光催化
苯酚
单线态氧
化学
光化学
氧气
二氧化钛
无机化学
氮气
氮氧化物
激进的
碳纤维
催化作用
材料科学
有机化学
燃烧
复合数
冶金
复合材料
作者
Alessia Zollo,Stefano Livraghi,Elio Giamello,Andrea Cioni,Valentina Dami,Giada Lorenzi,Giovanni Baldi,Stefano Agnoli,Mateusz Adam Baluk,Anna Gołąbiewska,Adriana Zaleska‐Medynska
标识
DOI:10.1016/j.jece.2023.111523
摘要
A carbon and nitrogen TiO2 (C/N-TiO2) photocatalyst has been obtained modifying a commercial TiO2 using ammonium citrate. The photocatalyst has been tested in two photocatalytic tests under visible light, NOx abatement in gas phase and phenol degradation in liquid phase monitoring in parallel the formation of reactive oxygen species (ROS) via EPR. We achieved a deep insight about its activity, which relies on superoxide and singlet oxygen (O2•and 1O2) with no role of OH• radicals. The singlet oxygen (1O2) is exclusively a result of the excitation of the surface carbonaceous species and it is essential to oxidize phenol but limits the abatement of nitric oxide. The photocatalyst activity can be modulated according to its actual application tuning the carbon content. The oxidation of phenol in liquid environment is favoured by the presence of the carbonaceous phase while NO abatement is favoured by its partial removal.
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