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以膨胀石墨(EG)/活性炭复合材料(EGC)为基体,以蔗糖为原料引入炭包覆纳米TiO2,制备了负载纳米TiO2膨胀石墨/活性炭复合材料(TiO2/EGC);采用SEM、TEM、XRD及低温液氮吸附法对TiO2/EGC的微观形貌、孔结构和相关性能进行了表征.结果表明:EGC基体中不仅有微米级大孔作为吸附通道,而且有纳米级微孔作为选择性富集、吸附有机物的主体;EGC的比表面积为1579 m2·g-1,约为EG的40倍,经负载纳米TiO2后,比表面积下降不大,其吸附能力却有所提高;包覆炭膜的TiO2主要分布在基体的表面且分布相对均匀,没有明显的团聚现象且负载牢固;以苯酚为目标降解物,TiO2的存在大大提高了EGC对苯酚的处理能力.

参考文献

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