期刊
ADVANCED FUNCTIONAL MATERIALS
卷 29, 期 27, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201901024
关键词
2D materials; carbon nitride; exfoliation; photocatalysis; reassembly
类别
资金
- National Natural Science Foundation of China [21573158, 51502200, 51502198, 21633004]
- World Premier International Research Center Initiative (WPI Initiative) on Materials Nanoarchitectonics (MANA), MEXT, Japan
Switching the properties of photocatalytic materials targetedly and exerting these advantages fully in different photoredox reactions are crucial for the sufficient utilization of solar energy but still presents a significant challenge. This study presents a facile, green, and reversible exfoliation-reassembly strategy to switch the features of polymeric carbon nitride (CN) favorably for different photoredox reactions. The giant expansion effect of in situ-generated H2O molecules confined to the interlayer results in the mass production of ultrathin polymeric CN nanosheets, giving a high yield, i.e., up to 48%, of ultrathin nanosheets in a mild solution (pH approximate to 1.3). Interestingly, the exfoliation-reassembly process as well as the properties of CN are largely reversible via alternating the interlayer groups. Moreover, the exfoliated and reassembled CN achieve a superior photocatalytic activity for isopropanol degradation (acetone: 345 mu mol h(-1); CO2: 23 mu mol h(-1)) and H-2 evolution (1370 mu mol h(-1)), resulting in a high apparent quantum yield of 27% and 46%, respectively, at approximate to 420 nm.
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