Highly Efficient Electrochemical Ascorbic Acid Determination via a Cooperative Catalytic Effect of Dendritic Bi/Bi2O3 Junctions and Oxygen Vacancies

Shaddad, Maged N. and Alotaibi, Mshari A. and Alharthi, Abdulrahman I. and Alanazi, Abdulaziz A. and Arunachalam, Prabhakarn and Zebari, Salih M.S. and Al-Mayouf, Abdullah M. and Al-shalwi, Matar N. and Qahtan, Talal F. (2024) Highly Efficient Electrochemical Ascorbic Acid Determination via a Cooperative Catalytic Effect of Dendritic Bi/Bi2O3 Junctions and Oxygen Vacancies. Microchemical Journal, 204. pp. 1-10. ISSN 0026265X

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Abstract

This study developed an electrochemical sensor for ascorbic acid (AA) using dendritic nanostructured (DN) bismuth/bismuth oxide thin films with oxygen-deficient (SOD) surfaces (SOD-DN Bi/Bi2O3-x thin films) that were successfully fabricated through electrodeposition on fluorine-doped tin oxide (FTO) substrates. Using cyclic voltammetry and amperometry, we assessed electrocatalytic activity in neutral media. The prepared SOD-DN Bi/Bi2O3-x thin film was used, for the first time, as electrodes in a highly sensitive and selective electrochemical AA sensor. The SOD-DN Bi/Bi2O3-x thin film with optimal characteristics was shown to be ultrasensitive in AA detection in neutral conditions, whereby high detection sensitivity ∼ 2.30 µA µM-1cm−2 over a wide range of AA concentration ∼ 0.01 µM to 1.0 mM and working potential range ∼ 0.3–1.0 V vs. SCE. The results indicate that SOD-DN Bi/Bi2O3-x can provide large amounts of active reaction sites, thereby enhancing electrocatalytic activity and electrochemical sensitivity. Due to this, it is a unique electrochemical sensor able to detect AA without interference from DA, UA, or other contaminants. A further amperometric test demonstrated that this sensor was capable of detecting AA even under conditions of dopamine and uric acid. Accordingly, the proposed sensor provides a promising avenue for developing electrochemical sensing for AA determination. This strategy introduces a novel type of high-efficiency electrocatalyst for ultrasensitive detection of medical and environmental biomarkers.

Item Type: Article
Uncontrolled Keywords: Here’s the phrase split into one line as per your request: Determination via a Cooperative Catalytic Effect of Dendritic Bi/Bi2O3 Junctions and Oxygen Vacancies
Subjects: Q Science > QD Chemistry
T Technology > T Technology (General)
Divisions: Department of Nutrition > Research papers
Depositing User: ePrints Depositor
Date Deposited: 24 Nov 2024 10:31
Last Modified: 24 Nov 2024 10:31
URI: https://eprints.cihanuniversity.edu.iq/id/eprint/2794

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