Abstract: Cu2(OH)3NO3@SiO2 nanodisks were prepared by one-pot synthesis through in-situ reaction between Cu(NO3)2 and ammonia in the reverse micelle,followed by TEOS hydrolysis.The shape transformation of Cu-SiO2 composite nanoparticles from spheres to disks was realized in reverse micelle by controlling ammonia concentration.The disk-shape of product was determined by hard template of layered Cu2(OH)3NO3 compound and the size was limited by the micelle.The materials were characterized by scanning electron microscope (SEM),transmission electron microscope (TEM) and X-ray diffraction (XRD).The nanodisk was an important raw material for Cu,Cu2O and CuO,@SiO2,which had an ultrahigh thermal stability.
[1] Murdoch G B,Greiner M,Helander M G,et al.A comparison of CuO and Cu2O hole-injection layers for low voltage organic devices[J].Applied Physics Letters,2008,93(8):318-321. [2] White C B,Yin M,Hall A,et al.Complete CO oxidation over Cu2O nanoparticles supported on silica gel[J].Nano Letters,2006,6(9):2095-2098. [3] Fan Haiming,Yang Lintao,Hua Wenshen,et al.Controlled synthesis of monodispersed CuO nanocrystals[J].Nanotech-nology,2004,15(1):37-42. [4] Musa A O,Komolafe T A,Carter M J.Production of cuprous oxide,a solar cell material,by thermal oxidation and a study of its physical and electrical properties[J].Solar Energy Materials & Solar Cells,1998,51(3/4):305-316. [5] Li Wenjun,Zhao Dongyuan.Extension of the stöber method to construct mesoporous SiO2 and TiO2 shells for uniform multifunctional core[J].Advanced Materials,2013,25(1):142-149. [6] Pastorizasantos I,Jorge Pérezjuste A,Lizmarzá n L M.Silica-coating and hydrophobation of CTAB-stabilized gold nanorods[J].Chemistry of Materials,2006,18(10):2465-2467. [7] Li J,Zeng H C.Size tuning,functionalization,and reactivation of Au in TiO2 nanoreactors[J].Angewandte Chemie,2005,36(41):4342-4345. [8] Hirakawa T K,Kamat P V.Charge separation and catalytic activity of Ag@TiO2 core-shell composite clusters under UV-Irradiation[J].Journal of the American Chemical Society,2005,127(11):3928-3934. [9] Niu Haixia,Yang Qing,Tang Kaibin.A new route to copper nitrate hydroxide microcrystals[J].Materials Science and Engineering B,2006,135(2):172-175.