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Issue 17, 2012
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Sacrificial template-directed synthesis of mesoporous manganese oxide architectures with superior performance for organic dye adsorption

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Abstract

Mesoporous MgO architectures were successfully synthesized by the direct thermal transformation of the sacrificial oxalate template. The as-prepared mesoporous architectures were characterized by X-ray diffraction (XRD), scanning electronic microscopy (SEM), transmission electron microscopy (TEM), X-ray energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), and nitrogen adsorption–desorption techniques. The MgO architectures showed extraordinary adsorption capacity and rapid adsorption rate for removal of Congo red (CR) from water. The maximum adsorption capacity of the MgO architectures toward CR reached 689.7 mg g−1, much higher than most of the previously reported hierarchical adsorbents. The CR removal process was found to obey the Langmuir adsorption model and its kinetics followed pseudo-second-order rate equation. The superior adsorption performance of the mesoporous MgO architectures could be attributed to the unique mesoporous structure, high specific surface area as well as strong electrostatic interaction.

Graphical abstract: Sacrificial template-directed synthesis of mesoporous manganese oxide architectures with superior performance for organic dye adsorption

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Publication details

The article was received on 29 May 2012, accepted on 02 Jul 2012 and first published on 04 Jul 2012


Article type: Paper
DOI: 10.1039/C2NR31333B
Citation: Nanoscale, 2012,4, 5401-5408
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    Sacrificial template-directed synthesis of mesoporous manganese oxide architectures with superior performance for organic dye adsorption

    L. Ai, H. Yue and J. Jiang, Nanoscale, 2012, 4, 5401
    DOI: 10.1039/C2NR31333B

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