Rational design of defect-free carbon-silica-zirconia ceramic membrane derived from crosslinked organic structure for highly efficient gas separation

Journal of Membrane Science Volume 709 Page 123112- published_at 2024-07-19
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Title ( eng )
Rational design of defect-free carbon-silica-zirconia ceramic membrane derived from crosslinked organic structure for highly efficient gas separation
Creator
Niu Xinpu
Source Title
Journal of Membrane Science
Volume 709
Start Page 123112
Abstract
Carbon-SiO2-ZrO2 ceramic membranes, fabricated via in-situ carbon deposition through the calcination of organic chelating ligands (OCLs), hold great promise for use in energy-efficient gas separation process. However, fabricating a defect-free membrane poses a significant challenge. In this study, we propose a facile one-pot sol-gel combining aldimine condensation strategy to design homogeneous carbon-SiO2-ZrO2 ceramic membranes using 3-aminopropyltriethoxysilyl (APTES), zirconium (IV) tert-butoxide (ZrTB), and glyoxylic acid (GA) as precursors. The aldehyde-amine condensation between APTES and GA resulted in a crosslinked organic structure, enhancing the porosity of the membrane. The increased rigidity and orderliness reduced the migration of crosslinked organic components at elevated temperatures, leading to a uniform distribution of free carbon derived from pyrolysis. This method effectively suppresses the defect formation, thereby significantly improving the stability and separation performance of the obtained membranes. Owing to the high pore volume and uniform pore size distribution, APTES-ZrTB-GA calcined at 550 °C demonstrated a remarkable H2 permeance of 4.1 × 10−7 mol m−2 s−1 Pa−1, together with outstanding H2/CO2, H2/N2 and H2/CH4 selectivities of 13, 100 and 120, respectively. This study is expected to provide guidance for the design of defect-free carbon-SiO2-ZrO2 ceramic membranes toward more challenging separation processes.
Keywords
Carbon-silica-zirconia ceramic membranes
Sol-gel process
Aldimine condensation
Gas separation
Descriptions
Xinpu Niu sincerely acknowledges the financial support from the China Scholarship Council (CSC, No. 202307040023).
Language
eng
Resource Type journal article
Publisher
Elsevier
Date of Issued 2024-07-19
Rights
© 2024. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
This is not the published version. Please cite only the published version.
この論文は出版社版ではありません。引用の際には出版社版をご確認、ご利用ください。
Publish Type Accepted Manuscript
Access Rights embargoed access
Source Identifier
[DOI] https://doi.org/10.1016/j.memsci.2024.123112 isVersionOf
Remark The full-text file will be made open to the public on 19 July 2026 in accordance with publisher's 'Terms and Conditions for Self-Archiving'