首页|2D Conjugated Polymers Containing B←N Units for Improved Photocatalytic Hydrogen Evolution
2D Conjugated Polymers Containing B←N Units for Improved Photocatalytic Hydrogen Evolution
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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 hy-drogen evolution remains an uncultivated ground.Herein,three 2DCPs containing B←N units were synthesized and their photocata-lytic hydrogen production performance was investigated.Among them,the BN-Tz exhibited the best property with a hydrogen pro-duction rate of 89.5 μmol·h-1,while BN-Ph and BN-TPB were only 26.4 and 8.5 μmolh-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 materi-als containing B←N units in photocatalysis and lays a good foundation for the subsequent design of photocatalysts containing B←N units.
BoronB←N unitTwo-dimensional conjugated polymersPhotocatalysisHydrogenBuilt-in electric fieldPlanarityMolecular polarity
Mingcai Zhang、Xuan Wu、Yongqing Zhao、Jincai Wu、Xiaobo Pan
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State Key Laboratory of Applied Organic Chemistry(Lanzhou University),Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province,Lanzhou Magnetic Resonance Center,College of Chemistry and Chemical Engineering,Lanzhou University,Lanzhou,Gansu 730000,China
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