Graphene and TiO2 co-modified flower-like Bi2O2CO3: A novel multi-heterojunction photocatalyst with enhanced photocatalytic activity

A novel multi-heterojunction photocatalyst (graphene and TiO2 co-modified flower-like Bi2O2CO3) was prepared for the first time. The as-obtained samples showed much higher activity compared to pure Bi2O2CO3, TiO2 and GR-Bi2O2CO3 for dye degradation, which is almost 14 times higher than that of pure Bi2O2CO3 and also much higher than the sum of graphene-Bi2O2CO3 and TiO2.