The Heterogeneous Photocatalytic Decomposition of Benzoic Acid and Adipic Acid on Platinized TiO2 Powder. The Photo-Kolbe Decarboxylative Route to the Breakdown of the Benzene Ring and to the Production to Butane.
TEXAS UNIV AT AUSTIN DEPT OF CHEMISTRY
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The heterogeneous photocatalytic decomposition of adipic acid in deaerated aqueous solutions containing a suspension of platinized TiO2 anatase powder leads to the formation of CO2 and butane with lesser amounts of valeric acid and negligibly small quantities of oligomeric materials. A mechanism for this photo-Kolbe reaction, which yields different products than the electrochemical Kolbe reaction, is proposed. The photodecomposition of benzoic acid in oxygen-containing solution at platinized TiO2 was also investigated. The reaction product is predominantly CO2, with intermediate production of salicylic acid and phenol. A mechanism for the reaction based on photogeneration of hydroxyl radicals and adsorption of intermediates on the powder surface is proposed. Author
- Physical Chemistry