Journal
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
Volume 102, Issue 17, Pages 5166-5178Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/03067319.2020.1791334
Keywords
Electropolymerisation; conducting polymers; polypyrrole; ionic liquids; electroanalysis; heavy metals; copper
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Funding
- International Science Program (ISP), University of Uppsala (Sweden)
- TWAS, The World Academy of Science for the Advancement of Science in developing countries under Research Grant [16-499RG/CHE/AF/AC_G-FR3240293299]
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Electropolymerisation of pyrrole was conducted in the presence of two ionic liquids, and the resulting PPy films were characterized using various electrochemical techniques. The PPy electrosynthesized with the presence of 1,2-dimethylimidazolium methylsulfate showed promising results for the detection of Cu(2+) using Differential Pulse Anodic Stripping Voltammetry.
Electropolymerisation of pyrrole was carried out in the presence of two ionic liquids: 1-hexyl-2,3-dimethylimidazolium tetrafluoroborate and 1,2-dimethylimidazolium methylsulfate. Electrochemical technics such as cyclic voltammetry, chronoamperometry and chronopotentiometry were used. The obtained PPy films were characterised by electrostability, electroactivity and electrochemical impedance spectroscopy. After electrosynthesis and electrocharacterisation, the PPy electrosynthesised in the presence of 1,2-dimethylimidazolium methylsulfate was applied to the detection of Cu(2+)in aqueous solutions, using Differential Pulse Anodic Stripping Voltammetry. We obtained a detection limit of 32 mg L(-1)for a sensitivity of 0.02 mu A cm(-2) mu M(-1)and a linear range of 3-8 mM.
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