Solvothermal coordination-reduction route to gamma-NiSb nanocrystals at low temperature

摘要

A very mild synthesis of nanocrystalline gamma -NiSb via a novel solvothermal coordination-reduction process is reported here. The reaction of the mixture of NiCl2, antimony, and KBH4 was carried out in ethylenediamine (en) at 140 degreesC for 24 h. X-ray powder diffraction and transmission electron microscope images show that the products are hexagonal gamma -NiSb phase and well crystallized with an average size of about 15 nm, The reaction proceeds through a metallic nickel intermediate, The morphology of the products was influenced markedly by the solvents, and a dendritic crystal of NiSb was obtained in diethylamine. The products were also investigated by UV/vis absorption, photoluminescence, X-ray photoelectron spectra, and Fourier-transform IR. (C) 2000 Academic Press. [References: 27]