“…Therefore, we calculated the related electronic properties of Cu/S-TiO 2 in this paper and the results were discussed, aiming at providing some basic insight of the photocatalytic activity enhancement for the experimental researches. Because there have been a lot of works focused on the calculations of pristine, single Cu or S doped anatase TiO 2 [4,14,15], so we will not discuss the single element Cu or S doped TiO 2 in this paper. We just concentrate on the electronic structures of Cu and S co-doped TiO 2 .…”