| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5147967 | International Journal of Hydrogen Energy | 2017 | 7 Pages |
Abstract
Scheme depicting the mechanism of electron hole pair formation using TiO2-APTMS-FA for water splitting. The band gap energy Eg of TiO2 is 3.2 eV. Photons with energy larger than the HOMO/OV-LUMO gap (ħÏ1 > 2.0 eV) get absorbed by OV/APTMS/FA. Note that the HOMO state is hybridized with the OV band of TiO2 at the surface. The holes that are left behind in the HOMO/OV state are filled by e-h pair generation from the TiO2 valence band (VB) to the HOMO-OV state by photons (ħÏ2 > 2.5 eV). Regular e-h pair generation in the conduction band (CB) and VB takes place through absorption of photons with ħÏ3 > Eg. The green parts of the band bending represent the extra potential barrier coming due to the surface modifications.181
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Authors
Shashank Saraf, Manuel Giraldo, Hari P. Paudel, Tamil S. Sakthivel, Cathrine Shepard, Ankur Gupta, Michael N. Leuenberger, Sudipta Seal,