Abstract
Green extracts from plants, fruits, flowers are being explored worldwide to minimize the effect of toxic chemicals used in nanoparticles fabrication. The present work is based on the cadmium oxide nanoparticles (CdO NPs) were synthesized using Hibiscus rosa sinensis leaf extract at different volume concentration of 10 ml, 20 ml, 30 ml, 40 ml and 50 ml under bio synthesis process. The prepared samples were characterized by XRD, UV-DRS, PL, FT-IR, FE-SEM, EDX, HR-TEM analysis. The XRD pattern confirms the cubic structure with average particle size of 41.48 nm to 51.69 nm. The estimated band gap energy is found in the range 2.19 eV to 1.67 eV. Near UV and violet emission in PL spectrum leads the presence of crystal defects in CdO lattice. Presence of vibrational modes of chemical species in the samples, are characterized by Fourier Transform Infrared (FT-IR) spectrum. The elemental compositions are detected by using energy dispersive X-Ray analysis (EDAX). The particle size and morphology with intense magnification is confirmed by FE-SEM and TEM- SAED analysis. The antibacterial and fungal activities of Hibiscus rosa sinensis leaf extract CdO nanoparticles are tested for different bacterial organisms like Staphylococcus aureus, Bacillus substilis, Escherichia coli and Salmonella paratyphi and fungal organism like Candida albicans, Aspergillus niger and Aspergillus fumigates under the zone inhabitation method. The photocatalytic activities of the CdO samples on degradation of Methylene Blue azo dye under UV light irradiation are also studied.
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