Alotaibi, AM;
Sathasivam, S;
Williamson, BAD;
Kafizas, A;
Sotelo-Vazquez, C;
Taylor, A;
Scanlon, DO;
(2018)
Chemical Vapor Deposition of Photocatalytically Active Pure Brookite TiO2 Thin Films.
Chemistry of Materials
, 30
(4)
pp. 1353-1361.
10.1021/acs.chemmater.7b04944.
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Abstract
Brookite is the least investigated phase of TiO2 due to the synthetic difficulty of obtaining the pure phase. Here, we present the first ever chemical vapor deposition synthesis of pure brookite TiO2 thin films. The films were highly crystalline and phase pure as determined by X-ray diffraction and Raman spectroscopy studies. Scanning electron microscopy studies showed the films to have a structured morphology consisting of pyramidal features. The photocatalytic properties of the brookite film, tested using stearic acid under UVA (365 nm) irradiation, were superior to both an anatase film grown under similar conditions and NSG Activ glass. Transient absorption spectroscopy showed that the innate electron–hole recombination dynamics are similar in brookite and anatase, akin to previous reports. The superior activity of the brookite film is hence attributed to the higher surface area compared to anatase.
| Type: | Article |
|---|---|
| Title: | Chemical Vapor Deposition of Photocatalytically Active Pure Brookite TiO2 Thin Films |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acs.chemmater.7b04944 |
| Publisher version: | http://dx.doi.org/10.1021/acs.chemmater.7b04944 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering 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/10047732 |
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