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The fluorination of titanium dioxide surfaces

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  • Colloid Science
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Summary

Gaseous hydrogen fluoride gave a bulk attack on titanium dioxide but dilute aqueous hydrofluoric acid gave a partial surface fluorination. A specific fluoride for chloride exchange reaction occurs on chloride containing titanium dioxide surfaces. A weak and a strong form of fluoride adsorption may be distinguished, the former being removed by prolonged treatment with water, the latter requiring steam at 1020 K for its complete removal. Some infra-red, electrophoretic and acidity studies on various fluorinated surfaces are reported.

Zusammenfassung

Eine verdünnte wäßrige Fluorwasserstoffsäure fluoriert Titandioxid teilweise an der Oberfläche, während Fluorwasserstoffgas auch das Kristallinnere angreift. Eine spezifische Austauschreaktion Fluorid gegen Chlorid tritt an chloridhaltigen Titandioxidoberflächen auf. Man kann zwischen einer schwachen und einer starken Fluoridadsorption unterscheiden. Die schwächer adsorbierten Fluoridionen werden durch längere Behandlung mit Wasser verdrängt, die stärker adsorbierten dagegen nur durch Dampf bei 1020 K. In der Arbeit wird außerdem über IR-Studien sowie über elektrophoretische Messungen und Aziditätsuntersuchungen an verschiedenen fluorierten Oberflächen berichtet.

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Authors and Affiliations

  1. Chemistry Department, Teesside Polytechnic, Middleshrough, Cleveland, England

    J. H. Moss, G. D. Parfitt & A. Fright

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  1. J. H. Moss
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  2. G. D. Parfitt
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  3. A. Fright
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Moss, J.H., Parfitt, G.D. & Fright, A. The fluorination of titanium dioxide surfaces. Colloid & Polymer Sci 256, 1121–1130 (1978). https://doi.org/10.1007/BF01638305

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  • DOI: https://doi.org/10.1007/BF01638305

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