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

Kexin Yao, Xin Liu, Lan Zhao, Huachun Zeng, Yu Han

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

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.
Original languageEnglish (US)
Pages (from-to)4195
JournalNanoscale
Volume3
Issue number10
DOIs
StatePublished - 2011

ASJC Scopus subject areas

  • Materials Science(all)

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