Acta Phys. -Chim. Sin. ›› 2008, Vol. 24 ›› Issue (01): 97-102.doi: 10.3866/PKU.WHXB20080117

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Preparation and Properties of Carbon Nanotube-TiO2 Nanocomposites

WU Yu-Cheng; LIU Xiao-Lu; YE Min; XIE Ting; HUANG Xin-Min   

  1. School of Material Science and Engineering, Hefei University of Technology, Hefei 230009, P. R. China
  • Received:2007-06-18 Revised:2007-10-16 Published:2008-01-05
  • Contact: WU Yu-Cheng

Abstract: Coating carbon nanotube surface with TiO2 as anatase was performed by sol-gel method using Ti(OBu)4. The morphological structure of the photocatalyst particles was characterized by XRD and TEM. Absorbency was analyzed by the UV-Vis diffuse reflection spectra of TiO2 and CNT-TiO2 photocatalysts. The photocatalytic activities of the materials heat-treated at different reaction temperatures have been tested on decomposable substrate methyl orange solution under UV-light illumination. The results showed that the nanocomposites had excellent photocatalytic ability. When the wavelength was between 200 -800 nm, CNT-TiO2 nanocomposites had good absorbency. TEM micrographs showed that TiO2 was closely coated on the surface of carbon nanotubes. The best heat treatment temperature of CNT-TiO2 nanocomposites was 450 ℃. The crystal formof TiO2 was anatase and the diameter of crystal was 7.3 nm. The photodegradation rate of CNT-TiO2 nanocomposites was better than that of pure TiO2 under sunlight.

Key words: Sol-gel method, TiO2, CNTs, Photocatalysis