التفاصيل البيبلوغرافية
| العنوان: |
The nature and effects of rhodium and antimony dopants on the electronic structure of TiO2: towards design of Z-scheme photocatalysts. |
| المؤلفون: |
Glover, E. N. K., Ellington, S. G., Sankar, G., Palgrave, R. G. |
| المصدر: |
Journal of Materials Chemistry A; 5/14/2016, Vol. 4 Issue 18, p6946-6954, 9p |
| مستخلص: |
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. [ABSTRACT FROM AUTHOR] |
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