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This research work implies the development of a reliable, inexpensive, better and eco-friendly way to fabricate Cd(OH) 2 and CdO nanoparticles green synthesis approach using three different source materials. The veldt grape leaf act as a chelating agent. The physical properties of prepared samples were analyzed by various characterization techniques such as X-Ray Diffractometer, Fourier Transform Infra-Red, Scanning Electron Microscopy, X-Ray Energy Dispersive Spectrometer, High-Resolution Transmission Electron Microscopy and UV-Visible Spectrometer. The investigation of the structural analysis showed the existence of Cd(OH) 2 , mixed Cd(OH) 2 /CdO and CdO nanoparticles. The optical absorption wavelength at 294nm in UV-Vis spectra con rmed that the reduction of Cd 2+ ions. FTIR spectra display the vibrational modes of veldt grape leaf extract involved in chemical bonding and reductions. From EDAX spectrum con rmed the presence of Cd and O elements in the prepared samples. SEM and HRTEM images revealed nanorods, platelet and spherical shape morphologies with particle size ranging from 5.7 to 29nm. The photocatalytic activity of prepared nanoparticles was tested by degrading anionic and cationic dyes like congo red, methyl orange and crystal violet under UV-light irradiation. As well as antimicrobial activity was evaluated against gram-positive staphylococcus aureus, gram-negative proteus vulgaris and fungal-aspergillus niger. Comparing these three products CdO NPs exhibit high performance on both microbial and photocatalytic activity without a secondary product. Thus, the prepared CdO nanoparticles may further use in sewage treatment and biomedical applications.

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