Bonding geometry and reactivity of methoxy and ethoxy groups adsorbed on powdered TiO2
Article Abstract:
Thermo- and photoreactivities of methoxy (CH3O(a)) and ethoxy groups (C2H5O(a)) bonded, via the oxygen atom, to one Ti ion (monodentate adsorption form) or to two Ti ions (bidentate adsorption form) on TiO2 are studied by Fourier transformed infrared spectroscopy. It is observed that monodentate form has similar thermal stability to bidentate one, however, in the photooxidation in the presence of O2, the decomposition rate of monodentate form is ~1.5 times that of the bidentate form.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2000
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Photooxidation of formic acid vs formate and ethanol vs ethoxy on TiO2 and effect of adsorbed water on the rates of formate and formic acid photooxidation
Article Abstract:
Comparison of photooxidation rates of formic acid and formate on TiO2 as well as the effect of adsorbed water on formate and formic acid photodecomposition rates are investigated by Fourier transformed infrared spectroscopy. The result reveals that ethanol is important for the formation of acetaldehyde, while ethoxy groups are photooxidized to adsorbed acetate, formate, and water.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2001
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Crotonaldehyde formation from decomposition of IC[H.sub.2]C[H.sub.2]OH on powdered Ti[O.sub.2]
Article Abstract:
A study was conducted on adsorption and reactions of 2-iodoethanol on Ti[O.sub.2] by Fourier transform infrared spectroscopy. IC[H.sub.2]C[H.sub.2]OH decomposes on Ti[O.sub.2] to form crotonaldehyde, which is proposed to result from condensation of two acetaldehyde, accompanied by the increase of hydrogen-bonded surface hydroxy groups.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2006
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