以合成的水溶性酚醛树脂(PF)和TiO2为原料,在N2气氛下焙烧制备了碳改性TiO2催化剂PF/TiO2,并采用X射线衍射、扫描电子显微镜、X射线光电子能谱和紫外-可见漫反射吸收光谱对样品进行了表征.结果表明,PF/TiO2催化剂具有和原料TiO2相同的晶相和形貌,且在可见光区产生明显的吸收.另外,在样品表面存在Cn,C-OH(C-O-C)和C=O(COO)物种,表明其表面存在石墨C材料.这证实沉积在TiO2表面的PF在焙烧过程中发生了碳化.以甲基橙为模型污染物,在可见光下评价了PF/TiO2的光催化性能,发现PF/TiO2的光催化剂活性大大高于TiO2.当PF用量为2%时,PF/TiO2中碳含量为1.33%,此时催化剂的可见光光催化活性最高.
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