Synthesis of nano-sized mesoporous silicas with metal incorporation

Man Chien Chao, Hong Ping Lin, Chung Yuan Mou, Bo Wen Cheng, Chi Feng Cheng

Research output: Contribution to journalArticle

74 Citations (Scopus)

Abstract

The metal oxide-incorporated or -grafted mesoporous silica nanoparticles and nanotubes have been prepared efficiently via a two-step synthetic process, which includes a pre-hydrolysis of the TEOS and metal alkoxides or salts in acidic solution (pH < 1.0), and fast co-condensation of silica, metal oxides and surfactant in alkaline ammonia solution (pH 8.0-9.0). Because the presence of the cationic surfactant and a proper pH range could make the silica condensation fast enough to match a relatively quick metal-oxide condensation, various metal oxides (e.g. Al-, Ti-, V-, Zr-, Fe-oxides) can be homogeneously incorporated into the silica framework or grafted on the silica surface. The XRD, reflectance UV-vis and FT-IR spectrometry and solid state NMR have been performed to further identify the successful incorporation and grafting of metal oxides. The metal oxides-incorporated mesoporous silica nanotubes or nanoparticles with high surface area, large mesoporosity and textural porosity can be considered as a capable catalyst of high connectivity and accessibility. The Al-incorporated mesoporous silica nanoparticles show higher catalytic activity toward the cumene-cracking reaction than the typical mesoporous aluminosilicate.

Original languageEnglish
Pages (from-to)81-87
Number of pages7
JournalCatalysis Today
Volume97
Issue number1 SPEC. ISS.
DOIs
Publication statusPublished - 2004 Jan 1

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

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