The Existence of Nitrate Radicals in Irradiated TiO2 Aqueous Suspensions in the Presence of Nitrate Ions

被引：29
|
作者：
Parrino, Francesco [1 ]
Livraghi, Stefano [2 ,3 ]
Giamello, Elio [2 ,3 ]
Palmisano, Leonardo [1 ]
机构：
[1] Univ Palermo, Dipartimento Energia Ingn Informaz & Modelli Mate, Viale Sci Ed 6, I-90128 Palermo, Italy
[2] Univ Torino, Dipartimento Chim, Via P Giuria 7, I-10125 Turin, Italy
[3] Univ Torino, NIS, Via P Giuria 7, I-10125 Turin, Italy
来源：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2018年 / 57卷 / 33期
关键词：
nitrate; photocatalysis; radicals; TiO2; NITRIC-ACID SOLUTIONS; INORGANIC-IONS; FORMATION MECHANISM; AEROSOL FORMATION; ORGANIC-COMPOUNDS; PULSE-RADIOLYSIS; NO3; REACTIVITY; CHEMISTRY; PHOTOCATALYSIS;
D O I：
10.1002/anie.201804879
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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.
引用
收藏
页码：10702 / 10706
页数：5
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