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Issue 10, 2011
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Site-specific growth of Au particles on ZnO nanopyramids under ultraviolet illumination

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Abstract

In this work, wurtzite ZnO nanocrystals with unique “pyramid” morphology were firstly prepared viasolvothermal synthesis. It was determined that the ZnO nanopyramids are grown along the polar c-axis with the vertexes pointing to the [001] direction. When the mixture of ZnO nanopyramids and Au precursor (HAuCl4) was exposed to ultraviolet (UV) illumination, Au particles were site-specifically formed on the vertexes of ZnO nanopyramids. The obtained Au/ZnO nanocomposite showed significantly enhanced photocatalytic activity as compared to the bare ZnO nanopyramids. First-principles based calculations well explained the formation of ZnO nanopyramids as well as the site-specific growth of Au, and revealed that during the photocatalysis process the Au particles can accommodate photoelectrons and thus facilitate the charge separation.

Graphical abstract: Site-specific growth of Au particles on ZnO nanopyramids under ultraviolet illumination

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Publication details

The article was received on 25 Jun 2011, accepted on 22 Jul 2011 and first published on 24 Aug 2011


Article type: Paper
DOI: 10.1039/C1NR10685F
Citation: Nanoscale, 2011,3, 4195-4200
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    Site-specific growth of Au particles on ZnO nanopyramids under ultraviolet illumination

    K. X. Yao, X. Liu, L. Zhao, H. C. Zeng and Y. Han, Nanoscale, 2011, 3, 4195
    DOI: 10.1039/C1NR10685F

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