Fabrication and Characterization of Nanoporous Carbon/Silica Membranes


  • The authors acknowledge the financial support of The Carbon Dioxide Reduction & Sequestration Center, one of the 21st Century Frontier R&D Programs funded by the Ministry of Science and Technology of Korea, and The Korea Institute of Science and Technology for Evaluation and Planning under the National Research Laboratory Program.


original image

Nanoporous carbon/silica (C/SiO2) membranes (see Figure) with high permeabilities and high gas selectivities are prepared by the controlled pyrolysis of polyimide/silica (PI/SiO2) composites obtained from polymerization of alkoxysilanes in situ via a sol–gel reaction. The silica content and the nature of the silica network incorporated in the carbon matrix can be used to tune the gas permeation and separation properties of the final C/SiO2 membranes.