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Tuning of the Oxygen Species Linker on the Surface of Polymeric Carbon Nitride to Promote the Photocatalytic Hydrogen Evolution Performance.
ChemSusChem ( IF 7.5 ) Pub Date : 2020-05-26 , DOI: 10.1002/cssc.202001027 Qin Lei 1 , Rongzhi Chen 1, 2 , Yurong Zhao 1 , Huanyu Chen 1 , Xinxin Long 3 , Jihua Tan 1 , Xinming Wang 2
ChemSusChem ( IF 7.5 ) Pub Date : 2020-05-26 , DOI: 10.1002/cssc.202001027 Qin Lei 1 , Rongzhi Chen 1, 2 , Yurong Zhao 1 , Huanyu Chen 1 , Xinxin Long 3 , Jihua Tan 1 , Xinming Wang 2
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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−1 g−1 under 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 H2 and 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.
中文翻译：
调整聚合碳氮化物表面上的氧物种连接子，以促进光催化氢的释放性能。
聚合碳氮化物（CNs）由于其相对较低的成本和易于改变其电子结构的特性而被认为是有吸引力的光催化剂。本文中，我们报告了一种有效的策略，可调节聚合物CN的表面氧物种连接位点，从而实现更有效的电荷分离。记录到在可见光照射下（λ > 420 nm）高的光催化制氢速率约为10225μmolh -1 g -1，在430 nm处的表观量子效率（AQE）达到5.7％。具体而言，在H 2下进行热处理然后空气气氛使CN表面的氧连接基从-C = O变为N = C-OH，然后从-C-OCC-转变，导致电荷分布不平衡，从而显着增强了光生电荷分离，进一步提高了制氢性能。该接头调节策略可为开发高效光催化剂提供一条新途径。
更新日期：2020-07-22
中文翻译：
调整聚合碳氮化物表面上的氧物种连接子，以促进光催化氢的释放性能。
聚合碳氮化物（CNs）由于其相对较低的成本和易于改变其电子结构的特性而被认为是有吸引力的光催化剂。本文中，我们报告了一种有效的策略，可调节聚合物CN的表面氧物种连接位点，从而实现更有效的电荷分离。记录到在可见光照射下（λ > 420 nm）高的光催化制氢速率约为10225μmolh -1 g -1，在430 nm处的表观量子效率（AQE）达到5.7％。具体而言，在H 2下进行热处理然后空气气氛使CN表面的氧连接基从-C = O变为N = C-OH，然后从-C-OCC-转变，导致电荷分布不平衡，从而显着增强了光生电荷分离，进一步提高了制氢性能。该接头调节策略可为开发高效光催化剂提供一条新途径。
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