A Z-scheme TiO₂ quantum dots fragment-Bi₁₂TiO₂₀ composites for enhancing photocatalytic activity

To completely utilize the high redox ability of photo-induced charge carriers. Here, a Z-scheme photocatalyst of TiO₂ QDs/Bi₁₂TiO₂₀ (TBT) composites with TiO₂ QDs fragment attached to the surface of Bi₁₂TiO₂₀ (BTO) was prepared and the photocatalytic activity was evaluated by degradation of gatifloxacin (GF). The optimal photocatalytic performance of TBT displayed 3 times higher than bare BTO. The improved photocatalytic performance was ascribed to the effective separation of the charge carriers between TiO₂ QDs and BTO via the direct Z-scheme heterojunction. Such a strategy for the construction of Z-scheme TBT composites for removal of organic pollutants, proving new insights into design photocatalyst.