Ultrasonic treatment of CoFe2O4@B2O3-SiO2 as a new hybrid magnetic composite nanostructure and catalytic application in the synthesis of dihydroquinazolinones

Abstract

New hybrid magnetic composite nanostructure are prepared via ultrasonic treatment by glass-ceramic method, characterized by field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), energy-dispersive X-ray (EDX), element distribution image (EDX mapping), thermal gravimetric analysis (TGA)/differential thermal analysis (DTA) and N adsorption-desorption by Brunauer-Emmett-Teller (BET) analyses. Then, the catalytic activity of the prepared CoFeO@BO-SiO nanoparticles was tested in the synthesis of 2-substituted-3-(phenylamino)-dihydroquinazolin-4(1H)-ones in deep eutectic solvent (DES) based on choline chloride as an eco-friendly and recyclable media. This novel protocol offers several advantages such as high yields (70-93%), short reaction times (10-20min), environmentally-friendly reaction media, easily isolation of the products, simple preparation and recoverability of the nanocatalysts (at least 5 times), recyclability of the solvents from the reaction mixture without use of hazardous volatile organic solvent. The catalyst was readily recycled by the use of an external magnetic field and could be reused several times without significant loss of activity or mass. The saturation magnetization of CoFeO@BO-SiO nanoparticles was 8.97emug. Their average size distribution was about 12.5nm. DES was a mixture of choline chloride and urea that was recovered from the filtrate by evaporating the water under vacuum.

Preparation of Fe3O4/SiO2/TiO2/CeVO4 Nanocomposites: Investigation of Photocatalytic Effects on Organic Pollutants, Bacterial Environments, and New Potential Therapeutic Candidate Against Cancer Cells

“…Despite the good characteristics of the photocatalyst in water treatment, the lack of appropriate recovery of TiO 2 nanocomposites from treated water is a major problem when it comes to applying extensively. To overcome the problem of recovering catalytic nanoparticles from water, magnetic catalysts have been focused (Maleki and Kamalzare, 2014;Maleki et al, 2015;Maleki et al, 2016a;Maleki et al, 2016b;Maleki et al, 2017;Maleki et al, 2019b;Maleki et al, 2019c;Maleki et al, 2019a;Maleki et al, 2019d). After the water treatment process, the magnetic separation of Fe 3 O 4 /TiO 2 by using an external electromagnetic field recycles magnetic composites.…”

Synthesis and crystal structure of a new copper (II) complex, designed to produce efficient successor of Cu2O, toward synergy of adsorption and photodegradation of MB

“…They concluded that the particle size and morphology of nanostructure complex depended on temperature, power ultrasound and reaction time. Magnetic composites nanostructure is particularly attractive owing to their potential applications in catalysis due to their high catalytic performance as well as their easy separation and recycling 22–31 . Among various techniques for the synthesis of transition metal oxide nanoparticles such as impregnation, 32 co‐precipitation, 33 microwave heating, 34 and etc., thermal decomposition of inorganic complexes is one of the most common methods.…”

Sodium gluconate: An efficient organocatalyst for the synthesis of dihydropyrano[2,3-c] pyrazole derivatives

“…The increased attention on the use of novel catalyst and newer techniques via one pot multi component reactions led to the integration of a variety of novelty in their line of investigation [4][5][6][7]. The developments of newer catalyst which are in accordance with the principle of green chemistry are mostly used in one pot synthesis of heterocyclic compounds [8][9]. The direct use of commercially available biomolecules as a catalyst makes the processes simple and efficient and gains the significance over the conventional catalytic system, since their biocompatibility and known inclusive data about non-toxic nature allow them to enter into the category of catalyst and accepted as an environmentally suitable methodology.…”