Spinel zinc ferrite nanoparticles: an active nanocatalyst for microwave irradiated solvent free synthesis of chalcones

Abstract

A profoundly effective magnetically recoverable nano zinc ferrite nanocatalyst was fabricated by means of sol-gel auto ignition strategy. The synthesized nanocatalyst has been completely portrayed by standard techniques for structural, morphological, compositional, surface, magnetic, dielectric, optical and photoluminescence properties individually. The x-ray diffraction pattern affirmed the arrangement of cubic spinel structure with an average crystallite size of 21 nm. FE-SEM images uncovered the circular morphology with nanometric average grain measure (37 nm). The surface area, pore volume and pore radius was observed to be 39.812 m 2 g −1 , 3.41 cc g −1 and 1.34 nm individually from BET analysis. VSM investigation demonstrated the superparamgnetic nature of the prepared sample with moderate magnetization value and negligible coercivity. The optical band gap deduced from UV-vis spectra was observed to be 2.098 eV. Every one of these properties of zinc nanoferrite makes them brilliant contender for microwave radiation absorption. Further, a proficient and versatile microwave irradiated solvent free synthesis of chalcone derivatives has been developed using prepared zinc nanoferrite catalyst. The remarkable highlights of this new protocol are solvent free reaction, economical cheapness, eco-friendliness, high yields, reduced reaction times and easy recovery and reuse of zinc ferrite nanocatalyst.

Effect of reaction condition on microstructure and properties of (NiCuZn)Fe2O4 nanoparticles synthesized via co-precipitation with ultrasonic irradiation

“…Fig.3 is the infrared spectrum of the sample synthesized with different input powers at 50℃. Each sample has an obvious absorption peak in 581-584cm -1 , which is related to the vibration of octahedral metal ion oxygen complex [33] , [46] . All samples presented FTIR stretching bands at about 410 cm -1 (also due to Me-O stretching) [47] .…”

Zinc substitution effect on the structural, spectroscopic and electrical properties of nanocrystalline MnFe2O4 spinel ferrite

“…In the field of nanomagnetism, the spinel ferrites are important materials because they exhibit unusual magnetic and electrical properties in comparison with their bulk counterpart [ 4 , [10] , [11] , [12] ]. Nanocrystalline spinel ferrites have been demonstrated as useful material for hyperthermia [ 13 , 14 ], detection of COVID-19 [ 15 ], visible light-enabled photodegradation [ 16 ] and, the catalyst for the synthesis of chalcones [ 17 ]. The molecular formula of spinel-type ferrite is MFe 2 O 4 (M = Co, Ni, Mn, Mg, or other divalent cations) [ 18 ].…”

Physicochemical properties of ambient pressure dried surface modified silica aerogels: effect of pH variation

“…For the prepared silica aerogel samples the physisorption isotherms were found that of type IV [32]. According to IUPAC classification, hysteresis loops, mesoporous materials consistent with type IV hysteresis loops [34][35][36]. The obtained isotherms plots of silica aerogel with different pH values indicate mesoporous (2-50 nm) size.…”