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RESEARCH PRODUCT
The Existence of Nitrate Radicals in Irradiated TiO 2 Aqueous Suspensions in the Presence of Nitrate Ions
Stefano LivraghiLeonardo PalmisanoFrancesco ParrinoElio Giamellosubject
Double bondRadical010402 general chemistryPhotochemistry01 natural sciencesCatalysisCatalysiCatalysislaw.inventionphotocatalysichemistry.chemical_compoundNitratenitratelawTiO2Electron paramagnetic resonancechemistry.chemical_classificationradicalAqueous solution010405 organic chemistryAlkeneChemistry (all)General MedicineGeneral Chemistrynitrate; photocatalysis; radicals; TiO2; Catalysis; Chemistry (all)radicals0104 chemical scienceschemistryPhotocatalysisSettore CHIM/07 - Fondamenti Chimici Delle Tecnologiephotocatalysisdescription
Evidence of the existence of nitrate radical in irradiated aqueous TiO2 suspensions in the presence of nitrate ions are reported for the first time. The joint use of UV/Vis and EPR spectroscopy showed that nitrate radicals are formed by hole induced oxidation of nitrate ions. Photocatalytic degradation of a model alkene compound allowed to highlight the presence of an intermediate organic nitrate deriving from nitrate radical attack to the double bond of the substrate. These results not only allow deeper understanding of photocatalytic processes, but open the route to new green photocatalytic syntheses initiated by nitrate radicals and to new insights in the field of atmospheric chemistry.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-08-13 | Angewandte Chemie International Edition |