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Green synthesis of silver nanoparticles using Eucalyptus comadulensis leaves extract and its immobilization on magnetic nanocomposite (GO‐Fe 3 O 4 /PAA/Ag) as a recoverable catalyst for degradation of organic dyes in water
Author(s) -
Esmaili Neda,
Mohammadi Pourya,
Abbaszadeh Mehdi,
Sheibani Hassan
Publication year - 2020
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.5547
Subject(s) - methyl orange , thermogravimetric analysis , chemistry , graphene , nuclear chemistry , methylene blue , nanocomposite , catalysis , scanning electron microscope , fourier transform infrared spectroscopy , aqueous solution , reducing agent , transmission electron microscopy , oxide , energy dispersive x ray spectroscopy , chemical engineering , nanotechnology , organic chemistry , photocatalysis , materials science , composite material , engineering
The magnetically recyclable graphene oxide‐Fe 3 O 4 /polyallylamine (PAA)/Ag nanocatalyst was prepared via a green route using Eucalyptus comadulensis leaves extract as both reducing and stabilizing agent. The catalytic activity of this nanocatalyst was investigated for the reduction reaction of methylene blue and methyl orange in the presence of NaBH 4 in aqueous medium at room temperature. The prepared nanocatalyst was characterized by different methods such as Fourier transformed infrared spectroscopy, X‐ray diffraction, scanning electron microscopy–energy dispersive X–ray spectroscopy, thermogravimetric analysis, vibrating sample magnetometer, transmission electron microscopy, and UV–visible spectroscopy. The results show that graphene oxide/PAA/Ag nanocatalyst has good activity and recyclability, and can be reused several times without major loss of activity in the reduction process. The apparent rate constants of the methyl orange (MO) and methylene blue (MB) were calculated to be 0.077 s −1 (3 mg of catalyst) and 0.15 s −1 (2 mg of catalyst), respectively.