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Publication Type : Journal Article
Thematic Areas : Biotech
Publisher : Sensor Letters, American Scientific Publishers
Source : Sensor Letters, American Scientific Publishers, Volume 17, p.283-289 (2019)
Keywords : ELECTROCHEMICAL SENSOR; HYDROGEN PEROXIDE SENSOR; PALLADIUM NANOPARTICLES; REDUCED GRAPHENE OXIDE
Campus : Amritapuri, Coimbatore
School : School of Biotechnology
Center : Biosensor Research Lab, Biotechnology
Department : biotechnology, Sciences
Year : 2019
Abstract : A highly sensitive nonenzymatic hydrogen peroxide (H2O2) sensor was fabricated using palladium nanoparticles decorated reduced graphene oxide (Pd/rGO) nanocomposite. The Pd/rGO nanocomposite was prepared by single-step chemical reduction method. Nanocomposite was characterized by Raman spectroscopy, X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and high-resolution transmission electron microscopy (HRTEM). Screen printed electrodes (SPE) were fabricated, and the Pd/rGO nanocomposite was cast on the working electrode of the SPE. The Pd/rGO/SPE was electrochemically characterized by linear sweep voltammetry (LSV) and amperometry. The sensor exhibited extremely high electrocatalytic activity to H2O2 in neutral medium (pH = 7.4) with a wide linear range (from 10 μM to 4 mM), and very high sensitivity of 2104 μA mM–1 cm–2. The lower limit of detection found to be 0.5 μM. The Pd/rGO/SPE sensor demonstrated excellent features such as good reproducibility, long-term stability, and selectivity.
Cite this Research Publication : K. Dhara and Dr. Satheesh Babu T. G., “Electrochemical Nonenzymatic Detection of Hydrogen Peroxide at Pd Nanoparticles-Reduced Graphene Oxide Nanocomposite”, Sensor Letters, vol. 17, pp. 283-289, 2019.