Preparation And Characterization Of Different Morphologies Of1D Ti-O Nanostructures

One-dimensional nanomaterials have attracted increasing attention over the pastdecades due to their novel optical, electronic, magnetic and chemical properties andtheir potential application.1D Ti-O nanomaterials were successfully synthesized via analkali-hydrothermal process. The products are characterized byThermogravimetric/Differential Thermal Analysis, X-ray Diffraction, Infrared Spectra,transmission electron microscopy and Scanning Electron Microscope.The main conclusions are as followings:1. A commercial anatase TiO₂powder was used as the precursor,9mol/L NaOHaqueous solution was used as solvent, when the hydrothermal treatment temperaturewas180℃i n a Teflon-lined autoclave for48h, sodium titanate （Na₂Ti₃O₇）, hydrogentitanate （H₂Ti₃O₇） and anatase （TiO₂） nanobelts could be obtained. The characterizationindicates that the nanobelts with typical widths of50to200nm, thicknesses of20to50nm, were up to one hundred micrometer in length. H₂Ti₃O₇nanobelts can be obtainedfrom Na₂Ti₃O₇by exchanging alkali ions with protons using dilute acid solution. Theanatase nanobelts can be obtained from H₂Ti₃O₇by a topochemical reaction anddehydrating process.2. A commercial anatase TiO₂powder was used as the precursor,10mol/L NaOHaqueous solution was used as solvent, when the hydrothermal treatment temperaturewas160℃in a Teflon-lined autoclave for48h, Ti-O nanotubles could be obtained.3. When the hydrothermal treatment temperature is high, it is easy to formnanobelts. When the hydrothermal treatment temperature is low, it is easy to formnanotubes. When the crystalline size of the precursor is small, it is easy to form fine ornarrow nanobelts or nanowires. When dispersion is good and particle distribution isnarrow of the precursor, uniform nanobelts can be obtained.