Synthesize Of Metal Oxide Nano-materials By Polymer-assistant And Properties Research

Recent advances in the field of nanotechnology have led to the synthesis and characterization of an assortment of quasi-one-dimensional (Q1D) structures, such as nanowires, nanoneedles, nanobelts and nanotubes. The synthesize method of metal oxide semiconductor nano-materials, assisted by the polymer, belongs to the process of nano-materials solution-phase self-synthesize. Polyvinyl Alcohol is a soluble macromolecule materials. It has strict linear structure, and there are a lot of dissociated hydroxide, which is effective for limiting the metal ion into the certain space.This research tried to research a fabrication method, assisted by Polyvinyl Alcohol (PVA), to produce metal oxide semiconductor nano-materials. And the paper includes the contents as followed.First, using this method, ZnO nanobelts (which the thickness is about a few ten nanometers, the length is about 10～30μm,and the width is about 1～2μm); nanowires (which the diameter is about 100～200nm, and the length is about 1～2μm) have been successfully produced. The products were characterized by SEM, XRD and TEM. The influence factors of nano-structure for the different thermal treatment process and the growth mechanism have been analyzed.Second, put this fabrication method onto the nano-materials production of some other metal oxides. For the different characters of different metal acetates, adjust the process parameters properly. The nano-structures of Co3O4,MgO,CuO have been produced successfully, and the products were characterized by SEM, XRD and TEM.Third, analyzed the luminescent properties of the ZnO nano-materials made by this method, and acquired the photoluminescence spectra. There are two obivious diffraction peaks can be seen in the spectra. The wavelength are 521.3nm and 383.9nm, which the first one belongs to the green region(500～570nm) and the other to the UV. The resource of the green band emission have been analyzed. And through the analysis of patterns'PL spectra under different thermal treatment method, we have proved that the high temperature heat-treatment is good for the yield of nanostructure production. Using the fabrication method of nano-materials, assisted by macromolecule polymer, simplify the fabrication process of nano-materials, and reduce the cost of synthesis. And control the thermal treatment process to improve the yield of nanostructure production. The nano-structures of Co3O4,MgO,CuO have been produced successfully, do a good preparation for their properties research.