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In Situ ATR-FTIR Investigation of Photodegradation of 3,4-Dihydroxybenzoic Acid on TiO2

Published inCatalysis letters, vol. 146, no. 11, p. 2215-2220
Publication date2016
Abstract

The catalytic photo-oxidation of 3,4-dihydroxybenzoic acid on TiO2 has been studied by in situ ATR-FTIR in flowing water and in flowing wet air/nitrogen gas. In flowing water it was difficult to observe photodegradation intermediates despite photocatalytic action during UV illumination. In the flowing wet air/nitrogen system carboxylic acids and carbonates were observed. It was shown that water plays an important role in the formation of oxidation active species. Oxygen shows a prominent role for carboxylic acid degradation, but the photogenerated hole plays the important role for the 3,4-dihydroxybenzoic acid ring cleavage.

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Citation (ISO format)
HU, Xuefeng, BUERGI, Thomas. In Situ ATR-FTIR Investigation of Photodegradation of 3,4-Dihydroxybenzoic Acid on TiO<sub>2</sub>. In: Catalysis letters, 2016, vol. 146, n° 11, p. 2215–2220. doi: 10.1007/s10562-016-1838-y
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ISSN of the journal1011-372X
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