In situ synthesized Au-Ag nanocages on graphene oxide nanosheets: A highly active and recyclable catalyst for the reduction of 4-nitrophenol Article

Hong, M, Xu, L, Wang, F et al. (2016). In situ synthesized Au-Ag nanocages on graphene oxide nanosheets: A highly active and recyclable catalyst for the reduction of 4-nitrophenol . New Journal of Chemistry, 40(2), 1685-1692. 10.1039/c5nj02978c

cited authors

  • Hong, M; Xu, L; Wang, F; Xu, S; Li, H; Li, CZ; Liu, J

abstract

  • Graphene oxide-supported hollow Au-Ag alloy nanocages (AuAgNC/GO) with tunable shell composition were in situ fabricated by employing a galvanic replacement reaction (GRR) between HAuCl4 and Ag nanoparticles loaded on graphene oxide nanosheets (AgNP/GO). AgNPs on the graphene oxide nanosheets were first synthesized as sacrificial templates by the microwave method. The as-synthesized hybrid materials were characterized by TEM, EDX, HAADF-STEM, XRD and XPS. On the well-known 4-nitrophenol (4-NP) reduction to 4-aminophenol (4-AP) in the presence of excess borohydride, AuAgNC/GO as a solid phase heterogeneous catalyst has been investigated, which exhibited a short induction time, high catalytic activity and good stability against agglomeration for the reduction.

authors

publication date

  • February 1, 2016

published in

Digital Object Identifier (DOI)

start page

  • 1685

end page

  • 1692

volume

  • 40

issue

  • 2