二氧化钛干凝胶水热法制备纳米管及其机理研究  

Preparation of Titania Nanotube by Hydrothermal Method in Xerogel and Mechanism Study

作　　者：孙振亚[1,2] 杜露[1] 彭茜茜[1] 杨颖[1] 

机构地区：[1]武汉理工大学资源与环境工程学院,武汉430070 [2]武汉理工大学材料研究与测试中心,武汉430070

出　　处：《武汉理工大学学报》2012年第8期1-4,共4页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(40372028)

摘　　要：以溶胶凝胶法自制的干凝胶为原料,通过水热法和离子交换成功制备出长为50～300nm,直径为5～10nm的纳米管。采用TEM、XRD分析手段,对在不同工艺条件下获得产物的形态和结构进行表征。结果表明,水热后生成的纳米粉体为纳米片,经H+交换后,纳米片成功的卷曲成纳米管,且合成纳米管的成分为H2Ti5O11.3H2O,结晶度相对纳米颗粒而言有所降低。Titanate nanotubes have been sucessfully prepared by an alkaline hydrothermal process with TiO2 nanopowder as precursor which is prepared by sol-gel.The resultant nanotubes display external diameter between 5～10 nm and extent between 50～300 nm.Morphological and structural evolution of TiO2 nanotubes after hydrothermal process and ion-exchange reaction have been investigated by transmission electron microscopy（TEM）,X-ray diffraction analyses.The result shows that nano-plates are synthesized by hydrothermal method,and then convert to nanotubes after ion-exchange reaction.The crystallinity of synthetic nanotube with nominal composition of H2Ti5O11·3H2O has decreased than nanoparticle.

关 键 词：二氧化钛 干凝胶 纳米管 离子交换 

分 类 号：O641.41[理学—物理化学]