Abstract:

Photocatalysed titanium dioxide (TiO2) thin film was prepared and deposited on polyacrylonitile based carbon fiber (PAN-CF) substrates with tetrabutyl titanate as precursor through a facile sol-gel dip coating technique. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were utilized to investigate the morphologies and structures of the photocatalysed TiO2/CF film. The load fastness of TiO2 on CF was evaluated by ultrasonic vibration method and the photocatalytic properties of TiO2/CF film were investigated by degrading acid orange Ⅱ (80mg/L) under UV irradiation. The results suggest that the concentration of the sol have significant effects on the morphologies and structures of TiO2/CF film, the load rate of TiO2 and load fastness. It is also shown that the catalytic activity of TiO2/CF film was remarkably influenced by concentrations of the sol and annealing temperature. As the results indicated, the TiO2/CF prepared from the Ti sol with concentration of 0.5 mol/L displayed better load fastness, higher load rate and excellent catalytic performance.