Abstract
In this study, plant-mediated synthesis of cadmium oxide nanoparticles (CdO NPs) have been reported using hydrazine as reducing agent and aqueous extract of Convolvulus arvensis as capping ligand. The synthesized nanomaterial was characterized by using different techniques like UV-visible, FT-IR, FESEM, XRD, EDS and TGA. FESEM image showed the average crystallite size to be 23 +/- 2 nm. TGA was carried out for thermal stability which showed that the synthesized nanoparticles were stable up to 365 degrees C. The electro-catalytic properties of synthesized nanomaterials were investigated for the oxidation of H2O2 and H2O. The response of the physically modified electrode was examined using cyclic voltammetry and DC potential amperometry (DCPA vs. Ag/AgCl reference electrode) in a phosphate buffer (pH = 7.0). The designed H2O2 biosensor illustrated high sensitivity 4.9757 mu A mM(-1) cm(-2), wide linear calibration range from 1 to 30 mM and detection limit of 1.6172 mM. The nanoparticles also displayed high electrocatalytic properties for the oxidation of water using linear sweep voltammetry.