Functionalization and Dispersion of Hexagonal Boron Nitride (h‐BN) Nanosheets Treated with Inorganic Reagents |
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Authors: | Dr. Albert S. Nazarov Dr. Viktor N. Demin Ekaterina D. Grayfer Dr. Alexander I. Bulavchenko Dr. Aida T. Arymbaeva Dr. Hyeon‐Jin Shin Dr. Jae‐Young Choi Prof. Dr. Vladimir E. Fedorov |
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Affiliation: | 1. Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, 3, Acad. Lavrentiev Ave., Novosibirsk 630090 (Russia), Fax: (+7)?383‐3309489;2. Samsung Advanced Institute of Technology, Yongin, Gyeonggi, 446‐712 (Korea) |
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Abstract: | A mixture of bulk hexagonal boron nitride (h‐BN) with hydrazine, 30 % H2O2, HNO3/H2SO4, 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. |
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Keywords: | boron boron nitride colloids nanoparticles nanosheets |
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