CTAB-mediated synthesis and characterization of ZnO/Ag core–shell nanocomposites
CTAB-mediated synthesis and characterization of ZnO/Ag core–shell nanocomposites
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DOI：
10.1016/j.jallcom.2014.05.209
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发表时间：
2014-11
影响因子：
6.2
通讯作者：
Majid Khan;Chengsha Wei;Mingming Chen;Jiaojiao Tao;Ningdong Huang;Z. Qi;Liangbin Li
中科院分区：
文献类型：
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作者：
Majid Khan;Chengsha Wei;Mingming Chen;Jiaojiao Tao;Ningdong Huang;Z. Qi;Liangbin Li
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.
