TY - JOUR
T1 - Doped microporous hybrid silica membranes for gas separation
AU - Qureshi, Hammad F.
AU - Besselink, Rogier
AU - ten Elshof, Johan E.
AU - Nijmeijer, Arian
AU - Winnubst, Louis
N1 - Funding Information:
This research was supported by Netherlands Technology Foundation (STW). We are grateful to Mark Smithers (Laboratory for Materials Characterization at the MESA+ Institute for Nanotechnology) for capturing high-resolution SEM images.
Publisher Copyright:
© 2015, The Author(s).
PY - 2015/7/26
Y1 - 2015/7/26
N2 - Hybrid silica (i.e., bis-triethoxysilylethane: BTESE) membranes doped with B, Ta or Nb were made through a sol–gel process. Triethyl borate, tantalum (V) ethoxide (TPE) and niobium (V) ethoxide (NPE) were selected as doping precursors. The doping concentration was optimized to produce sols, suitable for membrane fabrication. Thermal stability, structural analysis, cross-sectional micrographs and single gas permeation experiments were performed on these membranes, and results are compared with an undoped BTESE membrane. It was observed that the synthesized doped BTESE materials and membranes resulted into a more open (and, in one occurrence, SF6 permeable) pore microstructure, showing high permeances of larger gas molecules, while having a cross-sectional thickness comparable to undoped BTESE membranes. Graphical Abstract: [Figure not available: see fulltext.][Figure not available: see fulltext.][Figure not available: see fulltext.]
AB - Hybrid silica (i.e., bis-triethoxysilylethane: BTESE) membranes doped with B, Ta or Nb were made through a sol–gel process. Triethyl borate, tantalum (V) ethoxide (TPE) and niobium (V) ethoxide (NPE) were selected as doping precursors. The doping concentration was optimized to produce sols, suitable for membrane fabrication. Thermal stability, structural analysis, cross-sectional micrographs and single gas permeation experiments were performed on these membranes, and results are compared with an undoped BTESE membrane. It was observed that the synthesized doped BTESE materials and membranes resulted into a more open (and, in one occurrence, SF6 permeable) pore microstructure, showing high permeances of larger gas molecules, while having a cross-sectional thickness comparable to undoped BTESE membranes. Graphical Abstract: [Figure not available: see fulltext.][Figure not available: see fulltext.][Figure not available: see fulltext.]
KW - Gas separation
KW - Hybrid silica
KW - Metal doping
KW - Microporous membranes
KW - Sol–gel synthesis
UR - http://www.scopus.com/inward/record.url?scp=84929835954&partnerID=8YFLogxK
U2 - 10.1007/s10971-015-3687-3
DO - 10.1007/s10971-015-3687-3
M3 - Article
SN - 0928-0707
VL - 75
SP - 180
EP - 188
JO - Journal of sol-gel science and technology
JF - Journal of sol-gel science and technology
IS - 1
ER -