Sulphated Oxides of Titanium Prepared from Titanium Ethoxide: Surface and Related Properties

Titanium oxides, with moderately high surface areas exhibiting a mixed mesoporous/microporous texture, were prepared from titanium ethoxide. The porosity seemed to stem from the loss of volatile components from the inner coordination sphere of the titanium ions. After impregnation with sulphate grou...

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Bibliographic Details
Published inAdsorption science & technology Vol. 26; no. 10; pp. 803 - 813
Main Authors Ramadan, Adham R., Yacoub, Nahed, Amin, Haguer, Ragai, Jehane
Format Journal Article
LanguageEnglish
Published London, England SAGE Publications 01.12.2008
Subjects
Oxides
Porosity
Sulfates
Surface area
Surface chemistry
Surface layer
Texture
Titanium ethoxide
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Summary:Titanium oxides, with moderately high surface areas exhibiting a mixed mesoporous/microporous texture, were prepared from titanium ethoxide. The porosity seemed to stem from the loss of volatile components from the inner coordination sphere of the titanium ions. After impregnation with sulphate groups, a general decrease in surface area was observed. This decrease was more drastic at higher temperatures when the sulphate ions are in a bidentate state of ligation. A high sulphate concentration led to a distinctive decrease in the total pore volume and to the loss of the microporous texture. Micropore blocking appeared to be due to the presence of the bidentate sulphate groups. The latter are responsible for the higher surface acidities displayed by the sulphated oxides.
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ISSN:0263-6174
2048-4038
DOI:10.1260/026361708788708243