Effect of Doping Manganese on the Morphological, Optical, and Thermal Properties of Zinc Oxide Nanoparticles Embedded on Poly-(p-anisidine)
J. Environ. Nanotechnol., Volume 13, No 4 (2024) pp. 485-492
Abstract
Metal-doped nanoparticles are of great interest for their multifunctionality and versatile applications. Recent research has focused on analyzing the morphological and optical properties of zinc oxide nanoparticles. Nanostructured materials find diverse uses as corrosion inhibitors, sunscreen agents, anti-scratch coatings, and stain removers, driving the need for novel materials with specific properties. The present work analyzed the structural, optical, and thermal properties of ZnO and Mn/ZnO nanoparticles, poly-(p-anisidine) (PPA), and ZnO-PPA, Mn/ZnO-PPA nanocomposites by various techniques including X-Ray diffraction, Fourier transform infra-red spectroscopy, scanning electron microscopy, energy dispersive studies, ultra-violet-visible spectroscopy, and photoluminescence studies. The XRD results confirmed the wurtzite type structure for all the synthesized nanoparticles, and no phase of impurity was noted. The SEM analysis confirmed the rod like structure with crystallites of hexagonal and spherical morphology for pure zinc oxide and nanoflower-like shape for all the manganese-doped nanoparticles and polymer nanocomposites. A very clear polymer cross-linkage chain formation for polymer nanocomposites was also observed. The ultraviolet-visible spectra results showed a red shift in absorption for ZnO-PPA, Mn/ZnO-PPA nanocomposites with reference to pure zinc oxide nanoparticles. The bandgap values are noted to be 3.20, 2.29, 2.89, 2.00 and 2.98 eV for pure ZnO, Mn/ZnO, PPA, ZnO-PPA and Mn/ZnO-PPA, respectively. The existence of elements such as Zn, O, Mn, C and N were evidenced by EDAX analysis. It also confirms the absence of impurities in the synthesized nanoparticles and PPA. Thermal studies showed a finite difference in the weight loss in the temperature range 25 ℃ to 900 ℃. Three-different stages of thermal decomposition were observed in all the above synthesized nanomaterials.
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