An (qualitative and quantitative) identification of all of the intermediates of benzene photocatalytic oxidation is well beyond the scope of this work. However, with the available experimental data, together with the support of previous literature, we could speculate about (some of) the likely photocatalytic degradation products of benzene oxidation. To this aim, we extracted (at selected irradiation times) gas-chromatograms from the gas-analyser during the photocatalytic experiments -specimen Cu-G1.0/450, shown in Figure .