管壁具有球形介孔的左手螺旋二氧化硅纳米管的制备

Preparation of left-handed helical silica nanotube with spherical mesopores in the wall

通过双模板方法合成了一种管壁具有球形介孔的单手螺旋二氧化硅纳米管.其中,手性两亲性小分子的自组装体控制纳米管的形貌,三嵌段共聚物F127控制管壁中介孔结构和孔径.并借助透射电子显微镜、扫描电子显微镜、多通道物理吸附与孔径分布仪和X-射线多晶衍射分析方法对样品进行了表征.结果表明,此材料的比表面积高达799m2/g,孔径大约是5.7nm.

Single-handed silica nanotubes with mesopores in their walls were prepared using a dual-tem- plating approach. The results indicated that the morphology and the mesopores were controlled by the chiral low-molecular-weight amphiphiles （LMWAs） and the F127 triblock copolymer, respectively. The obtained samples were characterized using field-emission scanning electron microscopy, transmis- sion electron microscopy, N2 sorption measurements, and X-ray diffraction. The results showed that the BET surface areas reached 799 mg/g and the diameter of the mesopores was 5.7 nm.