YOU Yang ¹, WAB Long ¹, ZHANG Shiying ^1,2, WU Luoyi ¹

(1.College of Material Science and Engineering, Hunan Univers ity, Changsha 410082;2.Department of Biological and Environmental Science, Changsha Univers ity, 410003)

Abstract: The TiO₂ nanofibers were succes s fully synthes ized by hydrothermal method.25ml Potas s ium hydroxide solution (10mol/L) and titanium dioxide particles of proper quality were mixed as precursor.In this work, Transmis s ion electron microscope (TEM),X- ray diffraction patterns (XRD), Fourier-trans form infrared spectra (FT- IR) and Specific surface area (BET) were used to inves tigate the s tructure, microcosmic morphology and chemical component of the TiO₂nanofibers .The results show that the product was H₂Ti₃O₇. Its structure trans formed and the intens ity of absorb apex in Fourie -trans form infrared spectra depres sedafter calcined. The aspect ratio of product was attain to 50 and growing uniformly. Compared with titanium dioxide powders,the surface area of TiO₂ nanofibers are greatly increased to 372.67m²/g. The experiment of photocatalytic degradation methylene blue indicated that photocatalytic activity of TiO2 fiber calcined at 550℃ was higher than that of lower concentration when the concentration of organic compound was fixed.

Keywords: hydrothermal method, nanofibres,titania dioxide