Title: Ultralow temperature synthesis of ordered hexagonal smaller supermicroporous silica using semifluorinated surfactants as template
Authors: Di, Yan ×
Meng, XJ
Wang, LF
Li, SG
Xiao, FS #
Issue Date: Mar-2006
Publisher: Amer chemical soc
Series Title: Langmuir vol:22 issue:7 pages:3068-3072
Abstract: Ordered hexagonal smaller supermicroporous silica (JLU-14(L) and JLU-11(L)) has been successfully synthesized at ultralow temperature (0 similar to -20 degrees C) by semifluorinated surfactants, which is extensively investigated by X-ray diffraction, N-2 adsorption, and transmission electron microscopy. X-ray diffraction shows that the peak intensity of the samples increases with decreasing synthesis temperatures in the range of 0 similar to -20 degrees C, indicating that the ordering of porous silica improves with decreasing synthesis temperature. N-2 adsorption/desorption isotherms show that JLU-14L has both ordered smaller hexagonal supermicropores (1.27 and 1.28 nm) and disordered micropores (0.67 nm). Such hierarchically porous materials with micro/supermicroporosity should be potentially important for fast diffusion of reactants and products in catalytic reactions. The ultralow temperature synthesis is a crucial factor for the formation of ordered smaller supermicropores and the control of microporosity in JLU-14(L).
ISSN: 0743-7463
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Centre for Surface Chemistry and Catalysis
× corresponding author
# (joint) last author

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