A Li–F co-doped g-C₃N₄/TiO₂-B(001) heterostructure as an efficient hydrogen evolution photocatalyst

Abstract

The high recombination rate of photocarrier inhibits the photocatalytic efficiency of heterostructure due to the lack of the driving force of electron-hole separation. Herein, through Li-F co-doping, there is a...

Progress of charge carrier dynamics and regulation strategies in 2D CxNy-based heterojunctions

“…4(d), the hydrogen evolution rate of the heterojunction remained approximately 565.8 mmol g À1 h À1 during 13 hours of irradiation, which was significantly higher than that of the physical mixtures of TiO 2 and O-g-C 3 N 4 . The construction of chemical bonds in C x N y /metal oxide heterojunctions, such as the W-N bond in g-C 3 N 4 /WO 3 , 73 the N-O-Ti bond in g-C 3 N 4 / TiO 2 , 68 and the Li-F-Ti bond in g-C 3 N 4 /TiO 2 -B, 76 enhances the interaction between g-C 3 N 4 and the metal oxide interface. Serving as bridges for the transport of photoexcited carriers, these chemical bonds not only shorten the transport distance but also minimize unnecessary carrier losses.…”