Polymorphic phase study on nitrogen-doped TiO2 nanoparticles: effect on oxygen site occupancy, dye sensitized solar cells efficiency and hydrogen production - Kohlrausch, Emerson C.; Zapata, Maximiliano J. M.; Gonçalves, Renato Vitalino; Khan, Sherdil; Vaz, Mauricio de O.; Dupont, Jairton; Teixeira, Sérgio R.; Santos, Marcos J. Leite (RSC Advances, 2015)