Glover, ENK;
Ellington, SG;
Sankar, G;
Palgrave, RG;
(2016)
The nature and effects of rhodium and antimony dopants on the electronic structure of TiO 2: towards design of Z-scheme photocatalysts.
Journal of Materials Chemistry A
, 4
(18)
pp. 6946-6954.
10.1039/C6TA00293E.
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Abstract
The nature and effects of rhodium and antimony doping in TiO2 have been investigated using X-ray diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Extended X-ray Absorption Fine Structure (EXAFS) analysis, X-ray Absorption Near Edge Structure (XANES) analysis and diffuse reflectance spectroscopy. Together these techniques build up a comprehensive picture of the dopant chemistry in this system. A range of Sb/Rh ratios have been analysed, and it is shown that the Fermi level can be tuned within the band gap through control of dopant stoichiometry, offering the possibility of designing Z-scheme components with specific band offsets. Spontaneous spatial segregation of dopants is measured using TiO2 (110) single crystals. This is shown to have a direct impact on the electronic structure in the region of the semiconductor surface, creating band bending that is expected to be critical for photocatalytic activity of these materials.
| Type: | Article |
|---|---|
| Title: | The nature and effects of rhodium and antimony dopants on the electronic structure of TiO 2: towards design of Z-scheme photocatalysts |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/C6TA00293E |
| Publisher version: | http://dx.doi.org/10.1039/C6TA00293E |
| Language: | English |
| Additional information: | This article is freely available. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (CC BY 3.0) |
| 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/1493391 |
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