Triamterene‐Grafted Graphitic Carbon Nitride with Electronic Potential Redistribution for Efficient Photocatalytic Hydrogen Evolution,Chemistry - An Asian Journal

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Triamterene‐Grafted Graphitic Carbon Nitride with Electronic Potential Redistribution for Efficient Photocatalytic Hydrogen Evolution
Chemistry - An Asian Journal ( IF 3.5 ) Pub Date : 2018-09-24 , DOI: 10.1002/asia.201801083
Miao Sun ₁ , Kui Li ₁ , Wei-De Zhang ₁ , Yu-Xiang Yu ₁

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In this study, a photocatalyst with a distorted skeleton and synthesized by grafting triamterene onto graphitic carbon nitride (g‐C₃N₄) frameworks was prepared. The pteridine ring of the triamterene‐based nitrogen‐enriched organic structure functions as a trapped electron site owing to its inductive effect. The benzene ring in triamterene plays an important role in the even dispersion of electrons by a conjugative effect. Redistribution of the intramolecular electronic potential is caused by a synergistic effect between the pteridine and benzene rings of triamterene and promotes separation and migration of the photoinduced charge carriers. After coupling with triamterene, the π electrons of g‐C₃N₄ are relocated; that is, the intrinsic electronic and band structures of g‐C₃N₄ are effectively modulated. The modified polymeric photocatalyst shows a high photocatalytic H₂ evolution rate of 157.5 μmol h⁻¹, a value that is 4.3 times higher than the H₂ evolution rate of pristine g‐C₃N₄ (36.8 μmol h⁻¹), with an apparent quantum efficiency of 9.7 % at λ=450 nm. The incorporation of triamterene into the g‐C₃N₄ frameworks significantly expands its π‐delocalized system by redistribution of the electronic potential, expands the visible‐light absorption range, and effectively promotes the separation and migration of photoinduced charge carriers. This strategy may provide a reference for promoting charge separation of g‐C₃N₄ through redistribution of the electronic potential and for synthesizing novel carbon nitride based semiconductors for efficient solar energy conversion into hydrogen.

中文翻译：

Triamterene接枝的石墨化氮化碳，具有电子电位重新分布，可有效释放光催化氢

在这项研究中，制备了具有扭曲骨架的光催化剂，该光催化剂是通过将氨苯_三丁烯接枝到石墨化碳氮化物（g-C ₃ N ₄）骨架上而合成的。由于其感应作用，基于氨丁三烯的氮富集的有机结构中的蝶啶环起捕获的电子位点的作用。氨苯蝶啶中的苯环通过共轭作用在电子的均匀分散中起重要作用。分子内电子电位的重新分布是由于蝶啶和苯并三苯并苯环之间的协同作用引起的，并促进了光诱导电荷载流子的分离和迁移。与氨苯蝶啶偶联后，g‐C ₃ N ₄的π电子搬迁；也就是说，有效地调制了g‐C ₃ N ₄的本征电子和能带结构。改性的聚合物光催化剂显示出高的光催化H ₂释放速率157.5μmolh ^-1，该值比原始g-C ₃ N ₄（36.8μmolh ^-1）的H ₂释放速率高4.3倍。λ = 450 nm时的表观量子效率为9.7％。将氨苯蝶啶掺入g‐C ₃ N _4中框架通过电子势能的重新分布显着扩展了其π非定域系统，扩展了可见光吸收范围，并有效地促进了光诱导电荷载流子的分离和迁移。该策略可为通过重新分配电势促进g-C ₃ N _4的电荷分离以及合成新型的基于氮化碳的半导体以将太阳能有效地转化为氢提供参考。

更新日期：2018-09-24

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