A route for the synthesis of Cu-doped TiO2 nanoparticles with a very low band gap

- A very low band gap energy is obtained for Cu-doped TiO2 nanoparticles synthesized.
- A methodology to obtain internally Cu-doped TiO2 is introduced.
- An extensive characterization of the samples has been developed.
- The nanoparticles can be of great use in photovoltaic and photocatalytic applications.