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论文类型：期刊论文
发表时间：2011-10-01
发表刊物：NANOSCALE
收录刊物：SCIE、EI、Scopus
卷号：3
期号：10
页面范围：4195-4200
ISSN号：2040-3364
摘要：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.