Fe oxide nanoparticles/Ti-modified mesoporous silica as a photo-catalyst for efficient and selective cyclohexane conversion with O2 and solar light

Y. Ide, M. Iwata, Y. Yagenji, N. Tsunoji, M. Sohmiya, K. Komaguchi, T. Sano, Yoshiyuki Sugahara

    Research output: Contribution to journalArticle

    16 Citations (Scopus)

    Abstract

    We report a new, environmentally and economically friendly photocatalytic process with unprecedentedly high activity for partial cyclohexane oxidation. Mesoporous silicas containing isolated tetrahedrally coordinated Ti and Fe oxide nanoparticles immobilized on the pore surface were synthesized by reacting SBA-15 with Ti(iv) acetylacetonate and Fe(iii) acetylacetonate successively. A variety of characterizations suggested that the grafted tetrahedrally coordinated Ti species were coupled with Fe oxide nanoparticles via Ti-O-Fe bonds. The SBA-15 photocatalysts showed a high yield (up to sub-mmol) and nearly 100% selectivity for the production of cyclohexanol and cyclohexanone with molecular O2 under solar light. The unprecedentedly high activity could be explained by the lengthened lifetime of the active Ti species by electron delocalization over Ti-O-Fe bonds and the visible light (λ > 420 nm)-induced activity endowed by Fe oxide nanoparticles coupled to the Ti species.

    Original languageEnglish
    Pages (from-to)15829-15835
    Number of pages7
    JournalJournal of Materials Chemistry A
    Volume4
    Issue number41
    DOIs
    Publication statusPublished - 2016

    Fingerprint

    Cyclohexane
    Silicon Dioxide
    Oxides
    Silica
    Nanoparticles
    Catalysts
    Cyclohexanols
    Photocatalysts
    Oxidation
    Electrons
    SBA-15
    acetyl acetonate

    ASJC Scopus subject areas

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

    Cite this

    Fe oxide nanoparticles/Ti-modified mesoporous silica as a photo-catalyst for efficient and selective cyclohexane conversion with O2 and solar light. / Ide, Y.; Iwata, M.; Yagenji, Y.; Tsunoji, N.; Sohmiya, M.; Komaguchi, K.; Sano, T.; Sugahara, Yoshiyuki.

    In: Journal of Materials Chemistry A, Vol. 4, No. 41, 2016, p. 15829-15835.

    Research output: Contribution to journalArticle

    Ide, Y. ; Iwata, M. ; Yagenji, Y. ; Tsunoji, N. ; Sohmiya, M. ; Komaguchi, K. ; Sano, T. ; Sugahara, Yoshiyuki. / Fe oxide nanoparticles/Ti-modified mesoporous silica as a photo-catalyst for efficient and selective cyclohexane conversion with O2 and solar light. In: Journal of Materials Chemistry A. 2016 ; Vol. 4, No. 41. pp. 15829-15835.
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    abstract = "We report a new, environmentally and economically friendly photocatalytic process with unprecedentedly high activity for partial cyclohexane oxidation. Mesoporous silicas containing isolated tetrahedrally coordinated Ti and Fe oxide nanoparticles immobilized on the pore surface were synthesized by reacting SBA-15 with Ti(iv) acetylacetonate and Fe(iii) acetylacetonate successively. A variety of characterizations suggested that the grafted tetrahedrally coordinated Ti species were coupled with Fe oxide nanoparticles via Ti-O-Fe bonds. The SBA-15 photocatalysts showed a high yield (up to sub-mmol) and nearly 100{\%} selectivity for the production of cyclohexanol and cyclohexanone with molecular O2 under solar light. The unprecedentedly high activity could be explained by the lengthened lifetime of the active Ti species by electron delocalization over Ti-O-Fe bonds and the visible light (λ > 420 nm)-induced activity endowed by Fe oxide nanoparticles coupled to the Ti species.",
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    AU - Ide, Y.

    AU - Iwata, M.

    AU - Yagenji, Y.

    AU - Tsunoji, N.

    AU - Sohmiya, M.

    AU - Komaguchi, K.

    AU - Sano, T.

    AU - Sugahara, Yoshiyuki

    PY - 2016

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    N2 - We report a new, environmentally and economically friendly photocatalytic process with unprecedentedly high activity for partial cyclohexane oxidation. Mesoporous silicas containing isolated tetrahedrally coordinated Ti and Fe oxide nanoparticles immobilized on the pore surface were synthesized by reacting SBA-15 with Ti(iv) acetylacetonate and Fe(iii) acetylacetonate successively. A variety of characterizations suggested that the grafted tetrahedrally coordinated Ti species were coupled with Fe oxide nanoparticles via Ti-O-Fe bonds. The SBA-15 photocatalysts showed a high yield (up to sub-mmol) and nearly 100% selectivity for the production of cyclohexanol and cyclohexanone with molecular O2 under solar light. The unprecedentedly high activity could be explained by the lengthened lifetime of the active Ti species by electron delocalization over Ti-O-Fe bonds and the visible light (λ > 420 nm)-induced activity endowed by Fe oxide nanoparticles coupled to the Ti species.

    AB - We report a new, environmentally and economically friendly photocatalytic process with unprecedentedly high activity for partial cyclohexane oxidation. Mesoporous silicas containing isolated tetrahedrally coordinated Ti and Fe oxide nanoparticles immobilized on the pore surface were synthesized by reacting SBA-15 with Ti(iv) acetylacetonate and Fe(iii) acetylacetonate successively. A variety of characterizations suggested that the grafted tetrahedrally coordinated Ti species were coupled with Fe oxide nanoparticles via Ti-O-Fe bonds. The SBA-15 photocatalysts showed a high yield (up to sub-mmol) and nearly 100% selectivity for the production of cyclohexanol and cyclohexanone with molecular O2 under solar light. The unprecedentedly high activity could be explained by the lengthened lifetime of the active Ti species by electron delocalization over Ti-O-Fe bonds and the visible light (λ > 420 nm)-induced activity endowed by Fe oxide nanoparticles coupled to the Ti species.

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