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ARS Home » Midwest Area » Peoria, Illinois » National Center for Agricultural Utilization Research » Plant Polymer Research » Research » Publications at this Location » Publication #343483
Title: Polyaniline/cashew gum composite electrosynthesized on gold surface in aqueous acid medium for ammonia colorimetric detection

Author
item FELIX OLIVEIRA, MARIA - Universidade Federal Do Ceara (UFC)
item ARAUJO MELO, AIRIS - Universidade Federal Do Ceara (UFC)
item DO VALE ABREU, KATIANY - Universidade Estadual Do Ceara
item ALBUQUERQUE OLIVEIRA, MARÍLIA - Universidade Estadual Do Ceara
item FURTADO, ROSELAYNE - Embrapa
item Biswas, Atanu
item Cheng, Huai
item GONZÁLEZ, PILAR - Universidade Estadual Do Ceara
item ALVES, CARLUCIO - Universidade Federal Do Ceara (UFC)

Submitted to: Journal of the Electrochemical Society
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 6/12/2023
Publication Date: 6/28/2023
Citation: Felix Oliveira, M.R., Araujo Melo, A.M., do Vale Abreu, K., de Albuquerque Oliveira, M., Furtado, R.F., Biswas, A., Cheng, H.N., González, P.H., Alves, C.R. 2023. Polyaniline/cashew gum composite electrosynthesized on gold surface in aqueous acid medium for ammonia colorimetric detection. Journal of The Electrochemical Society. 170(6). https://doi.org/10.1149/1945-7111/ace003.
DOI: https://doi.org/10.1149/1945-7111/ace003

Interpretive Summary: We have developed a novel conductive biobased film from electrodeposition of polypyrrole/cashew gum. The use of biodegradable materials in electronic accessories can reduce the accumulation of persistent solid waste and mitigate serious environmental concerns. This material, obtained partly from a renewable resource, is a promising alternative for the development of new platforms for the immobilization of biomolecules; for example, it can possibly be used in biosensors.

Technical Abstract: The electrosynthesis of polyaniline (PAni) and cashew gum (CG) composite was successfully performed by electrochemical methods (potential scanning and constant potential) in terms of pH, aniline (Ani), and polyelectrolyte concentrations. Study aim was to investigate the performance of a polyaniline-based ammonia sensor under different concentrations of ammonium gas, evidencing a color change from green to blue as in the presence of gas in a sensitive and reversible process. Films grown by cyclic voltammetry and chronoamperometry showed a cauliflower-like morphology, and a visual analysis detected a limit of 0.015 and 0.010 mol l-1, respectively. The sensor demonstrated a fast response time of 20 s, a low detection limit, with a short regeneration time of less than 1 min at room temperature. This polyaniline-based sensor is shown as a portable, sensitive, dimensionally flexible, and cost-effective alternative for food packaging and other devices. The findings of this study contribute to the development of advanced ammonia detection technology.