Bifunctional electrode of bismuth tungsten for electrochemical sensing applications

Abdullah K Alanazi; P Senthil Kumar; M Ramya; Hala M Abo-Dief; Gayathri Rangasamy

doi:10.1016/j.chemosphere.2023.139014

Bifunctional electrode of bismuth tungsten for electrochemical sensing applications

Chemosphere. 2023 Sep:334:139014. doi: 10.1016/j.chemosphere.2023.139014. Epub 2023 May 22.

Authors

Abdullah K Alanazi¹, P Senthil Kumar², M Ramya³, Hala M Abo-Dief⁴, Gayathri Rangasamy⁵

Affiliations

¹ Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia.
² Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, 603110, Tamil Nadu, India; Centre of Excellence in Water Research (CEWAR), Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, 603110, Tamil Nadu, India; Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia. Electronic address: [email protected].
³ Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, 603110, Tamil Nadu, India; Centre of Excellence in Water Research (CEWAR), Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, 603110, Tamil Nadu, India.
⁴ Department of Science and Technology, University College-Ranyah, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia.
⁵ Department of Sustainable Engineering, Institute of Biotechnology, Saveetha School of Engineering, SIMATS, Chennai, 602105, India; School of Engineering, Lebanese American University, Byblos, Lebanon.

PMID: 37224979
DOI: 10.1016/j.chemosphere.2023.139014

Abstract

A co-precipitation technique has been used to prepare Bismuth tungstate nanoparticles (Bi₂WO₆) for electrochemical capacitors and electrochemical sensing of Ascorbic acid (AA). Using a scanning rate of 10 mV s ^-1, the electrode was performed as the pseudocapacitance behavior and the specific capacitance to be up to 677 Fg ^-1 at 1 A/g. Bi₂WO₆ versus Glassy carbon electrode (GCE) was also used to study the behavior of the Bi₂WO₆ modified electrodes in detecting ascorbic acid. This electrochemical sensor shows excellent electrocatalytic performance when ascorbic acid is present, as determined by differential pulse voltammetry. In solution, ascorbic acid diffuses to an electrode surface and controls its surface properties. Based on the results from the investigation, the sensor showed a detection sensitivity of 0.26 mM/mA, and a limit of detection (LOD) of 77.85 mM. It is clear from these results that Bi₂WO₆ may find application as an electrode material for supercapacitors and glucose sensors.

Keywords: Ascorbic acid; Bi(2)WO(6); Nanocomposite; Sensing; Supercapacitors.

MeSH terms

Ascorbic Acid / chemistry
Bismuth
Electrochemical Techniques / methods
Electrodes
Metal Nanoparticles* / chemistry
Tungsten* / chemistry

Substances

Tungsten
Bismuth
Ascorbic Acid