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Issue 16, 2011
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α-Fe2O3 hierarchically hollow microspheres self-assembled with nanosheets: surfactant-free solvothermal synthesis, magnetic and photocatalytic properties

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Abstract

A surfactant-free solvothermal combined with precursor thermal transformation method has been developed for the preparation of α-Fe2O3 hierarchically hollow microspheres assembled with nanosheets. First, a solvothermal treatment is employed to prepare the precursor consisting of hierarchically hollow microspheres assembled with nanosheets using Fe(NO3)3 as the only inorganic reactant without any other additive in mixed solvents of dimethylformamide and ethylene glycol, and α-Fe2O3 hierarchically hollow microspheres assembled with nanosheets are subsequently obtained by thermal treatment of the precursor powder in air at 450 °C for 2 h. The morphology of the precursor can be well preserved during thermal transformation from the precursor to α-Fe2O3 hierarchically hollow microspheres. The samples are characterized by X-ray powder diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM), nitrogen absorption-desorption isotherm, and thermogravimetric (TG) analysis. The effect of the solvent on the morphology of precursors as well as the formation process of the hierarchically hollow microspheres are investigated. The magnetic properties and photocatalytic activity of α-Fe2O3 hierarchically hollow microspheres assembled with nanosheets are discussed.

Graphical abstract: α-Fe2O3 hierarchically hollow microspheres self-assembled with nanosheets: surfactant-free solvothermal synthesis, magnetic and photocatalytic properties

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Publication details

The article was received on 25 Feb 2011, accepted on 16 May 2011 and first published on 24 Jun 2011


Article type: Paper
DOI: 10.1039/C1CE05252G
Citation: CrystEngComm, 2011,13, 5162-5169
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    α-Fe2O3 hierarchically hollow microspheres self-assembled with nanosheets: surfactant-free solvothermal synthesis, magnetic and photocatalytic properties

    J. Xu and Y. Zhu, CrystEngComm, 2011, 13, 5162
    DOI: 10.1039/C1CE05252G

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