Insightful study of the characterization of the Cobalt oxide nanomaterials and hydrothermal synthesis

In this paper, nanoparticles of cobalt oxide (Co3O4) are prepared at different temperatures 120 degrees C, 140 degrees C and 160 degrees C using the hydrothermal method. Cobalt nitrate hexahydrate: Co (NO3)(2) center dot 6H(2)O is used as precursor and potassium hydroxide (KOH) is used as precipitating agent. Particle size is controlled using precursor concentration. It is also investigated in this research that particle size increases at high-temperature. Nanoparticles of size between (13.62-17.81 nm) are obtained using this technique (Hydrothermal method). SEM results provide nonuniform distribution of nanoparticles with sharp grain boundaries. Electrical characterization confirms the semiconducting behavior of the material as resistivity decreases with increase in temperature. Electrochemical measurements show detection of hydrogen peroxide H2O2 by nanoparticles of Co3O4.

Automated summary

In this study, cobalt oxide (Co3O4) nanoparticles were prepared via the hydrothermal method at different temperatures (120°C, 140°C, and 160°C). Cobalt nitrate hexahydrate and potassium hydroxide were used as the precursor and precipitating agent, respectively. The size of nanoparticles was controlled by adjusting the precursor concentration, and it was found that the particle size increased at higher temperatures. Nanoparticles with sizes ranging from 13.62 nm to 17.81 nm were successfully obtained. SEM results revealed nonuniform distribution of nanoparticles and sharp grain boundaries. Electrical characterization confirmed the semiconducting behavior of the material, as the resistivity decreased with increasing temperature. Moreover, the Co3O4 nanoparticles showed excellent detection ability for hydrogen peroxide (H2O2) according to the electrochemical measurements.