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Abstract：
The delamination of layered crystals that produces single or few-layered nanosheets while enabling exotic physical and chemical properties, particularly for semiconductor functions in optoelectronic applications, remains a challenge. Here, we report a facile and green approach to prepare few-layered polymeric carbon nitride (PCN) semiconductors by a one-step carbon/nitrogen steam reforming reaction. Bulky PCN, obtained from typical precursors including urea, melamine, dicyandiamide, and thiourea, are exfoliated into few-layered nanosheets, while engineering its surface carbon vacancies. The unique sheet structures with strengthened surface properties endow PCNs with more active sites, and an increased charge separation efficiency with a prolonged charge lifetime, drastically promoting their photoredox performance. After an assay of a H-2 evolution reaction, an apparent quantum yield of 11.3% at 405 nm was recorded for the PCN nanosheets, which is much higher than those of PCN nanosheets. This delamination method is expandable to other carbon-based 2D materials for advanced applications.
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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
ISSN： 1433-7851
Year： 2017
Issue： 14
Volume： 56
Page： 3992-3996
1 2 . 1 0 2
JCR@2017
1 6 . 1 0 0
JCR@2023
ESI Discipline： CHEMISTRY;
ESI HC Threshold：226
JCR Journal Grade：1
CAS Journal Grade：2
Cited Count：
WoS CC Cited Count： 421
SCOPUS Cited Count： 400
ESI Highly Cited Papers on the List： 38 Unfold All
WanFang Cited Count：
Chinese Cited Count：
30 Days PV： 1
Affiliated Colleges：
