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Issue 40, 2011
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Fabrication of γ-MnO2/α-MnO2 hollow core/shell structures and their application to water treatment

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Abstract

In this work, we present a novel concept of structural design for the synthesis of a new type of core/shell structure comprising γ-MnO2 cores inside hollow α-MnO2 shells. The approach involves two main steps. First, MnCO3 microellipsoids were mixed directly with KMnO4 solution, which lead to a manganese oxide shell on the surface of the MnCO3. Then, thermal annealing of this type of core/shell structure resulted in the formation of γ-MnO2/α-MnO2 ellipsoids, accompanying with the phase transition in both the core and shell. The as-prepared γ-MnO2/α-MnO2 ellipsoids were used as adsorbent in water treatment, and showed an excellent ability to remove organic pollutants and heavy metal ions without any other additives.

Graphical abstract: Fabrication of γ-MnO2/α-MnO2 hollow core/shell structures and their application to water treatment

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Publication details

The article was received on 28 Feb 2011, accepted on 09 Aug 2011 and first published on 13 Sep 2011


Article type: Paper
DOI: 10.1039/C1JM10862J
Citation: J. Mater. Chem., 2011,21, 16210-16215
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    Fabrication of γ-MnO2/α-MnO2 hollow core/shell structures and their application to water treatment

    J. Cao, Q. Mao, L. Shi and Y. Qian, J. Mater. Chem., 2011, 21, 16210
    DOI: 10.1039/C1JM10862J

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