Synthesis of nickel oxide nanoparticles by Sol-gel method

Abstract

Nickel oxide NPs are widely recognized as excellent photocatalysts due to their unique optical features such as bandgap energy, retention time, strong light absorption, electron-hole recombination duration, and significant negative oxidation potential of excited electrons. NiO nanoparticles were successfully created using a combination of nickel hexahydrate precursor, ethanol, and distilled water. Nickel hexahydrate NiO was employed as a nickel precursor to create nickel oxide nanoparticles (NO3).6H2O, distilled water, and stirring until solution homogeneity were used to make alkaline sodium hydroxide, and the alkaline solution was distilled into a homogenous solution on a magnetic stirrer at 75 °C. A thick green solution was produced at pH=12.The surface morphology and nanoparticle size of the as-prepared NiO nanoparticles were estimated using SEM and AFM images of spherical NiO particles with sizes of about 26.80 nm and 37.96 nm. The cubic crystal structure of NiO was disclosed using X-ray Diffraction (XRD). NiO NP absorption spectra in the UV and visible rangesShow blue has a maximum wavelength of 341 nm. The nickel oxide band is seen at 627 in Fourier transform infrared (FTIR) spectroscopy.