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Reactions of Hydrous Titanium Oxide Colloids with Strong Oxidizing Agents
dc.creator | Rajh, Tijana | |
dc.creator | Šaponjić, Zoran | |
dc.creator | Micić, O. I. | |
dc.date.accessioned | 2023-06-01T09:09:17Z | |
dc.date.available | 2023-06-01T09:09:17Z | |
dc.date.issued | 1992 | |
dc.identifier.issn | 0743-7463 | |
dc.identifier.uri | https://riofh.iofh.bg.ac.rs/handle/123456789/18 | |
dc.description.abstract | The absorption spectra of the transients formed in the reactions of titanium hydrous oxide with SO4•-, Tl2+, or OH* species in alkaline aqueous solution have been studied by using the pulse radiolysis technique. Direct hole capture via interfacial electron transfer from colloidal titanium hydrous oxide to SO4•- radicals leads to the formation of a product which has the broad absorption spectrum with an onset at about 480 nm rising steeply toward the UV region. A completely different absorption spectrum was found for the hydroxyl radical adduct formed by the reaction of OH* with titanium hydrous oxide that has a maximum at 620 nm. This maximum disappears in acidic solution at pH 3 with assistance of H+aq which transforms the OH adduct to the product the same as that formed in the reaction with SO4•-. The low-weight aggregates of titanium hydroxide also react with OH* radicals, and in the alkaline solution a similar transient spectrum with a maximum at 570 nm was obtained. In neutral and alkaline solutions the absorption spectra of transients formed in the reactions of OH*, Tl2+, or SO4•- with TiO2 do not appear to be dependent upon the mode of the colloid preparation. However, decay kinetics of these transients are very sensitive to surface chemistry. | en |
dc.rights | restrictedAccess | |
dc.source | Langmuir | |
dc.title | Reactions of Hydrous Titanium Oxide Colloids with Strong Oxidizing Agents | en |
dc.type | article | |
dc.rights.license | ARR | |
dc.citation.epage | 1270 | |
dc.citation.issue | 5 | |
dc.citation.other | 8(5): 1265-1270 | |
dc.citation.rank | M21 | |
dc.citation.spage | 1265 | |
dc.citation.volume | 8 | |
dc.identifier.doi | 10.1021/la00041a006 | |
dc.identifier.rcub | conv_1335 | |
dc.identifier.scopus | 2-s2.0-0026868810 | |
dc.type.version | publishedVersion |