碳纤维负载TiO_2光催化薄膜的制备及其性能

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

以PAN基碳纤维(CF)为基体,钛酸丁酯为前驱体,通过溶胶凝胶浸渍涂覆法将TiO2负载于经过表面修饰的CF上,制备CF负载的TiO2光催化薄膜。采用扫描电子显微镜(SEM)和X射线衍射仪(XRD)表征了制备材料的形态结构,通过超声振荡清洗测试了CF对TiO2的负载牢度,以质量浓度为80mg/L的酸性橙Ⅱ溶液为目标降解物,测试了材料在紫外线光照下的催化性能。结果表明:溶胶浓度影响制备材料的形态结构、CF对TiO2的负载率及负载牢度;溶胶浓度和退火温度对制备材料的催化活性有明显的影响。Ti浓度为0.5mol/L的溶胶制备的TiO2/CF负载牢度好,负载率高,催化活性好。

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.