title: Oxidation and reduction of nitrite ion in the TiO2 photo-induced catalytic reaction.
abstract: During a photo-induced catalytic reaction under near UV irradiation to an aqueous suspension of Ti4O2, about 95% of NO2- was oxidized to NO3-, but NH4+ was not detected. The oxidation was inhibited by the addition of mannitol or under anaerobic conditions. The nitration of HPA was observed in the presence of t-buthanol, suggesting the formation of ONOO. An ESR spectrum gave a triplet signal at g = 2.041,in the presence of NO2-, mannitol, FeSO4, and MGD, indicating the reduction of NO2- to NO.
authors.affiliation: Department of Life Science and Biotechnology, Faculty of Life and Environmental Science, Shimane University, Matsue, Japan. shibata@life.shimane-u.ac.jp
authors.forename: H
authors.initials: H
authors.lastname: Shibata
authors.forename: N
authors.initials: N
authors.lastname: Noda
authors.forename: Y
authors.initials: Y
authors.lastname: Ogura
authors.forename: K
authors.initials: K
authors.lastname: Sogabe
authors.forename: Y
authors.initials: Y
authors.lastname: Sawa
mesh_terms: D002384:Catalysis; D004578:Electron Spin Resonance Spectroscopy; D005290:Ferric Compounds / Q000378:metabolism; D008353:Mannitol / Q000378:metabolism; D009573:Nitrites / Q000378:metabolism*; D010084:Oxidation-Reduction; D010648:Phenylacetates / Q000378:metabolism; D010777:Photochemistry; D017319:Photosensitizing Agents / Q000494:pharmacology*; D014025:Titanium / Q000494:pharmacology*; D014466:Ultraviolet Rays
chemical_list: D005290:Ferric Compounds; D009573:Nitrites; D010648:Phenylacetates; D017319:Photosensitizing Agents; C009495:titanium dioxide; C024823:ferric sulfate; C008070:4-hydroxyphenylacetic acid; D008353:Mannitol; D014025:Titanium