Electrochemically Modified Poly(dicyandiamide) Electrodes for Detecting Hydrazine in Neutral pH

A new technique for sensing nanomolar concentrations of hydrazine in water samples is reported. A screen-printed carbon electrode (SPCE) altered using an amine-azo functional group encompassing poly­(dicyandiamide) is used in this study. The modified electrode exhibits an enhanced activity toward hy...

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Published in:Industrial & engineering chemistry research 2023-11, Vol.62 (44), p.18271-18279
Main Authors: Manavalan, Gopinathan, Natarajan, Thiyagarajan, Adeniyi, Kayode Omotayo, Zen, Jyh-Myng, Tesfalidet, Solomon, Thyrel, Mikael, Lestander, Torbjörn A., Alla, Subba Reddy, Mikkola, Jyri-Pekka
Format: Article
Language:English
Subjects:
Annan kemiteknik
Applied Chemistry
Other Chemical Engineering
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Summary:A new technique for sensing nanomolar concentrations of hydrazine in water samples is reported. A screen-printed carbon electrode (SPCE) altered using an amine-azo functional group encompassing poly­(dicyandiamide) is used in this study. The modified electrode exhibits an enhanced activity toward hydrazine detection at a lower overpotential and broad linear scale between 20 nM and 1 mM, with an accurate sensitivity value of 0.1 nA μm–1 cm–2. To the best of our knowledge, poly­(dicyandiamide)-modified electrodes exhibit one of the lowest limits of detection for any metal-free electrode that detects 6.7 nM (S/N = 3) of hydrazine. The method established sufficient selectivity and better recoveries. Finally, the poly­(dicyandiamide)-modified SPCE* is highly suitable for electrochemical determination of hydrazine in water samples from tap and lake.
ISSN:0888-5885
1520-5045
1520-5045
DOI:10.1021/acs.iecr.3c02669