The effect of PVP on the formation and optical properties ZnO/Ag nanocomposites

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• 作者：Guiye Shan ; ^{shangy229@nenu.edu.cn} ; Huawei Hao ; Xiaomeng Wang ; Zhaojiang Shang ; Yanwei Chen ; Yichun Liu
• 关键词：ZnO ; Ag ; PVP ; Nanocomposites ; Structure ; Optical
• 刊名：Colloids and Surfaces A: Physicochemical and Engineering Aspects
• 出版年：2012
• 出版时间：5 July, 2012
• 年：2012
• 卷：405
• 期：Complete
• 页码：1-5
• 全文大小：1093 K

文摘

ZnO/Ag nanocomposites have been prepared by two-step reduction method. Firstly, ZnO core seeds were prepared by the reaction of zinc acetate with KOH under magnetic stirring condition in the presence of poly (N-vinyl-2-pyrrolidone) (PVP). Then, Ag nanoparticles were overgrown on ZnO core seeds with reduction by PVP. ZnO/Ag nanocomposites were characterized by TEM, photoluminescence, UV-visible absorption spectra and XRD. ZnO/Ag nanocomposites exhibit excellent resonance Raman properties. It was found that the metallic Ag in the ZnO/Ag act as electron acceptor to improve the optical properties.