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Graphene Based Copper‐Nickel Bimetal Nanocomposite: Magnetically Separable Catalyst for Reducing Hexavalent Chromium
Author(s) -
Yao Dachuan,
Xu Tingting,
Yuan Jingjing,
Tao Yingrui,
He Guangyu,
Chen Haiqun
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201904931
Subject(s) - bimetal , nanocomposite , graphene , materials science , hexavalent chromium , catalysis , nickel , copper , oxide , chromium , chemical engineering , inorganic chemistry , metallurgy , nanotechnology , chemistry , organic chemistry , engineering
Graphene based copper‐nickel bimetal nanocomposite (Cu 3 Ni 2 ‐rGO) was prepared via a one‐step solvothermal procedure, in which Ni(OH) 2 and Cu(OH) 2 were used as precursors. Structural characterization confirms that the as‐prepared Cu 3 Ni 2 ‐rGO nanocomposite is composed of Cu 3 Ni 2 nanoparticles in the size range of 20–100 nm and the reduced graphene oxide (rGO) sheets. Benefiting from the combination of Cu 3 Ni 2 and rGO, the Cu 3 Ni 2 ‐rGO nanocomposite exhibits excellent catalytic performance on reducing highly toxic Cr(VI) at room temperature. The reduction of Cr(VI) (40 mL, 100 mg L −1 ) can be completed within 6 min using Cu 3 Ni 2 ‐rGO nanocomposite as the catalyst, which is much more efficient than using monometallic nanocomposite containing only Cu or Ni. Moreover, Cu 3 Ni 2 ‐rGO nanocomposite can be magnetically separated, which enables effective recycle. Besides, Cu 3 Ni 2 ‐rGO shows good cycling stability.