Search

Binary metal oxide, nickel-cobalt oxide (NiCo2O4), was hydrothermally synthesized for the successful utilization as electrochemical electrode in chemical sensor. Benefited from the large surface area, binary NiCo2O4 stacked hexagonal nanoplates (HNPs) based electrode was utilized for the electrochemical sensing application towards teratogenic chemical i.e. 3-methoxypropionitrile (3-MPN). The sensing results displayed a reproducible sensitivity of ~605 μAμM−1cm−2, detection limit of ~11.8 μM with the correlation coefficient (R) of ~0.99502 and good linearity from ~10 μM to ~100 μM. Stability and repeatability of binary NiCo2O4 stacked HNPs based electrode was investigated with satisfactory results. Our synthesized binary NiCo2O4 stacked HNPs based electrode is promising for sensor applications and thus, enlightens the possibility of synthesizing other binary oxide materials.

Porous cobalt oxide (Co3O4) nanocubes (NCs) were synthesized by a simple and cost-effective hydrothermal technique for the potential application of electrochemical supercapacitors. The hydrothermally synthesized materials exhibited the small cube like morphology with the average size of ~ 50 to 60 nm. The surface analysis revealed a good surface area, and high pore volume of the synthesized porous Co3O4 NCs. The capacitive properties of porous Co3O4 NCs electrode were investigated by cyclic voltammetry (CV) in 6 M KOH electrolyte and a high specific capacitance of ~ 430.6 F/g at a scan rate of ~ 10 mV s−1 was observed. The capacity retention of up to ~ 85% after 1000 cycles was shown by the fabricated porous Co3O4 NCs electrode. The porous Co3O4 NCs showed excellent structural stability through cycling with promising capacity retention which suggested a good quality of porous Co3O4 NCs as electrochemical supercapacitor electrode.

A facile and eco-friendly biosynthetic method was employed to synthesize NiO nanoparticles (NPs) using leaf extract of plant Calotropis gigantea. The crystalline and structural characterizations confirmed the formation of NiO NPs. A possible mechanism was proposed to explain the formation of NiO NPs through the plant assisted synthesis. The catalytic effect of biosynthesized NiO NPs on thermal decomposition of ammonium perchlorate (AP) and burning rate of composite solid propellants (CSPs) has been analyzed. The Kinetic studies of slow and rapid thermal decomposition have also been done.