Figure 8: Quantum efficiencies (mol/Einstein)
of methane, extrapolated by (17), at infinite concentration of
substrate, relative to measurements carried out in the gaseous phase, and
corresponding to an absorbed power per unit length of irradiated photocatalytic
membrane, expressed of 4.0 Wcm−1, as a function of mol/mol % of
vanadium, used as photopromoter in the photocatalytic membranes, with respect
to titanium present as main photocatalyst.