Monodispersed TiO2-B nanoparticles with average size of 5.0 nm were prepared.
Black TiO2 nanoparticles were obtained by UV irradiation of monodispersed TiO2-B nanoparticles.
Air-stable black TiO2-B nanoparticles were obtained by heating at 340 °C and transformed to black anatase at 360 °C.