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Tri‐ s ‐triazine‐Based Crystalline Carbon Nitride Nanosheets for an Improved Hydrogen Evolution
Author(s) -
Ou Honghui,
Lin Lihua,
Zheng Yun,
Yang Pengju,
Fang Yuanxing,
Wang Xinchen
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201700008
Subject(s) - triazine , materials science , carbon nitride , crystallinity , nitride , hydrogen production , carbon fibers , aqueous solution , 1,3,5 triazine , chemical engineering , nanotechnology , photocatalysis , hydrogen , methanol , organic chemistry , composite material , catalysis , polymer chemistry , chemistry , layer (electronics) , composite number , engineering
Tri‐ s ‐triazine‐based crystalline carbon nitride nanosheets (CCNNSs) have been successfully extracted via a conventional and cost‐effective sonication–centrifugation process. These CCNNSs possess a highly defined and unambiguous structure with minimal thickness, large aspect ratios, homogeneous tri‐ s ‐triazine‐based units, and high crystallinity. These tri‐ s ‐triazine‐based CCNNSs show significantly enhanced photocatalytic hydrogen generation activity under visible light than g‐C 3 N 4 , poly (triazine imide)/Li + Cl – , and bulk tri‐ s ‐triazine‐based crystalline carbon nitrides. A highly apparent quantum efficiency of 8.57% at 420 nm for hydrogen production from aqueous methanol feedstock can be achieved from tri‐ s ‐triazine‐based CCNNSs, exceeding most of the reported carbon nitride nanosheets. Benefiting from the inherent structure of 2D crystals, the ultrathin tri‐ s ‐triazine‐based CCNNSs provide a broad range of application prospects in the fields of bioimaging, and energy storage and conversion.