Direct observation of reactive trapped holes in TiO2 undergoing photocatalytic oxidation of adsorbed alcohols: evaluation of the reaction rates and yields

Yoshiaki Tamaki; Akihiro Furube; Miki Murai; Kohjiro Hara; Ryuzi Katoh; M Tachiya

doi:10.1021/ja055866p

Direct observation of reactive trapped holes in TiO2 undergoing photocatalytic oxidation of adsorbed alcohols: evaluation of the reaction rates and yields

J Am Chem Soc. 2006 Jan 18;128(2):416-7. doi: 10.1021/ja055866p.

Authors

Yoshiaki Tamaki¹, Akihiro Furube, Miki Murai, Kohjiro Hara, Ryuzi Katoh, M Tachiya

Affiliation

¹ National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, Tsukuba, Ibaraki, Japan.

PMID: 16402821
DOI: 10.1021/ja055866p

Abstract

To investigate the primary process of photocatalytic oxidation of TiO2, interfacial charge-transfer reaction of trapped holes formed in nanocrystalline TiO2 films by UV irradiation was directly measured by highly sensitive femtosecond and nanosecond transient absorption spectroscopy under low intensity excitation condition to avoid fast electron-hole recombination. Accordingly, the rates and yields of photocatalytic oxidation of several alcohols adsorbed on TiO2 were evaluated successfully.