Natkanin Supamathanon and Sudarat Sombatsri

DOI: 10.14456/sjst-psu.2020.4

pp. 21 - 26

Abstract

In the present study, iron nanoparticles (Fe-NPs) were synthesized using extracts of green tea leaves as reducing and
capping agents under atmospheric conditions. The Fe-NPs were characterized using scanning electron microscopy, energydispersive spectrometry, transmission electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy. The
nanoparticles were mostly spherical and uniform in size with diameters that ranged from 50 to 70 nm and then used as a Fentonlike catalyst for the decolorization of direct scarlet 4BS in solution. About 85% of the dye was successfully removed in 30 min
using 1 g/L of catalyst in the presence of 15 mM of H₂O₂ at low (acidic) pH values of 2−4 at room temperature.