We have shown that copper species allowed for the absorption of visible-light. Furthermore, upon visiblelight exposure, Cu(II) is continuously reduced to Cu(I), allowing for the formation of TiO2-Cu2O junction, favouring the separation of the photogenerated exciton. Addition of graphene enhanced that electron mobility, decreasing the recombination rate of the photogenerated exciton. EPR spectroscopy confirms the reduction of Cu(II) to Cu(I), as well as the generation of reactive oxygen species (mainly superoxide radical anions) upon light exposure. Results showed that the addition of 1 mol% CuxO together with 1.0 wt% of graphene to TiO2 enabled up to a three-fold increase in the photocatalytic removal of those gaseous pollutants, compared to unmodified titania and to a commercially available TiO2. Prepared photocatalysts were also shown to be fully recyclable over repeated tests. This makes our material a suitable candidate for improving households' indoor air quality.