A novel route for preparation of Ti-containing mesoporous silica with high catalytic performance by using a molecular precursor tetrakis(tris-tert- butoxysiloxy)titanium

Kwang Min Choi, Toshiyuki Yokoi, Takashi Tatsumi, Kazuyuki Kuroda

    Research output: Contribution to journalArticle

    20 Citations (Scopus)

    Abstract

    Mesoporous silica containing isolated Ti with variable Si/Ti ratios was prepared by pyrolysis of a mixture of tetrakis(tris-tert-butoxysiloxy)titanium (TS4) and tetraethoxysilane (TEOS) through a hard template method. TEOS plays two roles as a silica source and solvent. TS4 works as a catalyst for the hydrolysis of TEOS. Titanium species are found to be isolated in the silica frameworks, supported by DR-UV-vis, FT-IR, ESR, and XPS. The mesoporous structure was verified by XRD, N2 adsorption, and SEM. The results of the catalytic performance for the oxidation reaction of cyclohexene using tert-butoxy hydrogen peroxide (TBHP) as oxidant show that high conversion (29%) of cyclohexene and selectivity (98%) of cyclohexene oxide are realized for the Ti-containing mesoporous silica with Si/Ti ratios of 28 and 51.

    Original languageEnglish
    Pages (from-to)2485-2494
    Number of pages10
    JournalJournal of Materials Chemistry A
    Volume1
    Issue number7
    DOIs
    Publication statusPublished - 2013 Feb 21

    Fingerprint

    Titanium
    Silicon Dioxide
    Silica
    Polymers
    Oxidants
    Hydrogen peroxide
    Hydrogen Peroxide
    Paramagnetic resonance
    Hydrolysis
    Pyrolysis
    X ray photoelectron spectroscopy
    Adsorption
    Oxidation
    Scanning electron microscopy
    Catalysts
    Oxides
    tetraethoxysilane
    cyclohexene

    ASJC Scopus subject areas

    • Chemistry(all)
    • Renewable Energy, Sustainability and the Environment
    • Materials Science(all)

    Cite this

    A novel route for preparation of Ti-containing mesoporous silica with high catalytic performance by using a molecular precursor tetrakis(tris-tert- butoxysiloxy)titanium. / Choi, Kwang Min; Yokoi, Toshiyuki; Tatsumi, Takashi; Kuroda, Kazuyuki.

    In: Journal of Materials Chemistry A, Vol. 1, No. 7, 21.02.2013, p. 2485-2494.

    Research output: Contribution to journalArticle

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    abstract = "Mesoporous silica containing isolated Ti with variable Si/Ti ratios was prepared by pyrolysis of a mixture of tetrakis(tris-tert-butoxysiloxy)titanium (TS4) and tetraethoxysilane (TEOS) through a hard template method. TEOS plays two roles as a silica source and solvent. TS4 works as a catalyst for the hydrolysis of TEOS. Titanium species are found to be isolated in the silica frameworks, supported by DR-UV-vis, FT-IR, ESR, and XPS. The mesoporous structure was verified by XRD, N2 adsorption, and SEM. The results of the catalytic performance for the oxidation reaction of cyclohexene using tert-butoxy hydrogen peroxide (TBHP) as oxidant show that high conversion (29{\%}) of cyclohexene and selectivity (98{\%}) of cyclohexene oxide are realized for the Ti-containing mesoporous silica with Si/Ti ratios of 28 and 51.",
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    AU - Tatsumi, Takashi

    AU - Kuroda, Kazuyuki

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