Tuning of the Oxygen Species Linker on the Surface of Polymeric Carbon Nitride to Promote the Photocatalytic Hydrogen Evolution Performance
Tuning of the Oxygen Species Linker on the Surface of Polymeric Carbon Nitride to Promote the Photocatalytic Hydrogen Evolution Performance
复制标题
调节聚合物氮化碳表面的氧物质连接基以提高光催化析氢性能
DOI：
10.1002/cssc.202001027
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发表时间：
2020
期刊：
影响因子：
8.4
通讯作者：
Wang Xinming
中科院分区：
文献类型：
--
作者：
Lei Qin;Chen Rongzhi;Zhao Yurong;Chen Huanyu;Long Xinxin;Tan Jihua;Wang Xinming
聚合氮化碳（CN）因其相对较低的成本和易于对其电子结构进行修饰而被认为是有吸引力的光催化剂。在此，我们报告了一种有效的策略来调整聚合CN的表面氧物质连接位点，实现更有效的电荷分离。在可见光照射（λ>420 nm）下，光催化产氢速率约为10225 μmol h−1g−1，在430 nm处记录了令人印象深刻的5.7 %的表观量子效率（AQE）。具体来说，在H2和空气气氛下进行热处理使得CN表面的氧物质连接基从-C=O变为N=C-OH，然后变为-C-O-C-，导致电荷分布不平衡，从而显着增强了光生电荷分离，进一步有助于高产氢性能。这种连接体调控策略可能为高效光催化剂的开发提供新的途径。
Polymeric carbon nitrides (CNs) have been identified as attractive photocatalysts owing to their comparatively low cost and facile modification of their electronic structure. Herein, we report an effective strategy to tune the surface oxygen species linking site of polymeric CN, achieving more effective charge separation. A high photocatalytic hydrogen production rate of approximately 10225 μmol h−1g−1under visible light irradiation (λ>420 nm) and an impressive apparent quantum efficiency (AQE) of 5.7 % at 430 nm were recorded. Specifically, thermal treatment under a H2and then an air atmosphere allowed the oxygen species linker on the surface of CN to be changed from −C=O to N=C−OH and then −C−O−C−, resulting in unbalanced charge distribution, which significantly enhanced the photogenerated charge separation, further contributing to the high hydrogen production performance. This linker regulation strategy may provide a new path for the development of highly efficient photocatalysts.