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Cited by 558

The DOI matches its Crossref record; 3 of the 3 references it cites were found in a registry or an index.

Oxidative Power of Nitrogen-Doped TiO2 Photocatalysts under Visible Illumination

Mrowetz, Marta, Balcerski, William, Colussi, A. J., Hoffmann, Michael R.·2004·The Journal of Physical Chemistry B
DOI 10.1021/jp0467090
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Abstract

Nitrogen doping was recently shown to extend the absorptivity of TiO 2 photocatalysts into the visible. We find that N-doped TiO 2 materials fail, however, to catalyze the oxidation of HCOO - into CO 2 •-, or of NH 3 OH + into NO 3 -, under visible illumination. By N-doping anatase at ambient or high temperature according to the literature we obtained yellow powders A and H, respectively, that absorb up to ∼520 nm. Aqueous H suspensions (pH ∼ 6, 1 atm O 2 ) photocatalyze the oxidation of HCOO - into CO 2 •- radicals at λ ∼ 330 nm, but the quantum yield of CO 2 •- formation at λ > 400 nm remains below ∼2 × 10 -5 and is probably zero. A is similarly inert toward HCOO - in the visible region and, moreover, unstable in the UV range. Thus, the holes generated on N-doped TiO 2 by visible photons are unable to oxidize HCOO - either by direct means or via intermediate species produced in the oxidation of water or the catalyst. Reports of the bleaching of methylene blue (MB) on N-doped TiO 2, which may proceed by direct oxidative or reductive photocatalytic pathways and also by indirect photocatalysis (i.e., induced by light absorbed by MB rather than by the catalyst) even under aerobic conditions are, therefore, rather uninformative about the title issue.

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Metadata

Authors
Mrowetz, M., Balcerski, W., Colussi, A. J., & Hoffmann, M. R.
Venue
The Journal of Physical Chemistry B
Publisher
American Chemical Society (ACS)
Published
2004-10-19
Volume
108
Issue
45
Pages
17269-17273
ISSN
  • 1520-5207 (ISSN-L)
  • 1520-6106
DOI
10.1021/jp0467090
OpenAlex
W2029955177
Cited by
558
References
3
FWCI
16.95
Type
journal article
Language
en
Open access
closed

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