ABSTRACT
Zinc oxide nanoparticles (ZnO NPs) were synthesized by the green synthesis methods using
aqueous extracts of Couroupita guianensis Aubl. This is an eco-friendly, time conservative and cost
effective way of nanoparticle production. The aqueous extracts of leaves, stem, flower petals and bark
were used to synthesize the nanoparticles. Zinc Nitrate hexahydrate (Zn(NO3)2·6H2O) was used as a
precursor material. The prepared Zinc oxide nanoparticles were characterized using UV-Vis
spectrophotometric analysis. The wavelength specific UV-Vis absorption peaks for Zinc oxide
nanoparticles were recorded between 290 nm to 302 nm which confirmed the presence of Zinc oxide
in nano scale. The reaction mixture with aqueous extract of leaf showed maximum absorbance spectral
peak at 302 nm, stem at 294 nm, flower petals at 292 nm and bark at 288 nm. This is the first report to
explore the use of Couroupita guianensis for the biogenic production of Zinc oxide nanoparticles to
meet the demand of the pharmaceutical, medicinal and environmental industries.
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