Generation and Deactivation Processes of Superoxide Formed on TiO2 Film Illuminated by Very Weak UV Light in Air or Water
Publication type: Journal Article
Publication date: 2000-05-01
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
Kinetics of photogenerated O2- under very weak light illumination (1 μW cm-2) at the air−TiO2 interface as well as the water−TiO2 interface were studied quantitatively by measuring the chemiluminescence from luminol dropped on TiO2 film-type photocatalysts. The total number of steady-state O2- on TiO2 surface was determined from the chemiluminescence intensity; about 1 × 1014 cm-2 at the air−TiO2 interface and about 2 × 1014 cm-2 at the water−TiO2 interface. From the initial relation between illuminated number of photons and generated number of O2-, the generation yield of O2- was estimated to be about 40% at the air−TiO2 interface and about 80% at the water−TiO2 interface. The generation and deactivation kinetics suggest that O2- is recombined with a trapped hole on the surface and releases an electron to TiO2, producing free oxygen, and that most O2- do not migrate into the air or water bulk, but exist as adsorbed form on TiO2.
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163
Total citations:
163
Citations from 2025:
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(1.23%)
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Ishibashi K. et al. Generation and Deactivation Processes of Superoxide Formed on TiO2 Film Illuminated by Very Weak UV Light in Air or Water // Journal of Physical Chemistry B. 2000. Vol. 104. No. 20. pp. 4934-4938.
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Ishibashi K., Fujishima A., WATANABE T., HASHIMOTO K. Generation and Deactivation Processes of Superoxide Formed on TiO2 Film Illuminated by Very Weak UV Light in Air or Water // Journal of Physical Chemistry B. 2000. Vol. 104. No. 20. pp. 4934-4938.
Cite this
RIS
Copy
TY - JOUR
DO - 10.1021/jp9942670
UR - https://doi.org/10.1021/jp9942670
TI - Generation and Deactivation Processes of Superoxide Formed on TiO2 Film Illuminated by Very Weak UV Light in Air or Water
T2 - Journal of Physical Chemistry B
AU - Ishibashi, Kenichi
AU - Fujishima, Akira
AU - WATANABE, Toshiya
AU - HASHIMOTO, Kenichiro
PY - 2000
DA - 2000/05/01
PB - American Chemical Society (ACS)
SP - 4934-4938
IS - 20
VL - 104
SN - 1520-6106
SN - 1520-5207
SN - 1089-5647
ER -
Cite this
BibTex (up to 50 authors)
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@article{2000_Ishibashi,
author = {Kenichi Ishibashi and Akira Fujishima and Toshiya WATANABE and Kenichiro HASHIMOTO},
title = {Generation and Deactivation Processes of Superoxide Formed on TiO2 Film Illuminated by Very Weak UV Light in Air or Water},
journal = {Journal of Physical Chemistry B},
year = {2000},
volume = {104},
publisher = {American Chemical Society (ACS)},
month = {may},
url = {https://doi.org/10.1021/jp9942670},
number = {20},
pages = {4934--4938},
doi = {10.1021/jp9942670}
}
Cite this
MLA
Copy
Ishibashi, Kenichi, et al. “Generation and Deactivation Processes of Superoxide Formed on TiO2 Film Illuminated by Very Weak UV Light in Air or Water.” Journal of Physical Chemistry B, vol. 104, no. 20, May. 2000, pp. 4934-4938. https://doi.org/10.1021/jp9942670.