A facile approach to synthesis carbon quantum dots-doped P25 visible-lightdriven photocatalyst with improved NO removal performance

Özet

The water-soluble carbon quantum dots (CQDs) and a novel composite photocatalyst CQDs/P25 have beenprepared by a one-step electrochemical-microwave method. The experimental result shows that the photo-catalytic degradation of NO by this new kind of CQDs/P25 composite reaches 71%, which is approximately 1.65times than that of the pure P25 at room temperature. The initial concentration of NO pollutants is 10 ppm. Thephotocatalytic efficiency of the composite catalyst achieves the highest when the content of CQDs is 1%. It canbe concluded that the CQDs extend the light absorption range and adjust the band gap of pure P25. The highphotocatalytic performance of this new kind of photocatalyst can be mainly attributed to the unique up-con-versionfluorescence property, nanometer size effect and surface activity effect.