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Optical band structure and photogenerated carriers transfer dynamics in FTO/TiO2 heterojunction photocatalysts.
- Source :
-
Applied Catalysis B: Environmental . Dec2016, Vol. 199, p224-229. 6p. - Publication Year :
- 2016
-
Abstract
- The FTO/TiO 2 heterojunction photocatalysts were prepared and characterized by XRD, SEM, UV–vis and electrochemical impedance measurement. The effect of F doping level on the optical band gap and conductivity of as-prepared FTO samples, as well as the band alignment of FTO/TiO 2 heterojunction photocatalyst was detailed analyzed. In addition, the change of optical band structure and conductivity caused by F doing was correlated with observed carriers transport properties including charge carriers separation, transport and interface transfer in the FTO/TiO 2 heterojunction photocatalyst. Finally, the photocatalytic activity, photoelectrocatalytic performance and their photocatalytic mechanism were systematically discussed. The primary results demonstrate that the heterojunction structure in the FTO/TiO 2 photocatalyst can effectively separate photogenerated carriers; however, the expense of redox ability is unavoidable. Among these, the FTO(1)/TiO 2 sample displays the highest photocatalytic activity, which is attributed to that the benefit of inhibiting recombination has dominant effect on photocatalytic performance. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09263373
- Volume :
- 199
- Database :
- Academic Search Index
- Journal :
- Applied Catalysis B: Environmental
- Publication Type :
- Academic Journal
- Accession number :
- 117292511
- Full Text :
- https://doi.org/10.1016/j.apcatb.2016.05.070