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Interaction of hydrogen chloride and water with oxide surfaces. III - Titanium dioxideThe adsorption of hydrogen chloride and water vapors on five TiO2 powders in both the anatase and rutile crystalline forms was studied as a function of temperature, pressure, and outgas conditions. The adsorbents were characterized utilizing X-ray powder diffraction, scanning electron microscopy, surface area analysis, indicator method, microelectrophoresis, XPS, and infrared spectroscopy. It was found that both outgas temperature and adsorption temperature influenced the adsorption of water vapor on TiO2, while water vapor adsorption on TiO2 was completely reversible. It is argued that the number of hydroxyl groups present on the surface determines the adsorption capacity of water on the different titanium dioxides. It was found that heats of immersion in water were affected significantly by outgas temperature. Hydrogen chloride adsorption isotherms at 30 C measured on TiO2 after outgassing at 100-400 C showed that a part of the total HCl adsorbed was irreversibly adsorbed. The highest HCl adsorption capacity per unit area was exhibited by anatase, while pure rutile exhibited the lowest adsorption capacity.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Siriwardane, R. V.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Wightman, J. P.
(Virginia Polytechnic Institute and State University Blacksburg, VA, United States)
Date Acquired
August 11, 2013
Publication Date
August 1, 1983
Publication Information
Publication: Journal of Colloid and Interface Science
Volume: 94
ISSN: 0021-9797
Subject Category
Inorganic And Physical Chemistry
Accession Number
Funding Number(s)
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