However, being a wide-gap semiconductor, TiO2 needs UVA light for the photocatalytic phenomenon to be exploited on its surface . This goes against the usual lighting used indoors: lamps emitting in the visible region of the solar spectrum. Furthermore, a recent directive of the European Union states that light emitting diodes (LEDs) bulbs, emitting with no UV lines, should replace fluorescent and/or incandescent lamps as household room illumination systems . Indeed, there are advantages of LED technology over the classical light irradiation sources: they do contain no Hg, they have higher energy efficiency, and have longer life-time . Thus, the need to modify titania's surface for this to absorb visible light, and being active under real indoor household conditions, is concrete. Indeed, most of the previous research about photocatalysis and visible-light deal with halogen or xenon arc lamps , are not compatible with those used in an actual indoor environment. Little work has been carried out using common household visible-LEDs so far, the majority of the research dealing with organic dyes decolourisation. Ferrari-Lima and colleagues tested the photocatalytic activity of N-doped TiO2 and ZnO in aqueous solutions containing benzene, toluene and xylenes using a white LED lamp . Douven and co-workers used a near-visible LED light (emission at 395 nm) and TiO2 co-doped with nitrogen and iron for the degradation of an organic dye in the liquid-solid phase . A low power LED bulb and sulfur-doped TiO2 were used to decolour an organic dye solution . Yet, Vaiano and et al. showed that N-doped TiO2 modified with organic up-conversion phosphors was able to decolour a number of organic dyes in aqueous suspension using white LEDs . [It has to be stressed that these latter works are not the ideal systems to show visible-light photocatalytic activity, as photosentisitation effects may happen .] A very recent work by Eimer et al. showed that mesoporous nanostructured TiO2 co-doped with iron and carbon was effective in the photocatalytic degradation of ibuprofen using visible-LED modules .