Growth and Photocatalytic Activity of Dendrite-like ZnO@Ag Heterostructure Nanocrystals

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• 作者：Changdong Gu ; Chun Cheng ; Haiyou Huang ; Tailun Wong ; Ning Wang ; Tong-Yi Zhang
• 刊名：Crystal Growth & Design
• 出版年：2009
• 出版时间：July 1, 2009
• 年：2009
• 卷：9
• 期：7
• 页码：3278-3285
• 全文大小：485K
• 年卷期：v.9,no.7(July 1, 2009)
• ISSN：1528-7505

文摘

Dendrite-like ZnO@Ag heterostructure nanocrystals are designed and fabricated by a facial two-step chemical method in a large scale. The heterostructure nanocrystals are composed of single crystal Ag nanowires as trunks and highly dense (0001) oriented ZnO nanorods as branches. ZnO nanorods with diameters of about 50−400 nm are vertically grown on the six lateral surfaces of the Ag nanowires. Ultrathin ZnO nanowires or nanotubes with a diameter of less than 30 nm are decorated on the ZnO nanorods. The photocatalysis test shows that the ZnO@Ag heterostructures exhibit a higher photocatalytic activity than the pure ZnO nanorods, thereby implying that the Ag/ZnO interfaces promote the separation of photogenerated electron−hole pairs and enhance the photocatalytic activity.