Oxidation and Reduction of Nitrite Ion in the TiO2 Photo-induced Catalytic Reaction

• Published in: Bioscience, biotechnology, and biochemistry Vol. 64; no. 8; pp. 1751 - 1753
• Main Authors: SHIBATA, Hitoshi, NODA, Namiko, OGURA, Yasushi, SOGABE, Kunihisa, SAWA, Yoshihiro
• Format: Journal Article
• Language: English
• Published: Tokyo Japan Society for Bioscience, Biotechnology, and Agrochemistry 01.08.2000; Japan Society for Bioscience Biotechnology and Agrochemistry; Oxford University Press
• Subjects: Catalysis; Chemistry; Electron Spin Resonance Spectroscopy; Exact sciences and technology; Ferric Compounds - metabolism; General and physical chemistry; Mannitol - metabolism; nitric oxide; nitrite; Nitrites - metabolism; Oxidation-Reduction; peroxynitrite; Phenylacetates - metabolism; photo-induced catalysis; Photochemistry; Photosensitizing Agents - pharmacology; Physical chemistry of induced reactions (with radiations, particles and ultrasonics); Titanium - pharmacology; titanium dioxide; Ultraviolet Rays; Reaction inhibitor; Chemical reduction; Binary compound; Ultraviolet radiation; Transition metal Compounds; Nitrites; Photocatalysis; Mannitol; EPR spectrometry; Nitrates; Particle suspension; Titanium Oxides
• ISSN: 0916-8451; 1347-6947
• DOI: 10.1271/bbb.64.1751

During a photo-induced catalytic reaction under near UV irradiation to an aqueous suspension of TiO 2 , about 95% of NO 2 - was oxidized to NO 3 - , but NH 4 + 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 NO 2 - , mannitol, FeSO 4 , and MGD, indicating the reduction of NO 2 - to NO.