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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 372 (1970), S. 308-313 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On reaction of anatase of high surface area with NaF solutions, OH groups of the TiO2 surface were replaced by F-. Only half the surface OH groups were exchanged in unbuffered solutions or at a pH at or slightly above the zero point of charge (pH 6.6). These are the OH groups exhibiting basic character. The remaining OH groups of acidic character exchange H+ for Na+ concurrently. They too, are replaced by fluorine in more acidic solutions (pH 4.6).
    Notes: Feinteiliger Anatas wurde mit NaF-Lösungen umgesetzt. Dabei werden OH-Gruppen der TiO2-Oberfläche durch F- ersetzt. In ungepufferter Lösung oder bei pH-Werten am oder wenig über dem isoelektrischen Punkt (pH 6,6) wird nur die Hälfte der vorhandenen OH-Gruppen. Zugleich tauschen die übrigen, sauren OH-Gruppen H+ -Ionen gegen Na+ aus. In stärker saurem Milieu (pH 4,6) werden auch die sauren OH-Gruppen durch Fluor ersetzt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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