TY - JOUR
T1 - Organic-functionalized sodalite nanocrystals and their dispersion in solvents
AU - Li, Dan
AU - Yao, Jianfeng
AU - Wang, Huanting
AU - Hao, Na
AU - Zhao, Dongyuan
AU - Ratinac, Kyle R.
AU - Ringer, Simon P.
PY - 2007/11/1
Y1 - 2007/11/1
N2 - Hydroxy-sodalite nanocrystals with organic functional groups (i.e., {double bond, long}Si-(CH3)(CH2)3NH2, denoted Sod-N, or {triple bond, long}Si-CH3, denoted Sod-C) were synthesized by the direct transformation of organic-functionalized silicalite nanocrystals. The chemical structure of organic-functionalized sodalite nanocrystals was confirmed by 29Si MAS NMR spectroscopy. Gas sorption results showed that the sodalite nanocrystals contained uniform pore channels that were accessible to hydrogen, but inaccessible to nitrogen, as expected. The BET surface areas are calculated to be 22.8, 19.6 and 19.1 m2/g for plain sodalite nanocrystals (Sod), Sod-N, and Sod-C, respectively; similarly, Sod-N and Sod-C exhibited slightly lower hydrogen adsorption than Sod. The dispersion of Sod-N and Sod-C in organic solvents was favored by the presence of organic functional groups. Therefore, the organic-functionalized sodalite nanocrystals prepared in this work may be very useful for fabricating zeolite nanostructures and sodalite-polymer nanocomposite membranes.
AB - Hydroxy-sodalite nanocrystals with organic functional groups (i.e., {double bond, long}Si-(CH3)(CH2)3NH2, denoted Sod-N, or {triple bond, long}Si-CH3, denoted Sod-C) were synthesized by the direct transformation of organic-functionalized silicalite nanocrystals. The chemical structure of organic-functionalized sodalite nanocrystals was confirmed by 29Si MAS NMR spectroscopy. Gas sorption results showed that the sodalite nanocrystals contained uniform pore channels that were accessible to hydrogen, but inaccessible to nitrogen, as expected. The BET surface areas are calculated to be 22.8, 19.6 and 19.1 m2/g for plain sodalite nanocrystals (Sod), Sod-N, and Sod-C, respectively; similarly, Sod-N and Sod-C exhibited slightly lower hydrogen adsorption than Sod. The dispersion of Sod-N and Sod-C in organic solvents was favored by the presence of organic functional groups. Therefore, the organic-functionalized sodalite nanocrystals prepared in this work may be very useful for fabricating zeolite nanostructures and sodalite-polymer nanocomposite membranes.
UR - http://www.scopus.com/inward/record.url?scp=35349024246&partnerID=8YFLogxK
U2 - 10.1016/j.micromeso.2007.03.006
DO - 10.1016/j.micromeso.2007.03.006
M3 - Article
AN - SCOPUS:35349024246
VL - 106
SP - 262
EP - 267
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
SN - 1387-1811
IS - 1-3
ER -