The synthesis of metal oxide nanoparticles with the use of plant extracts is a promising
alternative to the conventional chemical method. This study aims to synthesize green zinc oxide
nanoparticles with zinc acetate dihydrate precursor using Citrus reticulata peel powder. The
synthesized nanoparticles were characterized for different analytic techniques. The maximum
UV-Vis absorption peak was observed at 357 nm wavelengths which is specific for zinc oxide
nanoparticles with a greater particle size of 36 nm. The FT-IR result shows a strongest
absorption bands at 651 cm -1 , which resulted from a covalent bond between zinc metal and
oxygen atoms (Zn-O). According to SEM analysis, the morphology of the biosynthesized ZnO
NPs were predominantly spherical in shape. Furthermore, the purity of the ZnO NPs was also
confirmed by EDS analysis. The crystallinity of the biosynthesized ZnO NPs was confirmed by
XRD analysis, revealing sharp and narrow diffraction peaks, confirming the hexagonal wurtzite
structure of the ZnO NPs.