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Issue 14, 2013
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Evolution of space-efficient and facet-specific ZnO 3-D nanostructures and their application in photocatalysis

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Abstract

We report new structural designs to dramatically increase the surface area of the ZnO nanostructure without compromising the small volume much. Space-efficient and facet-specific ZnO 3-D nanostructures, namely {10[1 with combining macron]1}-stacked nanocones and {10[1 with combining macron]0}-nanoforest, have been prepared by facet-selective etching and oriented nanocrystal growth, respectively. Grain boundary etching of multiwalled ZnO hexagonal nanocones leads to polar {10[1 with combining macron]1} facet-maximized ZnO stacked nanocones and oriented nanocolumn growth on ZnO hexagonal nanocones generates {10[1 with combining macron]0} facet maximized ZnO nanoforests. These facet-specific ZnO nanostructures offer opportunities for examination of their facet-dependent photocatalytic properties. Compared to the original ZnO hexagonal nanocone structures, these new ZnO 3-D structures exhibit a much higher photocatalytic property for photodegradation of organic dye, rhodamine B. Specifically, {10[1 with combining macron]1} stacked nanocones with a polar {10[1 with combining macron]1} plane maximized structure and high density of oxygen vacancies have shown the best performance among structures examined. We also demonstrate a great photocatalytic performance of the Au supported 3-D ZnO nanostructures with well-defined facets and high surface area.

Graphical abstract: Evolution of space-efficient and facet-specific ZnO 3-D nanostructures and their application in photocatalysis

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Publication details

The article was received on 25 Sep 2012, accepted on 09 Nov 2012 and first published on 09 Nov 2012


Article type: Paper
DOI: 10.1039/C2CE26557E
Citation: CrystEngComm, 2013,15, 2601-2607
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    Evolution of space-efficient and facet-specific ZnO 3-D nanostructures and their application in photocatalysis

    S. Kim, M. Kim, T. Kim, H. Baik and K. Lee, CrystEngComm, 2013, 15, 2601
    DOI: 10.1039/C2CE26557E

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