Photoassisted Fenton oxidation

Chen, R Pignatello, JJ. Role of quinone intermediates as electron shuttles in Fenton and photoassisted Fenton oxidations of aromatic compormds. Environmental Science Technology, 1997 31, 2399-2406. 

Hsueh, C-L Huanga, Y-H Wang, C-C Chena, C-Y. Photoassisted Fenton degradation of nonbiodegradable azo-dye (Reactive Black 5) over a novel supported iron oxide catalyst at neutral pH. Journal of Molecular Catalysis A Chemical, 2006 245, 78-86. 

Pignatello JJ, Liu D, Huston P. Evidence for an additional oxidant in the photoassisted Fenton reaction. Environ Sci Technol 1999 33 1832-1839. 

Pignatello JJ, Sun Y. Complete oxidation of metolachlor and methyl parathion in water by the photoassisted Fenton reaction. Water Res 1995 29 1837-1844. 

Feng J, Hu X, Yue PL, Zhu HY, Lu GQ. Degradation of azo-dye Orange II by a photoassisted Fenton reaction using a novel composite of iron oxide and silicate nanoparticles as a catalyst. Ind Eng Chem Res 2003 42 2058-66. 

Photoreactions that involve transition metal ions, complexes or compounds can usually be classified as (photo)redox (simultaneous oxidation and reduction) processes. A representative non-photoassisted catalytic system is Fenton s reagent that produces HO radicals on reaction of ferrous ions (Fe2 +) and hydrogen peroxide (Scheme 6.287a). Its photochemical counterpart is the photo-Fenton process,1527 in which ferric (Fe3 + ) complexes in aqueous solutions (absorbing over 300 nm) are reduced to ferrous ions (Scheme 6.287b). 

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