Magnetic and catalytic properties of cubic copper ferrite nanopowders synthesized from secondary resources

Rashad, M.M.; Mohamed, Reda M.; Ibrahim, M. A.; Ismail, L.F.M.; Abdel-Aal, E.A.

doi:10.1016/j.apt.2011.04.005

Cited by 179 publications

(46 citation statements)

References 35 publications

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“…The acquirement of the desired physical and chemical properties from metal oxide NPs requires an effective preparation method and has become a significant subject of research. There are several nonconventional techniques in order to achieve high quality metal oxide nanoparticles that have been used or are under development for preparing ultrafine nanostructures [7][8][9][10][11][12][13][14][15][16][17][18]. Numerous factors and various precipitation agents were utilized to synthesis magnetic metal oxide nanocrystals with specific structures.…”

Section: Introductionmentioning

confidence: 99%

Structure and Physical Properties of NiO/Co3O4 Nanoparticles

Naseri

Dehzangi²,

Kamari

et al. 2016

Metals

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Abstract:The thermal treatment method was employed to prepare nickel-cobalt oxide (NiO/Co 3 O 4 ) nanoparticles. This method was attempted to achieve the higher homogeneity of the final product. Specimens of nickel-cobalt oxide were characterized by various experimental techniques, including X-ray diffraction (XRD), transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR). X-ray diffraction results showed that there was no crystallinity in the predecessor, and it still had the amorphous phase. The formations of the crystalline phases of the nickel-cobalt oxide nanoparticles started from 350-500˝C, and the final products had different crystallite sizes ranging from 11-35 nm. Furthermore, the variation of DC conductivity (σ dc ), impedance, tangent loss (tgδ) and dielectric constant (ε 1 ) of the calcined specimens with frequency in the range of 10 2 -10 6 Hz was investigated. σ dc showed a value of 1.9ˆ10´6 S/m, 1.3ˆ10´6 S/m and 1.6ˆ10´6 S/m for the specimens calcined at 350, 400 and 450˝C, respectively. Additionally, a decrease in tgδ values with an increase in temperature was observed. Finally, the formed nanoparticles exhibited ferromagnetic behaviors, which were confirmed by using a vibrating sample magnetometer (VSM).

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Section: Introductionmentioning

confidence: 99%

Structure and Physical Properties of NiO/Co3O4 Nanoparticles

Naseri

Dehzangi²,

Kamari

et al. 2016

Metals

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“…Figure 3a shows the XPS spectrum in a wide energy range up to 1200 eV and Cu 3 s/Fe 3 s/Cu 3 p/Fe 3 p and O 2 s core level regions are indicated in the figure by (#) and (+), respectively [26]. The Cu 2p line shows three pairs of lines at 935.38, 955.33 and 975.06 eV (Fig.…”

Section: Xps Analysismentioning

confidence: 99%

Green and chemical-engineered CuFe2O4: characterization, cyclic voltammetry, photocatalytic and photoluminescent investigation for multifunctional applications

Surendra¹,

Veerabhdraswamy

Anantharaju

et al. 2018

J Nanostruct Chem

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CuFe 2 O 4 nanoparticles (CNPs) with cubic and tetragonal spinel structures were synthesized by Jatropha oil-assisted green combustion route (GCR) and urea-assisted chemical combustion route (CCR) and well-characterized. The photocatalytic activity of CNPs prepared via GCR and CCR showed 96 and 83% sunlight degradation of Malachite green (MG) dye, respectively. Electrochemical properties of CNPs were studied by means of Cyclic Voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The current research work pledges to provide some novel insights into the design of material for multifunctional long-term applications for environmental clean-up.

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“…10 inset) [42]. VSM results of saturation magnetization (M s ), remanant magnetization (M r ) and coercivity (H c ) values are reported in Table 2 [14]. From the results, it is clearly understood that the magnetic properties of the samples depended on size, morphology and also preparation methods.…”

Section: Vibrating Sample Measurements (Vsm)mentioning

confidence: 89%

“…Several techniques have been used to prepare the ferrite nano-and microstructures, such as co-precipitation, solgel, hydrothermal, solvothermal, polyol route and thermal decomposition methods, etc. [9][10][11][12][13][14][15]. However, the above methods encounter some disadvantages such as long time and high-energy consuming, complicated equipment and complex procedures, and also required high temperature for calcinations to complete the crystallization of the final products [16].…”

Section: Introductionmentioning

confidence: 98%

Hibiscus rosa-sinensis Leaf Extracted Green Methods, Magneto-Optical and Catalytic Properties of Spinel CuFe2O4 Nano- and Microstructures

Manikandan

Durka²,

Antony

2015

J Inorg Organomet Polym

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Spinel CuFe 2 O 4 nano-and microstructures were synthesized by a simple, economical and eco-friendly microwave heating (MHM) and modified sol-gel methods (SGM) using metal nitrates and Hibiscus rosa-sinensis leaf extracted solution, instead of toxic inorganic/organic catalyst, template and surfactant. Powder XRD, FT-IR, EDX and SAED results were confirmed that the as-synthesized products have a single-phase spinel structure with high crystallinity and without the presence of any other secondary phase impurities. The morphology of the samples was revealed by HR-SEM and HR-TEM techniques show that the MHM and SGM products consist of nano-and microstructures, respectively, and their possible formation mechanisms were also proposed. The optical band gap (E g ) was measured using Kubelka-Munk model and it shows higher value (2.35 eV) for CuFe 2 O 4 -MHM than CuFe 2 O 4 -SGM (2.18 eV), due to the smaller particle size of CuFe 2 O 4 -MHM. The magnetic property of the samples showed a ferromagnetic behavior and the magnetization (M s ) value of CuFe 2 O 4 -MHM is higher i.e. 61.13 emu/g than CuFe 2 O 4 -SGM (57.25 emu/g). Both the samples were successfully tested as catalysts for the conversion of benzylic alcohols to respective carbonyls using H 2 O 2 (as oxidant) and acetonitrile (as a solvent) catalytic system. It was found that the CuFe 2 O 4 -MHM catalyst show best performance of conversion of aromatic alcohols into aldehydes than that of CuFe 2 O 4 -SGM. Spinel CuFe 2 O 4 catalyst is magnetically recyclable and could be reused with no significant loss in catalytic activity as proved for five consecutive cycles.

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Magnetic and catalytic properties of cubic copper ferrite nanopowders synthesized from secondary resources

Cited by 179 publications

References 35 publications

Structure and Physical Properties of NiO/Co3O4 Nanoparticles

Structure and Physical Properties of NiO/Co3O4 Nanoparticles

Green and chemical-engineered CuFe2O4: characterization, cyclic voltammetry, photocatalytic and photoluminescent investigation for multifunctional applications

Hibiscus rosa-sinensis Leaf Extracted Green Methods, Magneto-Optical and Catalytic Properties of Spinel CuFe2O4 Nano- and Microstructures

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