CuFe2O4 magnetic heterogeneous nanocatalyst: Low power sonochemical-coprecipitation preparation and applications in synthesis of 4H-chromene-3-carbonitrile scaffolds

Abstract

The paper presents the synthesis and catalytic activity of CuFe2O4 nanoparticles. The CuFe2O4 nanoparticles have been prepared by sonochemical route under low power ultrasonic irradiation (UI) and using silent stirring at room temperature only (ST) along with co-precipitation method, without using any additive/capping agent. The synthesized magnetic nanoparticles were successfully used and compared for the synthesis of 4H-chromene-3-carbonitrile derivatives. The CuFe2O4 nanoparticles obtained by sonochemical route exhibit higher catalytic activity because of small size (0.5-5 nm), high surface area (214.55 m(2)/g), high thermal stability up to 700°C, recyclability and reusability due to its magnetic characteristics than CuFe2O4 nanoparticles obtained by room temperature silent stirring. The synthesized CuFe2O4 nanoparticles were characterized by FT-IR, SEM-EDX, HR-TEM, XRD, TGA/DTA/DTG, BET, VSM techniques. The present method is of great interest due to its salient features such as environmentally compatible, efficient, short reaction time, chemoselectivity, high yield, cheap, moisture insensitive, green and recyclable catalyst which make it sustainable protocol.

Synergistically enhanced solar light‐driven degradation of hazardous food colorants by ultrasonically derived MgFe2O4/S‐doped g‐C3N4 nanocomposite: A Z‐scheme system‐based heterojunction approach

“…In the next step, the obtained mixture was then placed for ultrasonication for 10 min on probe sonicator running at a power of 500 W. As a consequence of the high-energy ultrasonic irradiations, the phenomena of acoustic cavitation (relating to the formation, uniform growth and violent collapse of bubbles) arouse inside the liquid. [79,80] After the complete dispersion, the addition of ascorbic acid (3 mmol) was done to the resulting solution under gradual stirring and the mixture was kept on magnetic stirrer for further 30 min to form a clear and homogeneous dispersion. The obtained solution was the heated on a hot plate at 150 C for the complete evaporation of water.…”

Low‐temperature assembling of naturally driven copper ferrite starch nanocomposites hydrogel with magnetic and antibacterial activities

“…synthesized CuFe 2 O 4 nanoparticles by coprecipitation method at room temperature with copper and iron salt, deionized water and KOH solution. High surface area, small particle size (0.5–5 nm) and good catalytic activities were obtained …”

“…The nanoparticles can be simply mixed with the hydrogel raw material or synthesized during the processing entrapped within the swelled hydrogel in an aqueous media or synthesized between the free‐space of networks in the swollen gel . Mixing metal nanoparticles with hydrogels leads to the special properties for various biomedical applications …”

Amelioration of H4[W12SiO40] by nanomagnetic heterogenization: For the synthesis of 1H–pyrazolo[1,2‐b]phthalazinedione derivatives

“…In conjunction with our studies of functionalized magnetite nanoparticles and also their efficient use as a magnetically separable catalyst, a study of acidic functionalized magnetite nanoparticles has been initiated. Silicotungstic acid (STA, H 4 [W 12 SiO 40 ]) has been coated over amine‐functionalized magnetite nanoparticles for the first time, which has increased its activity as compared to pure H 4 [W 12 SiO 40 ], and the catalytic scope in the synthesis of pyrazolo[1,2‐ b ]phthalazinediones has been examined.…”