Previous studies have demonstrated linear polymers embedded with B←N units display efficient photocatalytic hydrogen evolution performance,but their limited structural tunability restricts photogenerated carrier dyna...Previous studies have demonstrated linear polymers embedded with B←N units display efficient photocatalytic hydrogen evolution performance,but their limited structural tunability restricts photogenerated carrier dynamics modulation.Current researches mainly focus on linear polymers,while the study of B←N units in the field of two-dimension conjugated polymers(2DCPs)photocatalytic hydrogen evolution remains an uncultivated ground.Herein,three 2DCPs containing B←N units were synthesized and their photocatalytic hydrogen production performance was investigated.Among them,the BN-Tz exhibited the best property with a hydrogen production rate of 89.5μmol·h^(-1),while BN-Ph and BN-TPB were only 26.4 and 8.5μmol·h^(-1),respectively.Comprehensive analyses showed that the remarkable photocatalytic ability of BN-Tz catalyst was mainly attributed to its superior transport and separation of photogenerated carriers,as well as the ability to construct a stronger built-in electric field and better planarity.Meanwhile,it was found that the manipulation of the electronic properties of the structures connected to the B←N unit could effectively regulate the molecular polarity,thus achieving the control of the electronic structure of the materials.This work extends the application of materials containing B←N units in photocatalysis and lays a good foundation for the subsequent design of photocatalysts containing B←N units.展开更多
基金supported by the National Key R&D Program of China(2023YFA1506800-2023YFA1506804)the National Natural Science Foundation of China(Nos.22171111 and 22071093)+1 种基金the Fundamental Research Funds for the Central Universities(lzujbky-2017-k07)the China Northern Rare Earth(Group)High-Tech Co.,Ltd.(No.BFXT-2023-D-0046)。
文摘Previous studies have demonstrated linear polymers embedded with B←N units display efficient photocatalytic hydrogen evolution performance,but their limited structural tunability restricts photogenerated carrier dynamics modulation.Current researches mainly focus on linear polymers,while the study of B←N units in the field of two-dimension conjugated polymers(2DCPs)photocatalytic hydrogen evolution remains an uncultivated ground.Herein,three 2DCPs containing B←N units were synthesized and their photocatalytic hydrogen production performance was investigated.Among them,the BN-Tz exhibited the best property with a hydrogen production rate of 89.5μmol·h^(-1),while BN-Ph and BN-TPB were only 26.4 and 8.5μmol·h^(-1),respectively.Comprehensive analyses showed that the remarkable photocatalytic ability of BN-Tz catalyst was mainly attributed to its superior transport and separation of photogenerated carriers,as well as the ability to construct a stronger built-in electric field and better planarity.Meanwhile,it was found that the manipulation of the electronic properties of the structures connected to the B←N unit could effectively regulate the molecular polarity,thus achieving the control of the electronic structure of the materials.This work extends the application of materials containing B←N units in photocatalysis and lays a good foundation for the subsequent design of photocatalysts containing B←N units.
