DocumentCode :
1252253
Title :
Room temperature ionic liquid-assisted synthesis of mesoporous γ-alumina
Author :
Zhi Liu ; Jun Hua Mi ; Yuan Yang ; Jia Li ; Xiu Li Tan
Author_Institution :
Fac. of Chem. & Chem. Eng., Inst. of Chem. for Functionalized Mater., Liaoning Normal Univ., Dalian, China
Volume :
7
Issue :
7
fYear :
2012
fDate :
7/1/2012 12:00:00 AM
Firstpage :
617
Lastpage :
620
Abstract :
In this Letter, mesoporous γ-aluminas have been successfully synthesised by calcining self-synthesised alumina sol in the presence of room temperature ionic liquid, 1-butyl-3-methylimidazolium tetrafluoroborate. N2-adsorption measurements presented that the ionic liquid had a significant influence on the textural structure of the final product. Aluminas prepared in this way displayed very rich porosities with large mesopores. As the ionic liquid concentration (IL/Al molar ratio) increased successively from 0 to 0.10, the products showed much larger pore volumes (0.30-1.26-cm3/g) and higher specific surface areas (247-339-m2/g). X-ray diffraction patterns and 27Al magic-angle spinning nuclear magnetic resonance spectra revealed that the self-synthesised alumina sol first transformed into boehmite phase and then became well-crystallised γ-alumina particles by calcining at 500°C.
Keywords :
X-ray diffraction; adsorption; alumina; calcination; crystallisation; magic angle spinning; mesoporous materials; nuclear magnetic resonance; organic compounds; porosity; sols; surface texture; 1-butyl-3-methylimidazolium tetrafluoroborate; 27Al magic-angle spinning nuclear magnetic resonance spectra; Al2O3; IL-Al molar ratio; N2-adsorption measurements; X-ray diffraction; boehmite phase; calcining self-synthesised alumina sols; ionic liquid concentration; ionic liquid-assisted synthesis; mesoporous γ-alumina preparation; pore volumes; rich porosities; temperature 293 K to 298 K; temperature 500 degC; textural structure; well-crystallised γ-alumina particles;
fLanguage :
English
Journal_Title :
Micro & Nano Letters, IET
Publisher :
iet
ISSN :
1750-0443
Type :
jour
DOI :
10.1049/mnl.2012.0272
Filename :
6250091
Link To Document :
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