Study On Template-free Preparation And Properties Of Copper And Cuprous Oxide Nanometer Materials

In this paper, the convenient template free processes for the preparation of copper and cuprous oxide nanometer materials are reported, and the properties of the materials are studied.Cu2O hollow nanospheres were first generated through a template free process, and then Cu hollow nanospheres were prepared with Cu2O hollow nanospheres as precursor and H2 as the reductant. During the preparation of the precursor, nanospheres formed in absolute alcohol were smaller in size than in tert-butyl alcohol in the similar reaction conditions. The Cu2O hollow nanospheres prepared in tert-butyl alcohol were chosen as the precursor, since the production rate(75%) is higher than in absolute alcohol(70%). The reduction time and temperature of hydrogen reduction were studied: the well-dispersed Cu hollow nanospheres can be fabricated at 170°C with a reduction time of 2 hours. Moreover, a remarkable blue-shift phenomenon was found in the ultraviolet–visible light (UV–visible) absorption spectra of both Cu and Cu2O hollow nanospheres. During the preservation of the Cu2O hollow nanospheres, a well-regulated tetrakaidecahedron of the surface morphology with a core-shell structure formed.Under the protection of NH3 gas, Cu hollow nanospheres were prepared by a refluxing method, with Tert-Butyl alcohol as the organic solvent, and acetate monohydrateas as the source of copper. The produtions are hollow nanospheres with a diameter of about 400nm. The dose of the reducer plays an important role on the purity of the production.