Abstract:
Zinc oxide (ZnO) is a metal oxide semiconductor that has wide applications in various fields and can
be produced in various forms of microstructure. The manufacture of ZnO using the green synthesis
method was chosen as an alternative step to replace chemical and physical methods, using natural
ingredients derived from plant extracts. In this study, ZnO was synthesized using pineapple peel
extract (Ananas comosus) by varying the growth temperature, namely 40˚C and 80˚C. Sample
characterizations were carried out such as UV-Vis spectroscopy, and FTIR (Fourier Transform
Infrared) to determine the level of absorbance, and functional groups of ZnO samples. Based on the
results of the UV-Vis spectrum, the absorbance peak of the ZnO sample is in the range of 300-361 nm
with band gap energy 3.25 eV and 3.24 eV. The FTIR spectrum shows the functional groups present
in the sample, such as C=C, C=O and O-H derived from polyphenol compounds in the synthesis
process and Zn-O contained in the wave number 483 cm-1.
