Explaining the Enhanced Photocatalytic Activity of Degussa P25 Mixed-Phase TiO2 Using EPR
Publication type: Journal Article
Publication date: 2003-04-19
scimago Q1
wos Q3
SJR: 0.742
CiteScore: 5.3
Impact factor: 2.9
ISSN: 15206106, 15205207, 10895647
Materials Chemistry
Surfaces, Coatings and Films
Physical and Theoretical Chemistry
Abstract
Charge separation characteristics of a high-activity, mixed-phase titania photocatalyst (Degussa P25) are probed by EPR spectroscopy. While previous proposals consider rutile as a passive electron sink hindering recombination in anatase, this research details the critical and active role of rutile in TiO2 formulations. The inactivity of pure-phase rutile is due in part to rapid rates of recombination. Yet, in mixed-phase TiO2, charges produced on rutile by visible light are stabilized through electron transfer to lower energy anatase lattice trapping sites. These results suggest that within mixed-phase titania (P25) there is a morphology of nanoclusters containing atypically small rutile crystallites interwoven with anatase crystallites. The transition points between these two phases allow for rapid electron transfer from rutile to anatase. Thus, rutile acts as an antenna to extend the photoactivity into visible wavelengths and the structural arrangement of the similarly sized TiO2 crystallites creates ca...
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Hurum D. C. et al. Explaining the Enhanced Photocatalytic Activity of Degussa P25 Mixed-Phase TiO2 Using EPR // Journal of Physical Chemistry B. 2003. Vol. 107. No. 19. pp. 4545-4549.
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Hurum D. C., Agrios A. G., Rajh T., Thurnauer M. C. Explaining the Enhanced Photocatalytic Activity of Degussa P25 Mixed-Phase TiO2 Using EPR // Journal of Physical Chemistry B. 2003. Vol. 107. No. 19. pp. 4545-4549.
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TY - JOUR
DO - 10.1021/jp0273934
UR - https://doi.org/10.1021/jp0273934
TI - Explaining the Enhanced Photocatalytic Activity of Degussa P25 Mixed-Phase TiO2 Using EPR
T2 - Journal of Physical Chemistry B
AU - Hurum, Deanna C.
AU - Agrios, Alexander G.
AU - Rajh, Tijana
AU - Thurnauer, Marion C.
PY - 2003
DA - 2003/04/19
PB - American Chemical Society (ACS)
SP - 4545-4549
IS - 19
VL - 107
SN - 1520-6106
SN - 1520-5207
SN - 1089-5647
ER -
Cite this
BibTex (up to 50 authors)
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@article{2003_Hurum,
author = {Deanna C. Hurum and Alexander G. Agrios and Tijana Rajh and Marion C. Thurnauer},
title = {Explaining the Enhanced Photocatalytic Activity of Degussa P25 Mixed-Phase TiO2 Using EPR},
journal = {Journal of Physical Chemistry B},
year = {2003},
volume = {107},
publisher = {American Chemical Society (ACS)},
month = {apr},
url = {https://doi.org/10.1021/jp0273934},
number = {19},
pages = {4545--4549},
doi = {10.1021/jp0273934}
}
Cite this
MLA
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Hurum, Deanna C., et al. “Explaining the Enhanced Photocatalytic Activity of Degussa P25 Mixed-Phase TiO2 Using EPR.” Journal of Physical Chemistry B, vol. 107, no. 19, Apr. 2003, pp. 4545-4549. https://doi.org/10.1021/jp0273934.