Journal
ADVANCED ENERGY MATERIALS
Volume 8, Issue 25, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201801139
Keywords
carbon nitride; dicyandiamide-formaldehyde resin; H-2 production; leaf mosaic; photocatalysis
Categories
Funding
- National Natural Science Foundation of China [21771033, 21671036]
- Fundamental Research Funds for the Central Universities [2412018BJ001, 2412018ZD007]
- Opening Project of Key Laboratory of Polyoxometalate Science of the Ministry of Education [130014556]
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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(-1) h(-1) under visible light and an apparent quantum yield of 12.7% at 420 nm, which is approximate to 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.
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