lei-boronnitridecolloidal-2015.pdf (3.87 MB)
Boron nitride colloidal solutions, ultralight aerogels and freestanding membranes through one-step exfoliation and functionalization
journal contribution
posted on 2015-11-01, 00:00 authored by Weiwei LeiWeiwei Lei, V N Mochalin, Dan LiuDan Liu, Alex QinAlex Qin, Y Gogotsi, Ying (Ian) ChenYing (Ian) ChenManufacturing 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 communicationsVolume
6Article number
8849Pagination
1 - 8Publisher
Nature Publishing GroupLocation
London, Eng.Publisher DOI
eISSN
2041-1723Language
engPublication classification
C Journal article; C1 Refereed article in a scholarly journalCopyright notice
2015, The AuthorsUsage metrics
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