alexa Correlation between the non-stoichiometry of titanium dioxide and its photoelectrochemical behavior.
Materials Science

Materials Science

Research & Reviews: Journal of Material Sciences

Author(s): Jaques Gautron, Philippe Lemasson, JeanFrancis Marucco

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TiO2(rutile) has been reduced in well-defined conditions to give n-type TiO2–x semiconductors in which both the nature and concentration of the defects attributed to reduction are known. The influence of the value of x in TiO2–x on the efficiency of such a material when used as a photoanode is very marked and, in particular, there exists a value of x for which this efficiency is a maximum. The influence of x on the electrochemical behaviour of TiO2–x is only noticeable for electrodes whose active surface has been previously mechanically polished. Finally the broadening of the absorption spectrum towards the visible as x increases can be attributed to the existence of deep acceptor levels which are excited by the light, giving free holes that can be involved in the OH– oxidation process.

This article was published in Faraday Discuss ChemSoc and referenced in Research & Reviews: Journal of Material Sciences

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