材料科学
石墨烯
烷基化
硼
六方晶系
纳米技术
六方氮化硼
化学工程
氮化硼
催化作用
有机化学
化学
结晶学
工程类
作者
Carlos A. de los Reyes,Katharyn Hernández,Cecilia Martínez-Jiménez,Kendahl L. Walz Mitra,Cedric J. Ginestra,Ashleigh D. Smith McWilliams,Matteo Pasquali,Ángel A. Martí
标识
DOI:10.1021/acs.jpcc.9b05416
摘要
Hexagonal boron nitride (h-BN), also known as white graphene, presents an unparalleled combination of properties, including superior mechanical strength, good thermal conductivity, a wide band gap, and chemical and thermal inertness. However, because of its aversion to chemical modification, its applications have not progressed as much as those of carbon nanomaterials. In this manuscript, we show the functionalization of hexagonal boron nitride using alkyl halides in strongly reducing conditions (Billups–Birch conditions). The tunability of the Billups–Birch reaction is demonstrated by alkylating hexagonal boron nitride with 1-bromododecane and varying equivalents of Li to BN. We found that using a 1:20 BN/Li ratio yields the highest chemical modification, as demonstrated using thermogravimetric analysis and Fourier transform infrared spectroscopy, and supported by X-ray photoelectron spectroscopy. Imaging of the functionalized h-BN (fh-BN) revealed that its sheets exfoliate better in isopropanol than pristine h-BN, which displays highly stacked nanostructures. Moreover, bearing alkyl chains confers the nanosheets with improved dispersibility in nonpolar solvents, such as dodecane, and allows the formation of hydrophobic films.
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