New Generation of Mesoporous Silica Membranes Prepared by a Stöber-Solution Pore-Growth Approach

Marie-Alix Pizzoccaro*, Cindy Huiskes, Enrico G. Keim, Soraya Nicole Sluitjer, Henk M. van Veen, Arian Nijmeijer, Louis Winnubst, M.W.J. Luiten-Olieman

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)

Abstract

Membranes consisting of uniform and vertically organized mesopores are promising systems for molecular filtration because of the possibility to combine high-flux and high-rejection properties. In this work, a new generation of mesoporous silica membranes (MSMs) have been developed, in which an organized mesoporous layer is directly formed on top of a porous ceramic support via a Stöber-solution pore-growth approach. Relevant characterization methods have been used to demonstrate the growth of the membrane separation layer and the effect of reaction time and the concentration of the reactants on the microstructure of the membrane. Compared to previous studies using the evaporation-induced self-assembly method to prepare MSMs, an important increase in water permeability was observed (from 1.0 to at least 3.8 L m -2 h -1 bar -1), indicating an improved pore alignment. The water permeability, cyclohexane permporometry tests, and molecular cut-off measurements (MWCO ≈ 2300 Da) were consistent with membranes composed of 2-3 nm accessible pores.

Original languageEnglish
Pages (from-to)18528-18539
Number of pages12
JournalACS Applied Materials and Interfaces
Volume11
Issue number20
Early online date30 Apr 2019
DOIs
Publication statusPublished - 22 May 2019

Keywords

  • Stöber sol
  • accessible pores
  • mesoporous silica membranes
  • molecular separation
  • porous ceramic support
  • ultrathin membrane
  • Stober sol

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