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Abstract: In this work, zinc oxide (ZnO) nanoparticles are synthesised and characterised in an environmentally friendly manner, and their potential uses in photocatalytic processes is investigated. The green synthesis of ZnO nanoparticles involved the utilization of zinc nitrate hexahydrate (Zn(NO3)2·6H2O) and Nyctanthes arbor-tristis Plant Extracts. The nanoparticles were synthesized at an optimal temperature of 60 ◦C. The samples were analysed using energy-dispersive X-ray spectroscopy (EDX), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), Dynamic Light Scattering(DLS) and UV-visible spectroscopy to determine their characteristics. ZnO nanoparticles were identified by a distinctive peak at 302 nm in UV-visible spectroscopy. SEM confirmed the nanoscale size and morphology of the ZnO particles. The elemental information obtained from the EDX examination showed that oxygen made up 22.2% of the atomic weight and zinc made up 45.6%. The diffractogram was indexed by XRD analysis at different angles that corresponded to ZnO nanoparticles. DLS determined the average crystalline size, which was 87.5 nm. FTIR examination revealed a distinctive signal at 1051 cm−1, suggesting that the nanoparticles contain functional groups. The produced nanoparticles had strong photocatalytic activity, especially when Methyl Blue was exposed to UV light and began to degrade. Rate constants and correlation coefficients were used to examine how the addition of ZnO nanoparticles affected the photocatalytic degradation process' kinetics. These nanoparticles were synthesised using an economical and ecologically friendly process. This work offers potential directions for further investigation and applications in the fields of nanotechnology, biosensor development, and water remediation.
Kumar et al. (Sun,) studied this question.