Issue 50, 2021

Methods of hexagonal boron nitride exfoliation and its functionalization: covalent and non-covalent approaches

Abstract

The exfoliation of two-dimensional (2D) hexagonal boron nitride nanosheets (h-BNNSs) from bulk hexagonal boron nitride (h-BN) materials has received intense interest owing to their fascinating physical, chemical, and biological properties. Numerous exfoliation techniques offer scalable approaches for harvesting single-layer or few-layer h-BNNSs. Their structure is very comparable to graphite, and they have numerous significant applications owing to their superb thermal, electrical, optical, and mechanical performance. Exfoliation from bulk stacked h-BN is the most cost-effective way to obtain large quantities of few layer h-BN. Herein, numerous methods have been discussed to achieve the exfoliation of h-BN, each with advantages and disadvantages. Herein, we describe the existing exfoliation methods used to fabricate single-layer materials. Besides exfoliation methods, various functionalization methods, such as covalent, non-covalent, and Lewis acid–base approaches, including physical and chemical methods, are extensively described for the preparation of several h-BNNS derivatives. Moreover, the unique and potent characteristics of functionalized h-BNNSs, like enhanced solubility in water, improved thermal conductivity, stability, and excellent biocompatibility, lead to certain extensive applications in the areas of biomedical science, electronics, novel polymeric composites, and UV photodetectors, and these are also highlighted.

Graphical abstract: Methods of hexagonal boron nitride exfoliation and its functionalization: covalent and non-covalent approaches

Article information

Article type
Review Article
Submitted
27 Jūl. 2021
Accepted
26 Aug. 2021
First published
23 Sept. 2021
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2021,11, 31284-31327

Methods of hexagonal boron nitride exfoliation and its functionalization: covalent and non-covalent approaches

C. Gautam and S. Chelliah, RSC Adv., 2021, 11, 31284 DOI: 10.1039/D1RA05727H

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