C/TiO_2复合材料的制备及光催化性能的研究

Preparation of C /TiO_2 composites and study of its photocatalytic property

采用溶胶—凝胶法制得了C/TiO2复合光催化剂,并采用X射线衍射(XRD)﹑扫描电子显微镜(SEM)﹑紫外光谱等方法对复合材料进行了表征。以1-萘胺-4-偶氮对苯磺酸为模型化合物评价了C/TiO2复合材料的光催化性能,考察了降解时间、初始浓度和催化剂投加量等因素对降解率的影响。研究表明,在1-萘胺-4-偶氮对苯磺酸初始浓度为2×10-5mol/L,催化剂投加量为1.0 g/L时,光催化反应5 h后,1-萘胺-4-偶氮对苯磺酸的降解率达到85.41%。

C/TiO2 composite were prepared by the traditional sol-gel method .The samples were characterized by X-ray diffraction, scanning electron microscopy , UV-visible spectroscopy and their photocatalytic properties were evaluated with 1 -naphthylamine -4 -azo benzene sulfonic acid .The effect of photodegradation time , initial con-centration , catalyst quantity on degradation rate was investigated .The degradation rate reached the maximum to 85 .41 %by illumination after 5 h when the original concentration of was 1-naphthylamine -4-azo benzene sulfon-ic acid 2 ×10 -5 mol/L, additive amount of photocatalyst was 1.0 g /L.