Synthesis of γ-Al2O3 nanoparticles by chemical precipitation method |
| |
基金项目: | Foundation item: Project(03JJY3015) supported by the Natural Science Foundation of Hunan Province |
| |
摘 要: |
|
关 键 词: | 纳米粒子 纳米材料 合成方法 晶体结构 |
文章编号: | 1005-9784(2005)05-0536-06 |
收稿时间: | 2004-11-14 |
修稿时间: | 2005-01-20 |
Synthesis of γ-Al2O3 nanoparticles by chemical precipitation method |
| |
Authors: | Song Xiao-lan Qu Peng Yang Hai-pin He Xi and Qiu Guan-zhou |
| |
Affiliation: | (1) School of Resources Processing and Bioengineering, Central South University, 410083 Changsha, China |
| |
Abstract: | Highly pure active γ-Al2O3 nanoparticles were synthesized from aluminum nitrate and ammonium carbonate with a little surfactant by chemical precipitation
method. The factors affecting the synthesis process were studied. The properties of γ-Al2O3 nanoparticles were characterized by DTA, XRD, BET, TEM, laser granularity analysis and impurity content analysis. The results
show that the amorphous precursor Al(OH)3 sols are produced by using 0.1 mol/L Al(NO3)3 · 9H2O and 0.16 mol/L (NH4)2CO3 · H2O reaction solutions, according to the volume ratio 1.33, adding 0.024% (volume fraction) surfactant PEG600, and reacting
at 40 °C, 1 000 r/min stirring rate for 15 min. Then, after stabilizing for 24 h, the precursors were extracted and filtrated
by vacuum, washed thoroughly with deionized water and dehydrated ethanol, dried in vacuum at 80°C for 8 h, final calcined
at 800 °C for 1 h in the air, and high purity active γ-Al2O3 nanoparticles can be prepared with cubic in crystal system, O
H
7
-FD3M in space group, about 9 nm in crystal grain size, about 20 nm in particle size and uniform size distribution, 131. 35
m2/g in BET specific surface area, 7 – 11 nm in pore diameter, and not lower than 99.93% in purity.
Foundation item: Project(03JJY3015) supported by the Natural Science Foundation of Hunan Province |
| |
Keywords: | chemical precipitation method γ -Al2O3 nanoparticles characterization of properties |
本文献已被 SpringerLink 等数据库收录! |
|