New sonochemical magnetite nanoparticles functionalization approach of dithiooxamide–formaldehyde developed cellulose: From easy synthesis to recyclable 4‐nitrophenol reduction

Abstract

Magnetic [FA‐c‐(C‐DTX)@Fe3O4] nanocomposites have been prepared with a four‐step technique involving three mechanical stirring conventional steps to obtain [(FA‐c‐(DTX‐g‐DAC)] and an ultrasound‐assisted Fe3O4 coating approach to fabricate [FA‐c‐(C‐DTX)@Fe3O4]. Magnetic nanoparticles (NPs) (Fe3O4 NPs) synthesis and integration has been easily and rapidly approached under novel environmentally friendly optimized reaction conditions: an ethanol–water solution, one iron precursor use, short reaction time, low temperature, and an ultrasonic irradiation process. This new condition's unique combination is attributed to our new synthesis procedure. Sonochemically synthetisized [FA‐c‐(C‐DTX)@Fe3O4] were easily separated from the reaction mixture simply via external magnetic field application, and therefore, neither filtration nor centrifigation was required. The synthetisized samples have been investigated by Fourier transform infrared (FTIR) spectroscopy, nuclear magnetic resonance (NMR) spectroscopy, X‐ray photoelectron spectroscopy (XPS), X‐ray diffraction (XRD), thermogravimetry analysis (TGA), scanning electron microscopy (SEM), and vibrating‐sample magnetometry (VSM). Obtained outcomes including successful magnetite coating process, good crystallinity, homogenous morphology, enhanced thermal stability, and obvious magnetic properties suggested the potential of sonochemical procedure to fabricate and integrate magnetic NPs. This sonochemically synthesized catalyst was evaluated toward the reduction of the organic pollutant 4‐nitrophenol and showed excellent catalytic activity. This ultrasound‐assisted nanocomposites preparation is simply scalable to meet industrial application.

High incorporation of magnetite nanoparticles inside tetraaza macrocyclic Schiff base cavity: spectroscopic characterization and modeling by DFT calculation

“…Figure13apresents the magnetic hysteresis loop analysis based on the relationship between magnetization (M) versus Magnetic eld (H) that shows a similar shape compared to free Fe 3 O 4 NPs by returning to literature[87, 88]. So the ferromagnetic character of [(C 40 H 28 N 4 )@Fe 3 O 4 NPs] was proved and the magnetite Fe 3 O 4 was successfully incorporated inside the macrocycle due to the signi cant decrease of the saturated magnetization (M s ) from (57.33 emu/g)[47] of magnetite to 35 emu/g suggesting that the tetraaza macrocyclic ligand reduced the magnetic response to an applied magnetic eld. In addition, this decrement can be explained either by the change of structure and/or by the surface anisotropy upon coating [89].…”

“…However, the co-precipitation method usually shows the di culty to control nanoparticle size and distribution size due to the strong dipole-dipole interactions which lead to the formation of Fe 3 O 4 NPs aggregated. So, the deterioration of magnetic proprieties [19,47].…”

A Novel Recyclable Magnetic Nano-Catalyst for Fenton-Photodegradation of Methyl Orange and Imidazole Derivatives Catalytic Synthesis

“…Photo-Fenton experiments were conducted to assess the influence of the key operational parameters. These parameters included the initial quantity (5-35 mg) of the Fe 3 O 4 -based photocatalyst, MO concentration (5 × 10 −4 -35 × 10 −4 M), initial pH 0 (4)(5)(6)(7)(8)(9)(10)(11)(12), and H 2 O 2 concentration (5-10 mmole•L −1 ). In batch trials, the procedure involved stirring with a magnetic stirrer and exposure to UV light or natural visible sunlight while controlling the reaction temperature by circulating water (25-45 • C).…”

“…Inappropriate wastewater treatment incorporating dyes can directly affect regional water quality, thereby threatening environmental and human health [ 1 , 2 , 3 ]. Of all the efficient treatment processes for organic colorants [ 4 , 5 , 6 , 7 , 8 ], the Fenton-type heterogeneous oxidation process involving Fe 3 O 4 nanoparticles represents one of the most advanced and successful treatment technologies and has been extensively investigated for the removal of organic dyes with high efficiency coupled with the non-selective decomposition of organic pollutants [ 9 , 10 , 11 , 12 ]. Nevertheless, neat Fe 3 O 4 nanoparticles exhibit a propensity to decompose in water.…”

A Novel Recyclable Magnetic Nano-catalyst for Fenton-photodegradation of Methyl Orange and Imidazole Derivatives catalytic Synthesis

“…Nevertheless, neat Fe3O4 nanoparticles exhibit a propensity to decompose in water. At the same time, pure Fe3O4 nanoparticles aggregate and corrode readily at acidic pH, restricting their catalytic performance and durability, and reducing their broad application in wastewater treatment [7].…”