Molecularly imprinted polyaniline-polyvinyl sulphonic acid composite based sensor for para-nitrophenol detection
| Autor: | Abhijit Chandra Roy, Md. Azahar Ali, Chetna Dhand, Bansi D. Malhotra, V.S. Nisha |
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| Rok vydání: | 2013 |
| Předmět: |
Polymers
Biomedical Engineering Analytical chemistry Biosensing Techniques Biochemistry Analytical Chemistry Molecular Imprinting Nitrophenols Contact angle chemistry.chemical_compound Limit of Detection Spectroscopy Fourier Transform Infrared Polyaniline Environmental Chemistry Spectroscopy Conductive polymer Detection limit Aniline Compounds Molecular Structure Chemistry Reproducibility of Results Indium tin oxide Polymerization Microscopy Electron Scanning Polyvinyls Differential pulse voltammetry Sulfonic Acids Cyclic voltammetry Nuclear chemistry |
| Zdroj: | Analytica Chimica Acta. 777:63-71 |
| ISSN: | 0003-2670 |
| Popis: | 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 × 10 −3 mM, improved sensitivity as 1.5 × 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%. |
| Databáze: | OpenAIRE |
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