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

Gopinathan Manavalan*, Thiyagarajan Natarajan, Kayode Omotayo Adeniyi, Jyh Myng Zen, Solomon Tesfalidet, Mikael Thyrel, Torbjörn A. Lestander, Subba Reddy Alla, Jyri Pekka Mikkola

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)
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Abstract

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.

Original languageEnglish
Pages (from-to)18271-18279
Number of pages9
JournalIndustrial and Engineering Chemistry Research
Volume62
Issue number44
DOIs
Publication statusPublished - 8 Nov 2023
MoE publication typeA1 Journal article-refereed

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