DOI: 10.1139/v85-032. Photogeneration of hydrogen peroxide in aqueous TiO<sub>2</sub> dispersions

Photogeneration of hydrogen peroxide in aqueous TiO2 dispersions

10.1139/v85-032

Crossref journal-article

Canadian Science Publishing

Canadian Journal of Chemistry (155)

Abstract

Evidence is presented which demonstrates that titanium dioxide does in fact photogenerate H2O2 in the presence of the donor sodium formate. However, this H2O2 has only a transient existence in aqueous dispersions. This was confirmed by experiments in which H2O2 was injected into the dispersion. The reasons for the lability of H2O2 are discussed and possible mechanisms presented. Electron paramagnetic resonance experiments using spin traps reveal that photolysis of TiO2 dispersion generates •OH radicals in the donor-free case while •CO2 radicals are observed in the presence of formate. These results are also consistent with H2O2 generation.

Bibliography

Harbour, J. R., Tromp, J., & Hair, M. L. (1985). Photogeneration of hydrogen peroxide in aqueous TiO2 dispersions. Canadian Journal of Chemistry, 63(1), 204â208.

Authors 3

John R. Harbour (first)
John Tromp (additional)
Michael L. Hair (additional)

References 0 Referenced 132

None

Dates

Type	When
Created	19 years, 3 months ago (May 8, 2006, 7:16 p.m.)
Deposited	1 month, 3 weeks ago (July 2, 2025, 12:27 p.m.)
Indexed	2 weeks, 2 days ago (Aug. 12, 2025, 6:11 p.m.)
Issued	40 years, 7 months ago (Jan. 1, 1985)
Published	40 years, 7 months ago (Jan. 1, 1985)
Published Print	40 years, 7 months ago (Jan. 1, 1985)

Funders 0

None

BibTeX

@article{Harbour_1985, title={Photogeneration of hydrogen peroxide in aqueous TiO2 dispersions}, volume={63}, ISSN={1480-3291}, url={http://dx.doi.org/10.1139/v85-032}, DOI={10.1139/v85-032}, number={1}, journal={Canadian Journal of Chemistry}, publisher={Canadian Science Publishing}, author={Harbour, John R. and Tromp, John and Hair, Michael L.}, year={1985}, month=jan, pages={204–208} }

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  "abstract": "<jats:p> Evidence is presented which demonstrates that titanium dioxide does in fact photogenerate H<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub> in the presence of the donor sodium formate. However, this H<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub> has only a transient existence in aqueous dispersions. This was confirmed by experiments in which H<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub> was injected into the dispersion. The reasons for the lability of H<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub> are discussed and possible mechanisms presented. Electron paramagnetic resonance experiments using spin traps reveal that photolysis of TiO<jats:sub>2</jats:sub> dispersion generates \u2022OH radicals in the donor-free case while \u2022CO<jats:sub>2</jats:sub> radicals are observed in the presence of formate. These results are also consistent with H<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub> generation. </jats:p>",
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