Enhancement of photocatalytic activity of TiO2 nanoparticles by coupling Sb2O3

► The particle size of Sb2O3/TiO2 nanoparticles was in the range of 20-50 nm. ► Sb2O3 doping enhanced the photocatalytic activity of TiO2. ► Sb2O3 was formed on the surface of TiO2, and the SbOTi bonds were formed. ► The separation of photoinduced electron-hole pairs is an important step.