(1. 苏州科技学院 江苏省环境功能材料重点实验室，苏州 215009；
2. 苏州科技学院 化学与生物工程学院，苏州 215009；
3. 江苏大学 材料科学与工程学院，镇江 212013)
摘 要: 以炭膜包裹的形式将TiO2固载到微纳米多孔碳质材料表面，制得微纳米多孔炭/TiO2复合材料(MNC-TiO2)。采用X射线衍射仪、扫描电子显微镜、透射电子显微镜、比表面积及孔径分析仪和X射线光电子能谱对材料的结构进行表征。结果表明：当溶液的蔗糖含量为0.5%、TiO2负载量为10%，热处理温度为750 ℃时，复合材料具有最好的苯酚处理性能(达92.7%)；炭膜包裹工艺保证TiO2均匀涂覆在MNC的外表面，抑制TiO2的晶型转变，且降低其禁带宽度；吸附–催化的协同作用机制使得MNC-TiO2对于苯酚的总体处理效果大幅提高，而不是吸附和光催化的简单叠加。
关键字: 微纳米多孔碳质材料；膨胀石墨；活性炭；协同作用机制
（1. Jiangsu Key Laboratory for Environment Functional Materials,
Suzhou University of Science and Technology, Suzhou 215009, China;
2. Department of Chemistry and Bioengineering, Suzhou Unive）
Abstract:A micro/nano-porous carbon material-TiO2 (MNC-TiO2) was prepared by immobilized carbon coated TiO2 to the surface of MNC. The microstructure of the MNC-TiO2 was analyzed by X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption and X-ray photoelectron spectroscopy (XPS). The results show that, at the sucrose content of 0.5% in solution, TiO2 loading of 10% and heat treatment temperature of 750 ℃, the MNC-TiO2 has the best phenol removal efficiency of 92.7%. In addition, MNC-TiO2 still retains the original morphology of MNC. TiO2 were mainly introduced on the outer surface of MNC-TiO2 while little in internal pores. The structure restrains the transformation of TiO2 crystal and reduces its band gap. The adsorption-photocatalytic synergistic mechanism plays the key role in improving the effect of adsorption-photocatalytic degradation. The overall phenol treatment by MNC-TiO2 is not a simple sum of adsorption and photocatalytic activity.
Key words: micro-nano porous carbon material; expanded graphite; activated carbon; synergistic mechanism
