Proceedings of International Conference on Applied Innovation in IT
2026/03/31, Volume 14, Issue 1, pp.441-448

Structural and Optical Analysis of Green-Synthesized ZnO Nanoparticles


Firas. H.Ibrahim and Olfat. A. Mahmood


Abstract: Extracts from the leaves of Crocus sativus L. (CS) were used to synthesize zinc oxide (ZnO NPs) nanoparticles. It has been studied on the properties of ZnO NPs nanoparticles using CS tree extracts, utilising several characterization techniques. The selected plant CS demonstrated findings from both FTIR and UV-visible spectroscopies, indicating it as a preferable alternative for the levels of CS ZnO NPs. The UV-visible spectra of CS tree leaf extracts exhibited a distinct absorption peak at 274 nm. Absorption peaks at 345 nm and 375 nm, characteristic of zinc oxide nanoparticles. Field emission scanning electron microscope (FESEM) data analysis of the particles size before and after calcination from 34.32 nm to 61.52 nm respectively showed that the calcination temperatures significantly affected the orientation, shape and dimensions of the ZnO NPs nanoparticles synthesized by the green synthesized. An FT-IR spectroscopy study reveals an absorption peak indicative of Zn–O bonding within the range of 400 to 600 cm⁻¹.The XRD findings indicate that the ZnO NPs nanoparticles possess hexagonal wurtzite crystal structures, and that the principal diffraction peaks (100), (002), and (101) exhibit variations in intensity with differing heating temperatures. The average crystal size of synthesised grains was determined to be 22.7 nm for ZnONPs without calcination and 31.5 nm for ZnONPs subjected to calcination at 450 °C. The results and characteristics indicate that ZnO NPs nanoparticles calcined at 450°C exhibit improved quality compared to those synthesised without thermal treatment. The calcined ZnO NPs nanoparticles exhibited an increase in crystallite size, alongside higher optical purity and a shift in the absorption peak from 345 nm to 375 nm, indicating improved crystallinity.

Keywords: Calcination Temperature, Zno Nps, Leaves of Crocus Sativus L, Tree Extract, Green Synthesis.

DOI: Under indexing

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