Low-temperature synthesis of water-dispersible anatase titanium dioxide nanoparticles for photocatalysis

► Water-dispersible TiO2 nanoparticles were synthesized at 80°C without surfactants. ► TiO2 nanoparticles were stabilized by electrostatic. ► TiO2 nanoparticles possess excellent quinoline degradation activity and recycle stability. ► Enhanced activity is due to large specific surface area and easy electron-hole transportation.