摘要
通过二氧化钛与氢氧化钠溶液反应制备成功半径 9nm的结晶度很好的纳米管材料。高分辨透射电镜研究显示大部分纳米管是顶端开口的螺旋型纳米管。用X射线能谱和能量损失谱研究了孤立纳米管的成分 ,发现氧与钛的原子比并不为一定值。化学分析和红外光谱研究显示材料中含成键的氢。综合电子衍射、X射线衍射、高分辨电子显微术和计算机模拟研究了纳米管的结构。该纳米管是由具有单斜结构的钛酸形成的 ,钛酸的 (1 1 0 )层面沿 [0 0 1 ]方向卷曲形成管轴平行 [0 1 0
Well crystallized nanoscale tubular materials with diameter around 9 nm have been synthesized via the reaction of TiO 2 crystals and NaOH aqueous solution. High resolution transmission electron microscopy (HRTEM) study shows that a large part of the tubular materials are scroll nanotube with open end. The composition of single nanotubes is studied using energy dispersive X ray spectroscopy (EDS) and electron energy loss spectroscopy (EELS) and the atomic ratio of O/Ti is found to vary from tube to tube. Chemical analysis and infrared (IR) spectroscopy study suggest the existence of bonded hydrogen in the material. Electron diffraction, X ray diffraction, HRTEM and image simulation are used to study the structure of the nanotube. The nanotube is found to derive from H 2Ti 3O 7 trititanate which has monoclinic structure given by Feist and Davies, i.e. and the tube is formed by wrapping a (100) sheet of H 2Ti 3O 7 along [001] and with the tube axis parallel to [010].
出处
《电子显微学报》
CAS
CSCD
北大核心
2002年第3期265-269,共5页
Journal of Chinese Electron Microscopy Society
基金
item :NationalNaturalScienceFoundationofChina
PekingUniversityandMinistryofScienceandTechnologyofChina(No .0 0 1CB6 1 0 5 0 2 )
