(Mo + N) codoped TiO2 for enhanced visible-light photoactivity

► Mo or N mono-doped and (Mo + N) co-doped anatase TiO2 nanoparticles have been fabricated by sol-gel method. ► (Mo + N) co-doped TiO2 has high photo absorption in whole visible region. ► Band structure calculations indicate more impurity bands can be induced by co-doping. ► The up-limit of dopant concentrations is increased by co-doping. ► (Mo + N) co-doped TiO2 is promising to have high photocatalystic efficiency under visible light.