Ultrathin MgO Coating of Superparamagnetic Magnetite Nanoparticles by Combined Coprecipitation and Sol–Gel Synthesis

Matteis, Laura De; Custardoy, Laura; Fernández-Pacheco, Rodrigo; Magén, Cesar; Fuente, Jesús M. de la; Marquina, C.; Ibarra, M. R.

doi:10.1021/cm202306z

Cited by 44 publications

(38 citation statements)

References 36 publications

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“…Up to now, various methods, including template synthesis, 12 hydrothermal method, 11 chemical vapor deposition, 13 precipitation method, 14,15 precursor decomposition, 16 sol-gel technique 17 and so on, 18,19 have been developed for the preparation of different morphologies of MgO. The reported morphologies of MgO are mainly composed of spherical structures, 14 nanowires, nanotubes or nanobelts, 20 nanoflowers, 21 nanosheets, 22 cubes, 23 whiskers, 24 stacks of plates, 25 rectangular parallelepiped structures, 26 columnar structures 27 and coralline.…”

Section: Introductionmentioning

confidence: 99%

Controlled synthesis of mesocrystal magnesium oxide parallelogram and its catalytic performance

et al. 2015

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Mesocrystal magnesium oxide (MgO) parallelogram with lengths of diagonal line in the range of 7-9 μm has been synthesized through a facile precipitation method by using phosphate species as the morphology regulator and MgĲNO 3 ) 2 and Na 2 C 2 O 4 as the inorganic sources. Scanning electronic microscope examination revealed that there is a canyon in the middle of the diagonal line of the as-synthesized products. The canyon resulted from the self-assembly of layer-like structures with a thickness of around 100-150 nm on both sides. To investigate the effect of reaction conditions on the morphologies and components of the resulting products, the types and addition amount of phosphate species and the reaction temperature were studied in detail. The results demonstrated that the introduction of trace amounts of phosphate species in the reaction system played a crucial role in determining the morphologies of the obtained products with variation of reaction temperatures, whereas their components have little been influenced after analyses by Fourier-transform infrared spectroscopy and X-ray diffraction. When assynthesized mesocrystal MgO was employed as a catalyst in the Meerwein-Ponndorf-Verley (MPV) reaction between benzaldehyde and ethanol, it demonstrated superior performance to MgO particles without the presence of phosphate species.

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Section: Introductionmentioning

confidence: 99%

Controlled synthesis of mesocrystal magnesium oxide parallelogram and its catalytic performance

et al. 2015

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“…Abundant techniques have been also developed to prepare nanoparticles of MgO. This nanoparticle has attracted much attention due to its wide band gap [3]. However, most of the techniques need high temperatures and perform under a costly inert atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of MgO Nanoparticles by Solvent Mixed Spray Pyrolysis Technique for Optical Investigation

Nemade

Waghuley

2014

International Journal of Metals

105

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Solvent mixed spray pyrolysis technique has attracted a global interest in the synthesis of nanomaterials since reactions can be run in liquid state without further heating. Magnesium oxide (MgO) is a category of the practical semiconductor metal oxides, which is extensively used as catalyst and optical material. In the present study, MgO nanoparticles were successfully synthesized using a solvent mixed spray pyrolysis. The X-ray diffraction pattern confirmed the formation of MgO phase with an excellent crystalline structure. Debye-Scherrer equation is used for the determination of particle size, which was found to be 9.2 nm. Tunneling electron microscope analysis indicated that the as-synthesized particles are nanoparticles with an average particle size of 9 nm. Meanwhile, the ultraviolet-visible spectroscopy of the resulting product was evaluated to study its optical property via measurement of the band gap energy value.

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“…15h Recently, Marquina and co-workers reported the preparation and characterization of Fe 3 O 4 NPs supported on magnesium oxide (MgO) using the solgel method. 16 As part of our efforts to explore the utility of solid phase reactions for the synthesis of organophosphorus compounds, 17 Treatment of 1a with a mixture of diethylphosphite and CCl 4 (2 equiv.) at room temperature in the absence of base gave the corresponding phosphoroamidate 4a in 15% yield after 8 h (Entry 1).…”

Section: Scheme 1: Structures Of Amides and Phosphoroamidatesmentioning

confidence: 99%

“…Benzylamine and cyclohexyl amine also reacted to give compounds 4l and 4m in 70% and 85% yield respectively. The Atherton-Todd reaction of amines with a mixture diisopropyl phosphite and CCl 4 was also studied (entries [14][15][16]. The reaction of aromatic and aliphatic amines with a mixture of diisopropyl phosphite and CCl 4 at ambient temperature, gave the desired products 4n-4p in moderate yields.…”

Section: Scheme 1: Structures Of Amides and Phosphoroamidatesmentioning

confidence: 99%

Fe3O4@MgO nanoparticles as an efficient recyclable catalyst for the synthesis of phosphoroamidates via the Atherton–Todd reaction

Kaboudin

Kazemi

Habibi

2015

Tetrahedron Letters

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Ultrathin MgO Coating of Superparamagnetic Magnetite Nanoparticles by Combined Coprecipitation and Sol–Gel Synthesis

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Cited by 44 publications

References 36 publications

Controlled synthesis of mesocrystal magnesium oxide parallelogram and its catalytic performance

Controlled synthesis of mesocrystal magnesium oxide parallelogram and its catalytic performance

Synthesis of MgO Nanoparticles by Solvent Mixed Spray Pyrolysis Technique for Optical Investigation

Fe3O4@MgO nanoparticles as an efficient recyclable catalyst for the synthesis of phosphoroamidates via the Atherton–Todd reaction

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