Preparation And Properties Of Zinc Or Copper-Ⅵ A Compound Nanostructured Films

Based on the project supported by National Nature Science Foundation of China“Design, Preparation and Property Study of Multilayer Hollow Structure of InorganicNanomaterials”, nanostructured ZnS and CuO films have been respectively prepared. Thesamples were characterized by X-ray powder diffraction （XRD）, transmission electronmicroscopy （TEM）, field-emission scanning electron microscopy （FESEM） andphotoluminescence （PL）. Based on the experimental results, a possible formationmechanism has been proposed. Moreover, the properties of the as-prepared samples havebeen studied.Well-aligned array films of polycrystalline ZnS nanotubes with close-tips have beensuccessfully prepared by using ZnO nanorod arrays grown on zinc sbustrate as sacrificialprecursors. The method is based on chemical conversion and inward etching of the ZnOsacrificial precursors. The highly-ordered ZnS nanotube arrays are300nm in averagediameter,6-8μm in length and about60nm in wall thickness. A room temperaturephotoluminescence-type gas sensing device based on the nanostructured array films hasbeen established to investigate their humidity sensing properties. ZnS nanotube array-basedsensor presents higher response and quicker response/recovery than the precursor ZnOnanorod arrays and the intermediate ZnO/ZnS nanorod arrays, respectively. Moreover, theZnS nanotube array-based sensor exhibits good linearity in response to relative humidity（RH） and reliable reproducibility in a wide range of RH （0-65%） at room temperature.Comparing the different sensing behaviors of the three nanostructured films, we discussedthe humidity sensing mechanism of ZnS nanotube arrays.Cu（OH）₂nanowire film with10-50nm in diameter and length up to tens ofmicrometers has been prepared in SDS/water/isooctane/n-butanol microemulsion and thenfurther converted into CuO film which retains the nanowire structures. The as-preparedCuO nanowire films have been used directly for electrodes of coin-type Lithium-ionbatteries and presented good discharge capacity and cycling performance.