Catalysis Letters

, Volume 146, Issue 11, pp 2215–2220 | Cite as

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

  • Xuefeng Hu
  • Thomas Bürgi


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.

Graphical Abstract


In situ spectroscopy Photocatalysis Attenuated total reflection TiO2 3,4-dihydroxybenzoic acid 



The generous financial support by the National Science Foundation of China (nos. 41076040 and 41230858) is gratefully acknowledged.


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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantaiPeople’s Republic of China
  2. 2.Département de Chimie PhysiqueUniversité de GenèveGenève 4Switzerland

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