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Selenium Nanoneedles Deposited on Pencil Graphite Electrode for Hydrazine Sensing

Lookup NU author(s): Dr Shahid Rasul, Dr Abdul Zia, Professor Lidija Siller

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This is the authors' accepted manuscript of an article that has been published in its final definitive form by American Chemical Society, 2022.

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Abstract

The low toxicity of Se nanoparticles (NPs) deems it a suitable candidate for biomedical and sensing applications. Herein, we for the first time reported modifying a pencil graphite electrode with Se nanostructures (Se / PGE) by a facile chemical bath deposition (CBD) method. The Se / PGE exhibited outstanding, reproducible, and selective electrocatalytic activity for hydrazine determination. Hydrazine, a routine chemical in various industries, is toxic even in trace amounts and poses a serious threat due to its carcinogenic and mutagenic nature. Therefore, it is crucial to detect its presence in aqueous media. The Se / PGE exhibited outstanding, reproducible, and selective electrocatalytic activity for hydrazine determination. The Se / PGE displayed a stable amperometric response with a wide linear concentration range of 1 μM - 50 mM, LOQ of 90 nM, very low LOD of 45 nM, and a sensitivity of 0.813 μA.μM⁻¹.cm^-2. Moreover, Se / PGE showed a negligible response towards common interferences like NO₃^1-, CH₃COO^-1, phenol, and DMF at the selected applied potential. Applying the as-fabricated sensor for hydrazine detection in real-life samples (drinking water) showed satisfactory results with a recovery percentage of 96.9%. Further, our methodology paves the way to fabricate modified pencil graphite electrodes (PGE) through a convenient CBD method.

Publication metadata

Author(s): Ishtiag S, Sohail M, Rasul S, Zia AW, Siller L, Chotana G, Sharif M, Nafadi A

Publication type: Article

Publication status: Published

Journal: ACS Applied Nano Materials

Year: 2022

Volume: 5

Issue: 10

Pages: 14336-14346

Print publication date: 28/10/2022

Online publication date: 19/09/2022

Acceptance date: 07/09/2022

Date deposited: 22/09/2022

ISSN (electronic): 2574-0970

Publisher: American Chemical Society

URL: https://doi.org/10.1021/acsanm.2c02475

DOI: 10.1021/acsanm.2c02475

ePrints DOI: 10.57711/jshn-v888

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