Journal
APPLIED SURFACE SCIENCE
Volume 258, Issue 15, Pages 5712-5715Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2012.02.067
Keywords
alpha-Al2O3; Nanoparticles; Monodisperse; Porous
Categories
Funding
- National Natural Science Foundation of China [51102022]
- China Postdoctoral Science Foundation [2011M501426]
- Specialized Research Fund for the Doctoral Program of Higher Education [20110205120001]
- Special Fund for Basic Scientific Research of Central Colleges, Chang'an University [CHD2012ZD015, CHD2011JC134]
- Chang'an University
Ask authors/readers for more resources
Monodisperse porous alpha-Al2O3 nanoparticles with variable sizes were prepared by the homogeneous precipitation method and subsequent heat-treatments. The crystalline phases, morphologies and pore size distributions of the samples were characterized using X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), and N-2 adsorption/desorption. The diameters of porous alpha-Al2O3 nanoparticles obtained with an Al3+ concentration of 10 mmol/L were in the range of 200-500 nm, and the diameters of porous alpha-Al2O3 nanoparticles obtained with an Al3+ concentration of 0.5 mmol/L were in the range of 40-70 nm. The pore sizes of porous alpha-Al2O3 nanoparticles were approximately 6-14 nm. The porosity developed during the heating process due to phase transformation and shrinkage of precursor particles. The monodisperse porous alpha-Al2O3 nanoparticles have great potential to be applied in gas separation, catalyst supports and filters in a high temperature environment. (C) 2012 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available