Abstract
In this article, thin solid films are processed via pulsed-pressure metal organic chemical vapour deposition (PP-MOCVD) on FTO substrates over a range of processing times to produce a range of thicknesses and microstructures. The films are highly nanostructured anatase-rutile TiO2 composite films with unique single crystal dendrites. After annealing, carbon was removed, and materials showed improved water splitting activity; with IPCEs above 80% in the UV, photocurrents of ∼1.2 mA cm−2 at 1.23 VRHE at 1 sun irradiance and an extension of photoactivity into the visible range. The annealed material exhibits minimal recombination losses and IPCEs amongst the highest reported in the literature; attributed to the formation of a high surface area nanostructured material and synergetic interactions between the anatase and rutile phases.
Original language | English |
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Pages (from-to) | 904-911 |
Number of pages | 8 |
Journal | Applied Catalysis B: Environmental |
Volume | 224 |
Early online date | 16 Nov 2017 |
DOIs | |
Publication status | Published - May 2018 |
Keywords
- Anatase-rutile heterojunctions
- Nanostructured photoelectrodes
- PP-MOCVD
- Solar water splitting
- Titanium dioxide (TiO)
ASJC Scopus subject areas
- Catalysis
- General Environmental Science
- Process Chemistry and Technology
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Susan Krumdieck
- School of Energy, Geoscience, Infrastructure and Society - Professor
- School of Energy, Geoscience, Infrastructure and Society, Institute for Life and Earth Sciences - Professor
Person: Academic (Research & Teaching)