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Highly dispersible Fe 3 O 4 ‐Ag @ OPO ( OH ) 2 nanocomposites as a novel eco‐friendly magnetic retrievable catalyst for the reduction of p ‐nitrophenol
Author(s) -
Hojjati Mahsa,
Soleimani Esmaiel
Publication year - 2021
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.202000093
Subject(s) - crystallite , chemistry , magnetite , nanocomposite , catalysis , infrared spectroscopy , nuclear chemistry , fourier transform infrared spectroscopy , absorption (acoustics) , silver nanoparticle , nanoparticle , analytical chemistry (journal) , chemical engineering , nanotechnology , crystallography , materials science , organic chemistry , metallurgy , engineering , composite material
In this study, Fe 3 O 4 ‐Ag@OPO(OH) 2 nanocomposites (NCs) were synthesized using Camellia sinensis leaf extract. This herbal extract was utilized to reduce silver(I) ions to silver nanoparticles (NPs) on the surface of magnetite. The solution color changes from bright to dark, along with the new absorption band at λ max 410 nm confirms the deposition of nanosilver on the magnetite surface. The X‐ray powder diffraction (XRD) analysis was used to characterize the diffraction patterns of silver and magnetite phases and to calculate the average size of the crystallites being 21 nm. The fourier transform infrared (FT‐IR) spectra of green prepared of Fe 3 O 4 ‐Ag@OPO(OH) 2 NCs illustrated the functional group peaks of flavonoids and other phenolic compounds. The energy dispersive X‐ray (EDS) spectra of Fe 3 O 4 ‐Ag@OPO(OH) 2 NCs proved the presence of localized elements, which are incorporated into prepared NCs containing Ag, Fe, O, and P. The vibrating‐sample magnetometer (VSM) analysis indicated that the magnetic nature of Fe 3 O 4 ‐Ag@OPO(OH) 2 NCs is less than Fe 3 O 4 NPs, which is attributed to nonmagnetic nature of Ag NPs and covering the magnetite surface by layers of silver and phosphate. The eco‐friendly synthesized Fe 3 O 4 ‐Ag@OPO(OH) 2 NCs exhibited high catalytic activity toward reducing p ‐nitrophenol.