Towards mesoporous Keggin-type polyoxometalates –systematic study on organic template removal

T. Lunkenbein, M.M.G. Kamperman, M. Schieder, S. With, Z. Li, H. Sai, S. Forster, U. Wiesner, J. Breu

Research output: Contribution to journalArticleAcademicpeer-review

8 Citations (Scopus)

Abstract

Here, we present systematic studies on the removal of the polymer template from inverse hexagonally ordered poly(butadiene-block-2-dimethylaminoethyl methacrylate)–phosphomolybdic acid (H3PMo12O40) nanocomposites. Highly ordered mesophases are obtained via an evaporation-induced self-assembly process. Different techniques are used to remove the organic template: direct calcination in air, a two-step heat treatment ((1) argon atmosphere and (2) oxidative atmosphere), and a combination of heat and plasma treatment. Our studies show that direct calcination in air and two-step heat treatment lead to a collapse of mesostructure before complete carbon removal is accomplished. In contrast, plasma etching of heat treated ultra-microtomed samples results in hexagonally ordered porous nanofilms
Original languageEnglish
Pages (from-to)6238-6248
JournalJournal of Materials Chemistry. A, Materials for energy and sustainability
Volume1
DOIs
Publication statusPublished - 2013

Keywords

  • transition-metal oxides
  • catalytic-properties
  • building-blocks
  • acid catalysts
  • silica
  • molybdenum
  • mesostructures
  • nanocomposite
  • architectures
  • tungsten

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