Azeotropic distillation-assisted preparation of macro-mesostructured γ-Al2O3 nanofibres of crumpled sheet-like morphology

被引：20

作者：

Cai, WQ ^{[1
]}

Li, HQ

Zhang, Y

机构：

[1] Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2006年 / 96卷 / 01期

基金：

中国国家自然科学基金;

关键词：

macro-mesostructured gamma-Al2O3; azeotropic distillation; H2O2; sodium aluminate solution; mechanism;

D O I：

10.1016/j.matchemphys.2005.06.053

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A three-step preparation of macro-mesostrucred gamma-Al2O3 nanofibres with a large pore volume of 4.21 cm g(-1) and a high specific surface area of 396.3 m(2) g(-1) has been reported by H2O2-precipitated boehmite from sodium aluminate solution, followed with azeotropic distillation and calcination. The boehmite nanofibres of crumpled sheet-like morphology about 5-10 nm thick and over 100 nm long were preserved after calcination. A mechanism of n-butanol-induced crumpled sheet-like boehinite nanofibres formation was proposed. This interaction between butoxy groups (CH3(CH2)(3)O-) and the surface of boehmite crystallites through hydrogen bonds induces profound changes in the morphology of boehmite particles and their growth. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：136 / 139

页数：4

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