Preparation and performance of photocatalysed titanium dioxide thin film deposited on polyacrylonitile based carbon fiber

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 the concentrations of the sol and annealing temperature.As the results indicated,the TiO2/CF prepared from the Ti sol with concentration of 0.5mol/L displayed better load fastness,higher load rate and excellent catalytic performance.