Controlled-Synthesis of Copper Sulfide Hollow Spheres and Nanowires by a Simple Hydrothermal Process

摘要

A simple hydrothermal process has been proposed to the synthesis and assembly of copper sulfide hollow spheres and nanowires. The typical X-ray diffraction pattern (XRD) showed that the product was hexagonal phase copper sulfide with lattice constants of a = 3.788 A and c = 16.357 A. Scan-ning electron microscopy (SEM) were used to observe the morphologies of the products under the different growth conditions. The UV-vis absorption spectra and photoluminescence spectra were investigated their intrinsic optical properties. PL spectra indicated that CuS hollow spheres had emission peaks at 412.5 nm and 430.8 nm when the excitation wavelength was 370 nm. For CuS nanowires and short nanorods, an emission maximum at 435.5 nm is found. However, no photolumi-nescence peak can be detected for flower-like CuS nanospheres. Possible aggregation mechanisms for the hollow spheres and nanowires were proposed.