6533b82efe1ef96bd1293c5c
RESEARCH PRODUCT
Heterogeneous photocatalytic degradation of nitrophenols
Vincenzo AugugliaroGiuseppe PantaleoE. SavinovA. Di PaolaLeonardo Palmisanosubject
chemistry.chemical_classificationGeneral Chemical EngineeringRadicalNitro compoundGeneral Physics and AstronomyGeneral ChemistryReaction intermediatePhotochemistryHydroxylationchemistry.chemical_compoundNitrophenolchemistryNitroPhotocatalysisAmmoniumdescription
The photocatalytic degradation of 2-, 3- and 4-nitrophenol has been investigated in oxygenated aqueous suspensions containing TiO2. The organic reaction intermediates have been determined by high performance liquid chromatography. The results indicate the complete mineralisation of the substrates and the formation of both nitrate and ammonium ions. The degradation pathways involve a rapid opening of the aromatic ring followed by a slower oxidation of the aliphatic compounds. The hydroxyl radicals are responsible for the primary attack of the nitrophenols with formation of dihydroxynitrobenzenes. The ring hydroxylation occurs in the positions activated by the contemporaneous presence of phenolic and nitro groups. The presence of ammonium ions confirms that reduction pathways are also operating.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2003-02-01 |