Issue 40, 2011

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

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

Supplementary files

Article information

Article type
Paper
Submitted
28 Feb 2011
Accepted
09 Aug 2011
First published
13 Sep 2011

J. Mater. Chem., 2011,21, 16210-16215

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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