Structural, optical and luminescence properties of pure, Fe-doped and glucose-capped CdO Semiconductor nanoparticles for their Antibacterial activity

Single-phase pure, Fe-doped and glucose-capped CdO nanoparticles (NPs) were prepared by a chemical precipitation method. The structure, morphology, composition, optical and luminescence properties of all samples were investigated using X-ray powder diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, photoluminescence (PL), and ultraviolet-visible (UV-Vis) spectroscopy. XRD study revealed the single-phase hexagonal crystal structure of all samples with P63/mmc space group. SEM detected the microstructural behaviour of all samples. The functional groups of the synthesized samples were also identified by FTIR spectroscopy. The calculated direct band energy values were estimated as 3.78 eV for pure, 3.65 eV for Fe-doped, and 3.63 eV for glucose-capped CdO NPs. From PL study, it was identified that glucose-capped CdO NPs showed the strongest photoluminescence signal (543 nm) comparing to the Fe-doped (436 nm) and pure (308 nm) CdO NPs. As compared to all samples, glucose-capped CdO NPs exhibited significant antibacterial activity against E. coli bacteria.