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Rutile to anatase phase transition induced by N doping in highly oriented TiO2 films

Breeson, AC; Sankar, G; Goh, GK; Palgrave, RG; (2016) Rutile to anatase phase transition induced by N doping in highly oriented TiO2 films. Physical Chemistry Chemical Physics , 18 (35) pp. 24722-24728. 10.1039/c6cp04003a. Green open access

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Abstract

Highly oriented TiO2 thin films were deposited onto Al2O3(0001), SrTiO3(001), and LaAlO3(001) substrates by spin coating a titanium alkoxide precursor solution followed by annealing. The films were nitrogen doped by two different routes: either by adding tetramethyethylenediamine (TMEDA) to the precursor solution or alternatively by high temperature ammonolysis. Undoped TiO2 films were highly oriented and the phase was dependent on the substrate. N doping by ammonolysis led to transformation of rutile films to anatase, confirmed by XRD and by XPS valence band spectroscopy. Significant differences were observed in the spatial distribution of the nitrogen dopant depending upon which synthesis method was used. These two factors may shed light on the increased photocatalytic efficiencies reported in N doped TiO2.

Type: Article
Title: Rutile to anatase phase transition induced by N doping in highly oriented TiO2 films
Location: England
Open access status: An open access version is available from UCL Discovery
DOI: 10.1039/c6cp04003a
Publisher version: http://dx.doi.org/10.1039/c6cp04003a
Language: English
Additional information: Copyright © the Owner Societies 2016.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/1517672
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