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

Shan Wang, Shaoyu Niu, Haosheng Li, Ka Kin Lam, Zongrong Wang, Piyi Du, Chi Wah Leung, Shaoxing Qu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number385603
JournalNanotechnology
Volume30
Issue number38
DOIs
Publication statusPublished - 11 Jul 2019

Keywords

  • catalyst
  • core shell
  • high efficiency
  • nanowires
  • recyclability

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Cite this