“…However, no semiconductor material capable of catalyzing the overall water splitting under action of visible radiation around 600 nm, with a quantum efficiency high enough to make possible the commercial application (Maeda & Domen, 2007;Jing et al, 2010). Besides, many of the photocatalysts capable to induce hydrogen production with commercially acceptable quantum efficiency, with excitation between 300 and 450 nm, are expensive and inadequate from the environmental point of view (Zeug et al, 1985;Maeda et al, 2006;Bao et al, 2008).…”