Intramolecularly selective decomposition of surfactant molecules on photocatalytic oxidative degradation over TiO2 photocatalyst

Michitaka Ohtaki, Hirofumi Sato, Hiroyuki Fujii, Koichi Eguchi

    Research output: Contribution to journalArticle

    15 Citations (Scopus)

    Abstract

    Investigation on oxidative mineralization of various surfactants over TiO2 photocatalyst reveals an anomalously retarded degradation of the trimethylammonium moiety in cationic surfactants. Model reactions using tetraalkylammonium chlorides as substrates confirm that the stepwise behavior of the mineralization time courses is ascribed to intramolecularly selective decomposition caused by a considerably slow degradation rate of the methyl groups directly bound to the quaternary nitrogen. A strong inhibition effect of bromide or iodide anions preventing the complete mineralization is also revealed.

    Original languageEnglish
    Pages (from-to)121-129
    Number of pages9
    JournalJournal of Molecular Catalysis A: Chemical
    Volume155
    Issue number1-2
    DOIs
    Publication statusPublished - Apr 20 2000

    All Science Journal Classification (ASJC) codes

    • Catalysis
    • Process Chemistry and Technology
    • Physical and Theoretical Chemistry

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