UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

The nature and effects of rhodium and antimony dopants on the electronic structure of TiO 2: towards design of Z-scheme photocatalysts

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. Green open access

[thumbnail of c6ta00293e.pdf]
Preview
Text
c6ta00293e.pdf - Published Version

Download (1MB) | Preview

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
Downloads since deposit
194Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item