Magnetic cobalt ferrite nanoparticles as an efficient catalyst for oxidation of alkenes

Kooti, M.; Afshari, Mozhgan

doi:10.1016/j.scient.2012.05.005

Cited by 105 publications

(53 citation statements)

References 37 publications

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“…More large-size CoFe 2 O 4 magnetic nanoparticles (25 nm) were used as a catalyst for the oxidation of various alkenes in the presence of tert-butylhydroperoxide (t-BuOOH) with almost quantitative yields ( Fig. 3) (Kooti, Afshari, 2012). It seemed that this heterogeneously catalysis system proceeds by coordination of t-BuOOH to the metal (Fe 3+ cations) on the surface of the catalyst.…”

Section: Cobalt Ferritesmentioning

confidence: 99%

Mini-review: Ferrite nanoparticles in the catalysis

Kharisov

Dias

Kharissova

2019

Arabian Journal of Chemistry

261

118

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Recent applications of ferrite nanoparticles as catalysts in organic processes are reviewed. Catalytic applications include the use of mainly cobalt, nickel, copper, and zinc ferrites, as well as their mixed-metal combinations with Cr, Cd, Mn and sometimes some lanthanides. Core-shell nanostructures with silica and titania are also used without loss of magnetic properties. The ferrite nanomaterials are obtained mainly by wet-chemical sol-gel or co-precipitation methods, more rarely by sonochemical technique, mechanical high-energy ball milling, spark plasma sintering, microwave heating or hydrothermal route. Catalytic processes with application of ferrite nanoparticles include decomposition (in particular photocatalytic), reactions of dehydrogenation, oxidation, alkylation, C-C coupling, among other processes. Ferrite nano catalysts can be easily recovered from reaction systems and reused up to several runs almost without loss of catalytic activity.

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Section: Cobalt Ferritesmentioning

confidence: 99%

Mini-review: Ferrite nanoparticles in the catalysis

Kharisov

Dias

Kharissova

2019

Arabian Journal of Chemistry

261

118

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“…This has renewed interest to study different properties of pure and mixed spinel ferrite systems in nanocrystalline regime. Transition metal ferrites both doped and undoped are attractive candidates for a wide range of applications including catalysis, [1][2][3][4] and several devices such as antennas, permanent magnets, memory storage devices, microwave devices, telecommunication, computer etc. 5 The polycrystalline ferrites such as Ni-Cu-Zn ferrites have very important structural properties dependent on several factors such as method of preparation, substitution of cations, sintering temperature, sintering time, sintering atmosphere, porosity and microstructure.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Chromium Doped Ni-Cu-Zn Nano Ferrites

Shinde¹,

Dhale

Suryavanshi

et al. 2017

ACSi

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Chromium doped Ni-Cu-Zn nano ferrites with chemical formula Ni 0.2 Cu 0.2 Zn 0.6 Fe 2-x Cr x O 4 (x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0) were prepared by using sol-gel auto combustion method. The prepared precursors of Chromium substituted Ni-CuZn ferrites were sintered at 500 °C for 4h. Compositional stoichiometry were confirmed from EDAX patterns. The XRD data revealed that the all samples possess a single phase cubic spinel structure. The Lattice constant, X-ray density, hopping lengths and crystallite size determined from XRD data decreases with increase in Cr 3+ concentration. The IR spectra show two major absorption bands, high frequency band ν 1 ≈ 600 cm -1 and low frequency band ν 2 ≈ 450 cm -1 attributed to the stretching vibration of tetrahedral and octahedral sites respectively. The surface morphology of the prepared samples was studied by Scanning Electron Microscopy and Transmission Electron Morphology.

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“…On the basis of crystal structure ferrites are grouped into three classes namely garnet, spinel and hexagonal ferrite. The spinel ferrites are widely studied because of their superior properties such as structural, magnetic, electrical and catalytic properties, all of which are different from those of their bulk counterparts and applications point of view in various and new fields like magnetic drug delivery, catalyst, sensors, biological, biomedical and medical science [1][2][3][4]. The spinel ferrite has the general formula of M-Fe2O4 where M is a divalent metal ion (Mn, Co, Ni, and Zn etc).…”

Section: Introductionmentioning

confidence: 99%

Structural and Electrical Properties of Ni-Zn Ferrite Nanoparticles: Influence of Mixed Fuel Approach

V.R¹,

Sarnaik²,

Murumkar³

et al. 2017

International Advanced Research Journal in Science, Engineering

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Ni 0.5 Zn 0.5 Fe 2 O 4 (Ni-Zn) ferrite nanoparticles were synthesized by sol-gel auto combustion method using mixed fuel approach (citric acid and ethylene glycol) as a fuel. The metal nitrate to fuel ratio was taken as 1:(1:3). The as synthesized powder of Ni-Zn ferrite nanoparticles is annealed at 650˚C for 5 h and prepared sample was used for characterization and investigations of structural and electrical properties. The structural characterization of Ni-Zn ferrite nanoparticles were done by X-ray diffraction technique. The average crystallite size obtained by Scherrer's formula is of the order of 21 nm. The lattice constant determined from XRD data is in the reported range 8.3783 Å. The DC electrical resistivity was investigated from room temperature to 850 K using two probe techniques. DC electrical resistivity behaviour of Ni-Zn ferrite nanoparticles suggests that the sample is semiconducting in nature.

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Magnetic cobalt ferrite nanoparticles as an efficient catalyst for oxidation of alkenes

Cited by 105 publications

References 37 publications

Mini-review: Ferrite nanoparticles in the catalysis

Mini-review: Ferrite nanoparticles in the catalysis

Preparation and Characterization of Chromium Doped Ni-Cu-Zn Nano Ferrites

Structural and Electrical Properties of Ni-Zn Ferrite Nanoparticles: Influence of Mixed Fuel Approach

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