Well-ordered mesoporous silica prepared by cationic fluorinated surfactant templating

Stephen E. Rankin, Bing Tan, Hans Joachim Lehmler, Kimberly P. Hindman, Barbara L. Knutson

Research output: Contribution to journalArticlepeer-review

47 Scopus citations

Abstract

We describe the synthesis and characterization of ordered mesoporous silica using the template 1H,1H,2H,2H-perfluorooctylpyridinium chloride. This surfactant forms several lyotropic mesophases at room temperature, including hexagonal close packed cylinders, an isotropic liquid crystal, and a lamellar phase. Using this surfactant, mesoporous silica is synthesized by room temperature precipitation and surfactant extraction. Both the surfactant and product material are thoroughly characterized. From nitrogen adsorption, the product has a specific surface area of 982 m2/g and a pore diameter of 2.6 nm. X-ray diffraction and transmission electron microscopy confirm two-dimensional close-packed hexagonal long-range ordering. This is the first example of cationic fluorinated surfactant templating of an ordered porous ceramic material.

Original languageEnglish
Pages (from-to)197-202
Number of pages6
JournalMicroporous and Mesoporous Materials
Volume73
Issue number3
DOIs
StatePublished - Sep 6 2004

Bibliographical note

Funding Information:
We thank Prof. Elizabeth Dickey and Ms. Colleen Frazer of Pennsylvania State University for helpful discussions of the characterization. We thank Dr. Alan Dozier of the University of Kentucky Materials Characterization Facility for his help with the TEM. We thank Prof. Kimberly Anderson of the University of Kentucky and her group for helping with the use of the optical microscope. This material in based upon work supported by the National Science Foundation under Grant No. DMR-0210517. BT was supported by a Kentucky Research Challenge Trust Fund graduate fellowship.

Keywords

  • Fluorinated
  • Mesoporous
  • Silica
  • Surfactant templating

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials

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