Direct observation of bimodal amphiphilic surface structures of zeolite particles for a novel liquid-liquid phase boundary catalysis

Shigeru Ikeda, Hadi Nur, Tetsuro Sawadaishi, Kuniharu Ijiro, Masatsugu Shimomura, Bunsho Ohtani

    Research output: Contribution to journalArticlepeer-review

    41 Citations (Scopus)

    Abstract

    Amphiphilic NaY zeolite particles were prepared by a partial modification of the external surface of NaY with alkylsilyl groups. When the particles were added to a mixture of aqueous hydrogen peroxide and normal alkene, they were feasibly located just at the liquid-liquid phase boundary and efficiently catalyzed epoxidation of the alkenes even without stirring. Fluorescence microscopic observation of these particles selectively modified with fluorescent dye revealed that each particle has a bimodal amphiphilic surface structure; one side of the external surface is hydrophilic and the other is hydrophobic.

    Original languageEnglish
    Pages (from-to)7976-7979
    Number of pages4
    JournalLangmuir
    Volume17
    Issue number26
    DOIs
    Publication statusPublished - 2001 Dec 25

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Surfaces and Interfaces
    • Spectroscopy
    • Electrochemistry

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