Preparation Of Low-dimensional Oxide Nanocomposites And Its Properties Studies

Currently, two major problems: energy and environment caused global attention, andnew materials researches and developments around these two issues have also been gottena great deal of attention at home and abroad in the field of materials, chemistry, physicsand other interdiscipline. So far, good progress of many advanced functional materials andapplications have been made. Which functional nanomaterials is one of the representativecandidates. Such materials include: inorganic, organic and functional nanocomposite materials etal. Among these frontier hot nano/micro-structutred functional materials, TiO2and ZnO havemany important properties and potential applications in photocatalysis, solar cells, sensors, et al.due to the simple preparation, morphology controlled and many other excellent physical andchemical properties. For many years, good progress was made through morphology tailoring,composite doping and other means to the TiO2and ZnO system. But the spectral response tovisible light is still facing a lot of challenges.ThestudypreparedTiO2nanotubes, ZnO nano-films as body materials byhydrothermalmethod,using a variety of modification approaches to prepare a series of heterostructuredfunctional nanocomposites, adoptting various methods to expand its spectral response, andconducted research on its surface and interfacial properties, including oxides, sulfides, noblemetals, organic and polymer modification and nanocomposite.For the modification with oxide, we mainly use copper oxide, cuprous oxide et al, preparingheterostructured functional materials; for the modification with sulfide, we mainly adopt coppersulfide, cadmium sulfide, lead sulfide, and so on. The as-prepared nanocomposite wascharacterized by XRD (X-ray diffraction), SEM (Scanning electron microscopy), TEM(Transmission electron microscope), FTIR (Fourier Transform infrared spectroscopy), UV-Vis(Ultraviolet-visible spectroscopy), PL (Photoluminescence) of the microstructure and properties.For the organic modification, we mainly used porphyrin compounds, peroxidase and somefunctional polymer on the preliminary modification, and has made some preliminary results. For the properties study, we mainly choose the representative as-prepared nanocomposite andits modified products, and carried out some experimental properties studies. We used two typeprototype devices to study the electrical responses and adsorption responses of nanocomposites.Firstly, fabricated interdigital electrodes on flexible polymer substrates to study the electricalresponse; Secondly, fabricated QCM (quartz crystal microbalance) sensors and their arrays toexamine the response characteristics of the all kinds of heterostructured nanocomposite to theVOC, and some good results were achieved. The method can also be extended to study the surfaceand interface characteristics of other nanocomposites or other devices applications.