CD Skripsi
Analisis Sifat Fisis Nanopartikel Zno Yang Disintesis Menggunakan Ekstrak Kulit Nanas (Ananas Comosus)
The biosynthesis of metal nanoparticles using plants, enzymes, and
microorganisms has been recognized as an environmentally friendly procedure as
an alternative to physical and chemical methods. In this research, ZnO
nanoparticles was synthesized using Zn(NO3)2 and pineapple peel extract
(ananascomosus) as precursor and bioreductor, respectively. The synthesis
process was carried out by mixing 0.05 M Zn(NO3)2 and pineapple peel extract
(10g/l) with a ratio of 1:4, 1:1 and 4:1 and pH of 12. The structure, morphology
and optical properties of the ZnO nanoparticles were characterized using X-Ray
Diffractometer (XRD), Scanning Electron Microscopy (SEM), Ultraviolet-Visible
(UV-Vis) Spectroscopy and Fourier Transform Infra-Red (FTIR). The diffraction
pattern of the XRD exhibits seven diffraction peaks that correspond to the hkl of
ZnO hexagonal wurtzite structure. SEM images shows that the morphology of
ZnO sample are mixed spherical and flower-like shape. The sizes of the
nanoparticles obtained are mostly are exceeded 100 nm and show the evidence of
agglomeration. The UV-Vis absorbance spectras of the samples show strong
absorption peaks that occur over a range of wavelengths of 300-380 nm for all
samples. The gap energies of the samples reduce as the zinc nitrate volume
increase from 3.31 eV to 3.09 eV. The FTIR spectra displays absorbance peaks
that represent the involvement of C=C, C=O and O-H functional groups derived
from polyphenol compounds in the synthesis process. As the conclusions, band
gap energy, particle size and morphology of ZnO particles are strongly dependent
on the ratio of ZnO precursor to concentartion.
Key words: ZnO nanoparticles, pineapple peel extract, UV-Vis, XRD, FTIR,
SEM
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