Synthesis of CdSe-graphene-TiO2 composites by a facile hydrothermal method with high photocatalytic performance

摘要

Herein we obtained a chemically bonded CdSe-graphene-TiO2 composites using a facile hydrothermal method. During the hydrothermal reaction, both of the reduction of graphene oxide and loading of CdSe and TiO2 particles were achieved. The as-prepared CdSe-graphene-TiO2 composites possessed great adsorptivity of dyes, extended light absorption range, and efficient charge separation properties simultaneously. Hence, in the photodegradation of methylene blue, a significant enhancement in the reaction rate was observed with CdSe-graphene-TiO2 composites, compared to the pure TiO2 and CdSe-TiO2. The high activity can be attributed to the synergetic effects of high charge mobility, and red shift in absorption edge of CdSe-graphene-TiO2 composites.