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Boron nitride colloidal solutions, ultralight aerogels and freestanding membranes through one-step exfoliation and functionalization

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journal contribution
posted on 01.11.2015, 00:00 authored by Weiwei LeiWeiwei Lei, V N Mochalin, Dan LiuDan Liu, Alex QinAlex Qin, Y Gogotsi, Ying (Ian) ChenYing (Ian) Chen
Manufacturing of aerogels and membranes from hexagonal boron nitride (h-BN) is much more difficult than from graphene or graphene oxides because of the poor dispersibility of h-BN in water, which limits its exfoliation and preparation of colloidal solutions. Here, a simple, one-step mechano-chemical process to exfoliate and functionalize h-BN into highly water-dispersible, few-layer h-BN containing amino groups is presented. The colloidal solutions of few-layer h-BN can have unprecedentedly high concentrations, up to 30 mg ml(-1), and are stable for up to several months. They can be used to produce ultralight aerogels with a density of 1.4 mg cm(-3), which is ∼1,500 times less than bulk h-BN, and freestanding membranes simply by cryodrying and filtration, respectively. The material shows strong blue light emission under ultraviolet excitation, in both dispersed and dry state.

History

Journal

Nature communications

Volume

6

Article number

8849

Pagination

1 - 8

Publisher

Nature Publishing Group

Location

London, Eng.

eISSN

2041-1723

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2015, The Authors