Green synthesis and characterization of NiFe₂O₄@ZnMn₂O₄ magnetic nanocomposites: An efficient and reusable spinel nanocatalyst for the synthesis of tetrahydropyrimidine and polyhydroquinoline derivatives under microwave irradiation

Abstract

In this study, for the first time, NiFe2O4@ZnMn2O4 magnetic nanocomposites (MNCs) were synthesized using a simple green sol–gel method. The synthesized nanocomposites comprehensive characterized using various analytical techniques including X‐ray Photoelectron Spectroscopy, powder X‐ray diffraction (XRD), transmission electron microscope, field emission scanning electron microscopy, energy dispersive X‐ray analysis, vibrating sample magnetometer, Brunauer Emmett Teller, and elemental mapping. XRD confirmed the spinel crystal structure of NiFe2O4@ZnMn2O4 MNCs. ZnMn2O4 has tetragonal spinel structure while NiFe2O4 cubic. In microwave‐assisted tetrahydropyrimidine and polyhydroquinoline derivative production, NiFe2O4@ZnMn2O4 MNCs showed good catalytic activity. An external magnet can remove catalyst from reactions, and their efficacy stays stable after four cycles.

Degradation of organic Pollutant by Using of BiVO4–NiFe2O4 Heterostructure Photocatalyst under Visible Light Irradiation: Assessment of Detoxicity Study Using Cirrhinus mrigala

“…However, as might be seen from the green-colored XRD pattern of the BVO-NFO composite material, diffraction peaks from both the BVO and NFO phases are exhibited. The crystallite size of the synthesized nanoparticle (BVO-NFO) was 23.06 nm, calculated by using Scherrer eq . , D = 0.9 λ β cos nobreak0em.25em⁡ θ Where D is the average crystallite size, λ is the wavelength of the X-ray, β is the full width half maxima, θ is the Braggs diffraction angle.…”

“…The crystallite size of the synthesized nanoparticle (BVO-NFO) was 23.06 nm, calculated by using Scherrer eq 27. 57,58…”

Structural and Magnetic Properties of Y0.85La0.15Fe1−(4/3)xTixO3 (where (x = 0, 0.025, 0.05 and 0.075) Nanomaterials Derived from Sol-Gel Route

“…Upon increasing the Ti doping t value increased from 0.814 to 0.842, but the perovskite structure of the sample was still maintained. Moreover the crystallite size is also calculated using the full width half maximum of XRD [(200), (121) and (002)] data with help of Scherrer formula, 28,29 and thus calculated values are mentioned in Table I. The calculated values were found to be increased with increase of Ti content in Fe site.…”

Eco-friendly innovation: harnessing nature’s blueprint for enhanced photocatalysis and antimicrobial potential in multi-structured PN/ZnO nanoparticles

“…ZnO NPs find applications in chemical sensors, gas sensors, bio-sensors, electromagnetically coupled sensors, optical and electrical devices, solar cells, and photocatalytic processes [1][2][3]. Recent studies have focused on green synthesis methods, employing plant-based phytochemicals as reducing and stabilizing agents [4,5]. This eco-friendly approach has gained traction for various nanomaterials [6], including gold, silver, platinum, zinc, copper, quantum dots, selenium, titanium, palladium, and zirconium, offering advantages such as easy availability, low toxicity, high productivity, ⩾99.9%), were procured from Sigma-Aldrich, Germany.…”