Synthesis and controlled morphology of Ni@Ag core shell nanowires with excellent catalytic efficiency and recyclability

Ni@Ag core shell nanowires (NWs) were prepared by in situ chemical reduction of Ag+ around NiNWs as the inner core. Different Ni@Ag NWs with controllable morphologies were achieved through the layer-plus-island growth mode and this mechanism was confirmed by scanning electron microscopy, X-ray fluor...

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Bibliographic Details
Published in:Nanotechnology 2019-09, Vol.30 (38), p.385603-385603
Main Authors: Wang, Shan, Niu, Shaoyu, Li, Haosheng, Lam, Ka Kin, Wang, Zongrong, Du, Piyi, Leung, Chi Wah, Qu, Shaoxing
Format: Article
Language:English
Subjects:
catalyst
core shell
high efficiency
nanowires
recyclability
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Summary:Ni@Ag core shell nanowires (NWs) were prepared by in situ chemical reduction of Ag+ around NiNWs as the inner core. Different Ni@Ag NWs with controllable morphologies were achieved through the layer-plus-island growth mode and this mechanism was confirmed by scanning electron microscopy, X-ray fluorescence, and X-ray photoelectron spectroscopy analyses. When used as a catalyst, the synthesized Ni@Ag NWs exhibited high reduction efficiency by showing a high reaction rate constant k of 0.408 s−1 in reducing 4-nitrophenol at room temperature. Besides, combining the magnetic property, including high saturation magnetization and low coercivity, the magnetic NiNW core contributes to excellent recyclability and long-term stability with only a 2.2% performance loss after 10 recycles by magnets. The Ni@Ag NWs proposed here show unprecedentedly high potential in applications requiring high efficiency and a recyclable catalyst.
ISSN:0957-4484
1361-6528
DOI:10.1088/1361-6528/ab27ce