CTAB-mediated synthesis and characterization of ZnO/Ag core-shell nanocomposites

被引：0
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作者：
Khan, Majid [1 ]
Wei, Chengsha [1 ]
Chen, Mingming [1 ]
Tao, Jiaojiao [1 ]
Huang, Ningdong [1 ]
Qi, Zeming [1 ]
Li, Liangbin [1 ]
机构：
[1] Khan, Majid
[2] Wei, Chengsha
[3] Chen, Mingming
[4] Tao, Jiaojiao
[5] Huang, Ningdong
[6] Qi, Zeming
[7] Li, Liangbin
来源：
Qi, Z. (zmqi@ustc.edu.cn) | 1600年 / Elsevier Ltd卷 / 612期
关键词：
In this paper; ZnO/Ag core-shell hybrid nanocomposites have been prepared by a very simple chemical methodology. ZnO nanorods were employed as core material for Ag seeds; and subsequent nucleation and growth of Ag nanoparticle by a cationic surfactant cetyltrimethylammonium bromide (CTAB) formed the ZnO NRs/Ag core-shell nanocomposites. In addition; their morphology; microstructure and optical properties have been characterized by X-ray diffraction; Raman Spectroscopy; field emission scanning electron microscopy; transmission electron microscopy; UV-Vis absorption and photoluminescence spectroscopy. It was found that face-center-cubic Ag nanoparticles with an average diameter of 20 nm were coated onto the surface of hexagonal phase ZnO nanorods with a minimum of 0.09 mmol concentration of CTAB. The excitonic absorption band and surface plasmon absorption band of the ZnO NRs/Ag nanocomposites revealed red-shifts relative to pure ZnO nanorods and metallic Ag nanoparticles. The coating of Ag nanoparticles onto the ZnO nanorods show red-shift in the near band edge (NBE) luminescence spectra and a reasonable detraction in the deep level emission (DLE) spectra compared with the pure ZnO nanorods. These interpretations demonstrated the strong interfacial interaction between Ag nanoparticles and ZnO nanorods. Furthermore; the annealing of ZnO NRs/Ag nanocomposite at 200 °C was done and improvement occurs in the crystallinity and binding strength of Ag nanoparticles. © 2014 Elsevier Inc. All rights reserved;
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页码：306 / 314
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