Alumina nanotubes: preparation and textural, structural and morphological characterization

被引：12

作者：

Diniz, Cristina Fontes

Balzuweit, Karla

Mohallem, Nelcy Della Santina ^{[1
]}

机构：

[1] Univ Fed Minas Gerais, Dept Quim, Mat Lab, Belo Horizonte, MG, Brazil

[2] Univ Fed Minas Gerais, Dept Fis, Belo Horizonte, MG, Brazil

来源：

JOURNAL OF NANOPARTICLE RESEARCH | 2007年 / 9卷 / 02期

关键词：

porous alumina; alumina nanotubes; sol-gel process; hypercritical drying; colloids; synthesis;

D O I：

10.1007/s11051-005-9039-4

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Alumina nanotube was synthesized by hydrolysis of aluminum isopropoxide followed by gelation and drying under hypercritical condition. The influence of temperature on the structural, textural, and morphological properties of the material was studied by powder X-ray diffraction, infrared spectroscopy, nitrogen adsorption, thermal analysis, scanning and transmission electronic microscopy. The as-prepared alumina (300 degrees C) was formed by boehmite crystallites. Its structure collapsed after heating (500-1200 degrees C) yielding gamma, delta and theta alumina nanophases. The aerogel surface area changed from 254 to 99 m(2) g(-1) in this heating range. The formation of alumina nanotubes was verified by transmission microscopy analysis at the heating range.

引用

页码：293 / 300

页数：8

共 30 条

[1] Porous inorganic materials [J].