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High‐Yield and Damage‐free Exfoliation of Layered Graphdiyne in Aqueous Phase
Author(s) -
Yan Hailong,
Yu Ping,
Han Guangchao,
Zhang Qinghua,
Gu Lin,
Yi Yuanping,
Liu Huibiao,
Li Yuliang,
Mao Lanqun
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201809730
Subject(s) - exfoliation joint , raman spectroscopy , x ray photoelectron spectroscopy , materials science , aqueous solution , scanning electron microscope , transmission electron microscopy , fourier transform infrared spectroscopy , yield (engineering) , phase (matter) , high resolution transmission electron microscopy , analytical chemistry (journal) , graphene , chemical engineering , chemistry , nanotechnology , composite material , optics , organic chemistry , physics , engineering
The two‐dimensional carbon material graphdiyne (GDY) holds great promise as a semiconductor and porous material, however, exfoliation of bulk GDY into single‐ or few‐layered GDY in the aqueous phase remains a challenge. We report an efficient method for the damage‐free exfoliation of bulk GDY into single‐ or few‐layered GDY with high yield in an aqueous solution of inorganic salts (e.g., Li 2 SiF 6 ). This was confirmed by spherical‐aberration‐corrected scanning transmission electron microscopy, scanning/transmission electron microscopy, atomic force microscopy, Fourier transform infrared/Raman spectroscopy, X‐ray photoelectron spectroscopy. The method gives high exfoliation efficiency (75 wt %) without creating additional structural defects or oxides in the exfoliated GDY. Theoretical calculations suggest that non‐covalent adsorption of the anion, diffusion of the cation, and subsequent repulsive forces between adjacent flakes are the main driving force for the efficient exfoliation.