Leaf-Mosaic-Inspired Vine-Like Graphitic Carbon Nitride Showing High Light Absorption and Efficient Photocatalytic Hydrogen Evolution
Leaf-Mosaic-Inspired Vine-Like Graphitic Carbon Nitride Showing High Light Absorption and Efficient Photocatalytic Hydrogen Evolution
复制标题
受叶马赛克启发的类藤蔓石墨碳氮化物表现出高光吸收和高效的光催化析氢能力
DOI：
10.1002/aenm.201801139
复制
发表时间：
2018
影响因子：
27.8
通讯作者：
Yangguang Li
中科院分区：
文献类型：
--
作者：
Yi Zhang;Lanlan Wu;Xinyu Zhao;Yingnan Zhao;Huaqiao Tan;Xia Zhao;Yuanyuan Ma;Zhao Zhao;Shuyan Song;Yonghui Wang;Yangguang Li
绿色植物在自然界中有效利用太阳能。模拟自然光合作用系统的精致结构可能会为构建具有高光捕获效率和性能的理想光催化剂开辟一种新方法。在此，受植物“叶花叶”优异的光利用的启发，通过尿素与双氰胺-甲醛（DF）树脂共聚，首次合成了一种新型藤蔓状g-C3N4（V-CN）。所制备的 V-CN 在可见光下表现出 13.6 mmol g−1h−1 的超高光催化产氢能力，在 420 nm 处的表观量子产率为 12.7%，比传统 g-C3N4 高约 38 倍，是活性最高的 g-C3N4 基光催化剂之一。这种超强的光催化性能源于V-CN独特的叶镶嵌结构，有效提高了其光利用率并提供了更大的比表面积。此外，DF树脂的引入进一步优化了V-CN的能带，扩展了其光吸收，提高了其结晶度和界面电荷传输，从而获得了高性能。这是一种简单、绿色的制备广谱、高性能g-C3N4的策略，通过模拟自然光合作用的精细结构，为其他纳米光催化剂的设计带来了重大进展。
Green plants use solar energy efficiently in nature. Simulating the exquisite structure of a natural photosynthesis system may open a new approach for the construction of desirable photocatalysts with high light harvesting efficiency and performance. Herein, inspired by the excellent light utilization of “leaf mosaic” in plants, a novel vine‐like g‐C3N4(V‐CN) is synthesized for the first time by copolymerizing urea with dicyandiamide‐formaldehyde (DF) resin. The as‐prepared V‐CN exhibits ultrahigh photocatalytic hydrogen production of 13.6 mmol g−1h−1under visible light and an apparent quantum yield of 12.7% at 420 nm, which is ≈38 times higher than that of traditional g‐C3N4, representing one of the highest‐activity g‐C3N4‐based photocatalysts. This super photocatalytic performance is derived from the unique leaf mosaic structure of V‐CN, which effectively improves its light utilization and affords a larger specific surface area. In addition, the introduction of DF resin further optimizes the energy band of V‐CN, extends its light absorption, and improves its crystallinity and interfacial charge transport, resulting in high performance. It is an easy and green strategy for the preparation of broad‐spectrum, high‐performance g‐C3N4, which presents significant advancement for the design of other nanophotocatalysts by simulating the fine structure of natural photosynthesis.