• Haq, Muhammad Ahsan Ul
• Albaqami, Munirah D.
• Ahmad, Zubair
• Afzal, Amir
• Imran, Muhammad
• Iqbal, Muhammad Waqas

Abstract

<jats:p>Electrochemical sensors have attracted scientific interest because of their fast response, high sensitivity, low power loss and stability. Hydrothermally synthesis of porous VZnS and VZnS@ZnO nanocomposite prepared for supercapacitor electrode. This work aimed to increase the electrochemical efficiency of synthesized VZnS@ZnO nanostructures under electrochemical examination. The integrated structure of the VZnS@ZnO anode provides a significant amount of potential sites for divalent ion trapping and increases charge transfer kinetics. Consequently, the specific capacities of the VZnS and VZnS@ZnO anodes are 564.09 C g<jats:sup>−1</jats:sup> and 1025.39 C g<jats:sup>−1</jats:sup>, respectively. VZnS@ZnO and activated carbon (AC) are components in a supercapattery device configured as VZnS@ZnO//AC. Supercapattery device retains the highest 35.94 Wh kg<jats:sup>−1</jats:sup> energy density and an excellent 2512.54 W kg<jats:sup>−1</jats:sup> power density. According to the charge storage method study, the VZnS@ZnO//AC supercapattery stores charge via adsorption-desorption and Faradic processes. Besides, the VZnS@ZnO//AC hybrid device is used as an electrochemical sensor for glucose detection. The device showed a high sensitivity against the glucose and detected up to a small value. This research paves the way for high-performance VZnS@ZnO electrodes and expands our understanding of charge storage and electrolytic sensors to identify glucose.</jats:p>

Topics

• porous
• nanocomposite
• density
• impedance spectroscopy
• Carbon
• energy density