Open AccessGreen synthesis of magnetically recoverable Fe 3 O 4 /HZSM‐5 and its Ag nanocomposite using Juglans regia L. leaf extract and their evaluation as catalysts for reduction of organic pollutants
Author(s) -
RostamiVartooni Akbar,
MoradiSaadatmand Abolfazl
Publication year - 2019
Publication title -
iet nanobiotechnology
Language(s) - English
Resource type - Journals
ISSN - 1751-875X
DOI - 10.1049/iet-nbt.2018.5089
Subject(s) - nanocomposite , catalysis , materials science , nuclear chemistry , fourier transform infrared spectroscopy , scanning electron microscope , aqua regia , methyl orange , aqueous solution , nanoparticle , selective catalytic reduction , field emission microscopy , 4 nitrophenol , chemical engineering , nanotechnology , chemistry , diffraction , organic chemistry , composite material , metal , metallurgy , physics , optics , photocatalysis , engineering
In this work, an Fe 3 O 4 /HZSM‐5 nanocomposite was synthesised in the presence of Juglans regia L. leaf extract. Then, silver nanoparticles (Ag NPs) were immobilised on the surface of prepared magnetically recoverable HZSM‐5 using selected extract for reduction of Ag + ions to Ag NPs and their stabilisation on the surface of the nanocomposite. The reduction of Ag + ions occurs at room temperature within a few minutes. Characterisation of the prepared catalysts has been carried out using fourier transform infrared (FT‐IR), X‐ray diffraction, field‐emission scanning electron microscopy (FESEM), energy‐dispersive spectroscopy, Brunauer–Emmett–Teller method, and a vibrating sample magnetometer. According to the FESEM images of the nanocomposites, the average size of the Ag NPs on the Fe 3 O 4 /HZSM‐5 surface was >70 nm. The Ag/Fe 3 O 4 /HZSM‐5 nanocomposite was a highly active catalyst for the reduction of methyl orange and 4‐nitrophenol in aqueous medium. The utilisation of recycled catalyst for three times in the reduction process does not decrease its activity.