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RESEARCH PRODUCT
Photocatalytic oxidation mechanism of benzonitrile in aqueous suspensions of titanium dioxide
Agatino Di PaolaLeonardo PalmisanoGiuseppe MarcìElisa I. García-lópezsubject
Benzonitrilechemistry.chemical_compoundAqueous solutionchemistryTitanium dioxideUltraviolet lightPhotocatalysisSubstrate (chemistry)General ChemistryMineralization (soil science)PhotochemistryCatalysisCatalysisdescription
Abstract The photocatalytic oxidation of benzonitrile was carried out in aqueous suspensions (pH 11) of commercial polycrystalline TiO 2 (Merck and Degussa P25) irradiated by ultraviolet light. The rate of decomposition was dependent on the concentration of benzonitrile and followed a pseudo-first order kinetics. The complete mineralization of a 0.70 mM benzonitrile solution was achieved in ca. 8 h by using TiO 2 Degussa P25, whereas the substrate was only partially mineralized even after 14 h of irradiation in the presence of TiO 2 Merck. The final oxidation products were carbonate and nitrate. The appearance and the evolution of organic and inorganic intermediate species were also investigated and allowed to hypothesize the reaction pathways.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-11-01 | Catalysis Today |