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Title: Site-specific growth of Au particles on ZnO nanopyramids under ultraviolet illumination
Authors: Yao, K.X.
Liu, X.
Zhao, L.
Zeng, H.C. 
Han, Y.
Issue Date: Oct-2011
Citation: Yao, K.X., Liu, X., Zhao, L., Zeng, H.C., Han, Y. (2011-10). Site-specific growth of Au particles on ZnO nanopyramids under ultraviolet illumination. Nanoscale 3 (10) : 4195-4200. ScholarBank@NUS Repository.
Abstract: In this work, wurtzite ZnO nanocrystals with unique "pyramid" morphology were firstly prepared via solvothermal 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. © 2011 The Royal Society of Chemistry.
Source Title: Nanoscale
ISSN: 20403364
DOI: 10.1039/c1nr10685f
Appears in Collections:Staff Publications

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