: In recent days, the removal of adulterants from the water is furthered by photocatalytic activity. The photocatalytic activity (PCA) of proposes it as a significant catalyst. The nanoparticle reacts with the dye molecule and purifies the adulterant present in the contaminated water. The hydrothermal method is adapted to synthesize CdO nanoparticles. The synthesized CdO nanoparticle powder is characterized. The CdO nanoparticle of the crystallite size is 36nm, determined using X-ray diffraction (XRD) analysis, and the W-H plot is used to find the strain. The high-resolution scanning electron microscope (HR-SEM) and transmission electron microscope (TEM) studies show the morphology as a spherical shape. The Fourier transform infrared spectroscopy (FTIR) analysis assists in finding the functional groups. The band gap of the nanoparticles is 2.10 eV. The electrical behaviours of the CdO nanoparticle are thoroughly studied. The enhancement of the PCA of the obtained catalyst is the focus of this work. The CdO nanoparticles give more efficiency.
