Abstract
To enhance the visible light absorption of anatase TiO2 photo-electrodes, the material was doped with carbon by two different methods: i) by spray pyrolysis under a CO2 atmosphere, and ii) by a post-deposition thermal treatment in a hexane-containing environment. For the hexane-treated samples, most of the carbon is located at the surface, from which it can be removed by re-oxidation at elevated temperatures. In addition, both methods seem to result in the presence of small amounts of carbon in the bulk of the material, as deduced from a small red-shift of the absorption edge of TiO2.
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Cristina, S.E., Schoonman, J. & van de Krol, R. Properties of Carbon-doped TiO2 (Anatase) Photo-Electrodes. MRS Online Proceedings Library 885, 1011 (2005). https://doi.org/10.1557/PROC-0885-A10-11
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DOI: https://doi.org/10.1557/PROC-0885-A10-11