Electrocatalytic determination of ascorbic acid using a green synthesised magnetite nano-flake modified carbon paste electrode by cyclic voltammetric method. (7th June 2022)

• Record Type: Journal Article
• Authors: Shashanka, Rajendrachari; Jayaprakash, Gururaj Kudur; B.G, Prakashaiah; Kumar, Mohan; Kumara Swamy, B.E
• Is Part Of: Materials research innovations. Volume 26:Number 4(2022)
• Page Start: 229
• Page End: 239
• Publication Date: 2022-06-07
• Subjects: Fe3O4 nano-flakes -- Alchemilla Vulgaris -- green synthesis -- activation energy -- electrocatalyst -- ascorbic acid; Materials -- Research -- Periodicals; Matériaux -- Recherche -- Périodiques; 620.1105
• DOI: 10.1080/14328917.2021.1945795
• Languages: English
• ISSNs: 1432-8917

Abstract

ABSTRACT: In the present paper, aqueous extracts of Alchemilla Vulgaris (Aslan Pençesi) leaves have been used to prepare Fe3 O4 nano-flakes accompanied by calcination at 400°C. The various properties of biosynthesised Fe3 O4 nano-flakes were investigated using UV–Visible, Fourier-transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), X-Ray diffraction (XRD), cyclic voltammetry, thermogravimetric (TG), and differential thermal analysis (DTA) respectively. The SEM study reveals the formation of flake-like structure with a diameter of 85 nm and a thickness of 9 nm respectively. The DTA curve shows two endothermic peaks corresponding to the decomposition of organic matter and the deoxidation of FeO (Wustite) to α-Fe, respectively, and their activation energy values were found to be 5.73 and 16.43 kJ/moles, respectively. The green synthesised magnetite nano-flakes is proved to be an excellent electrocatalyst for the electro-oxidation of ascorbic acid. The effect of scan rates, the concentration of the modifier, and the analyte was also investigated.