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Issue 7, 2015
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Properties and photochemistry of valence-induced-Ti3+ enriched (Nb,N)-codoped anatase TiO2 semiconductors

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Abstract

Nb and N codoped TiO2s are outstandingly versatile semiconductor oxides. Their high conductivity makes them valid alternatives to commercially available, but very expensive, conductive oxides. They show increased photonic efficiencies compared to the cases of solely Nb or N doped TiO2, when used as visible light sensitised photocatalysts. Furthermore, they are excellent materials for O2 sensors at very low temperature. Despite these remarkable properties, a clear picture of the electronic and optical mechanisms induced by the simultaneous presence of the dopants has just begun to be understood. Using a combination of electron paramagnetic resonance (EPR) spectroscopy, electrochemical impedance spectroscopy (EIS) and optical spectroscopy, we present here novel fundamental insights into the mechanisms responsible for the enhanced conductivity and visible light photochemistry.

Graphical abstract: Properties and photochemistry of valence-induced-Ti3+ enriched (Nb,N)-codoped anatase TiO2 semiconductors

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Publication details

The article was received on 27 Nov 2014, accepted on 06 Jan 2015, published on 06 Jan 2015 and first published online on 06 Jan 2015


Article type: Communication
DOI: 10.1039/C4CP05521G
Citation: Phys. Chem. Chem. Phys., 2015,17, 4849-4853
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    Properties and photochemistry of valence-induced-Ti3+ enriched (Nb,N)-codoped anatase TiO2 semiconductors

    A. Folli, J. Z. Bloh, A. Lecaplain, R. Walker and D. E. Macphee, Phys. Chem. Chem. Phys., 2015, 17, 4849
    DOI: 10.1039/C4CP05521G

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