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Issue 11, 2015
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Two-dimensional covalent carbon nitride nanosheets: synthesis, functionalization, and applications

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Abstract

The development of new layered materials has experienced an evolution from graphene to metal oxide and metal chalcogenide nanosheets, and more recently to two-dimensional (2D) covalent organic frameworks, such as conjugated carbon nitride nanosheets (CNNs) with a spectral gap in the band structure. The anisotropic 2D geometric morphology, together with the aromatic π-conjugated framework, endows polymeric CNNs with unique properties, such as an enlarged surface area with a highly opened-up flat structure, reduced thickness with enhanced electron mobility and with intrinsic semiconductive features, which support their attractive bandgap- and surface-engineered applications ranging from energy-related topics to other new emerging fields. In this review, recent research advances in the establishment of two synthetic strategies for CNNs are firstly overviewed, namely, the top-down delamination of graphitic carbon nitride (CN) solids and the bottom-up assembly of molecular building blocks in a 2D manner. Efficient approaches aimed at advancing CNNs for target-specific applications, including hybridizing, doping, sensitization, copolymerization and nanorefinement, are also described as possible solutions.

Graphical abstract: Two-dimensional covalent carbon nitride nanosheets: synthesis, functionalization, and applications

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Article information


Submitted
20 Jun 2015
Accepted
30 Jul 2015
First published
30 Jul 2015

Energy Environ. Sci., 2015,8, 3092-3108
Article type
Review Article

Two-dimensional covalent carbon nitride nanosheets: synthesis, functionalization, and applications

J. Zhang, Y. Chen and X. Wang, Energy Environ. Sci., 2015, 8, 3092
DOI: 10.1039/C5EE01895A

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