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Issue 23, 2012
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Porous platelike hematite mesocrystals: synthesis, catalytic and gas-sensing applications

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Abstract

Porous platelike α-Fe2O3 mesocrystals, composed of single crystalline nanoparticles, were prepared via a controlled solvent evaporation process in the presence of an ionic liquid [Bmim]Cl, which acted as both the solvent and the templating reagent. Compared to the Au/α-Fe2O3 (Fluka) catalyst, a significantly enhanced CO oxidation activity on the Au/porous platelike α-Fe2O3 mesocrystal catalyst was observed, which may be attributed to its more highly exposed (110) facet in the porous platelike α-Fe2O3 mesocrystals. Moreover, good repeatability and fast response and recovery times were obtained in an acetone sensitivity test conducted on the α-Fe2O3 nanoplates, produced via annealing of the porous platelike α-Fe2O3 mesocrystals at 400 °C. It is expected that this method is applicable to the synthesis of other inorganic functional oxides with unique structures and properties.

Graphical abstract: Porous platelike hematite mesocrystals: synthesis, catalytic and gas-sensing applications

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Publication details

The article was received on 12 Jan 2012, accepted on 04 Apr 2012 and first published on 10 Apr 2012


Article type: Paper
DOI: 10.1039/C2JM30216K
Citation: J. Mater. Chem., 2012,22, 11694-11700
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    Porous platelike hematite mesocrystals: synthesis, catalytic and gas-sensing applications

    J. Ma, J. Teo, L. Mei, Z. Zhong, Q. Li, T. Wang, X. Duan, J. Lian and W. Zheng, J. Mater. Chem., 2012, 22, 11694
    DOI: 10.1039/C2JM30216K

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