower detection limit of 1 x 10(-3) mM, improved sensitivity as 1.5 x 10(-3) A mM(-1) and stability of 45 days. The PNPI-PANI-PVSA/ITO electrode shows good precision with relative standard deviation of 2.1% and good reproducibility with standard deviation of 3.78%. (C) 2013 Elsevier B.V. All rights reserved.
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