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Functionalization and Dispersion of Hexagonal Boron Nitride (h‐BN) Nanosheets Treated with Inorganic Reagents
Author(s) -
Nazarov Albert S.,
Demin Viktor N.,
Grayfer Ekaterina D.,
Bulavchenko Alexander I.,
Arymbaeva Aida T.,
Shin HyeonJin,
Choi JaeYoung,
Fedorov Vladimir E.
Publication year - 2012
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201100710
Subject(s) - x ray photoelectron spectroscopy , materials science , surface modification , scanning electron microscope , raman spectroscopy , dynamic light scattering , exfoliation joint , boron nitride , chemical engineering , transmission electron microscopy , spectroscopy , analytical chemistry (journal) , crystallography , nanotechnology , chemistry , nanoparticle , graphene , organic chemistry , composite material , physics , optics , quantum mechanics , engineering
A mixture of bulk hexagonal boron nitride (h‐BN) with hydrazine, 30 % H 2 O 2 , HNO 3 /H 2 SO 4 , or oleum was heated in an autoclave at 100 °C to produce functionalized h‐BN. The product formed stable colloid solutions in water (0.26–0.32 g L −1 ) and N , N ‐dimethylformamide (0.34–0.52 g L −1 ) upon mild ultrasonication. The yield of “soluble” h‐BN reached about 70 wt %. The dispersions contained few‐layered h‐BN nanosheets with lateral dimensions in the order of several hundred nanometers. The functionalized dispersible h‐BN was characterized by IR spectroscopy, X‐ray photoelectron spectroscopy (XPS), Raman spectroscopy, UV/Vis spectroscopy, X‐ray diffraction (XRD), dynamic light scattering (DLS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atomic force microscopy (AFM). It is shown that h‐BN preserves its hexagonal structure throughout the functionalization procedure. Its exfoliation into thin platelets upon contact with solvents is probably owing to the attachment of hydrophilic functionalities.