ABSTRACT
Heterogeneous photocatalysis technology is considered as a promising route to afford pollutant degradation as well as hydrogen production processes (Colón et al. 2007). Nowadays, the research activity in this field is focused in the development of novel alternative materials to traditional TiO2 capable to use of sunlight as the green energy source (Kubacka et al. 2012). In this sense, the utilization of solar light as efficient as possible has been largely pursued. For this scope, different strategies have been traditionally followed, based in all cases in the improvement of visible photon absorption. Among these, modification of TiO2 by anion-cation codoping or coupling TiO2 with other semiconductors with low band gaps have proved to be viable ways to allow the extension of light absorption edge (Li et al. 2007, Kubacka et al. 2009, Hidalgo et al. 2009 Colón et al. 2010). An alternative option consists on the creation of new single phase visible active catalysts which would overcome the drawbacks of doping (Zhang et al. 2005, Zhang et al. 2007, Song et al. 2011, Naya et al. 2011, Obregón et al. 2012).
