Boron nitride colloidal solutions, ultralight aerogels and freestanding membranes through one-step exfoliation and functionalization
Data(s) |
01/11/2015
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Resumo |
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. |
Identificador | |
Idioma(s) |
eng |
Publicador |
Nature Publishing Group |
Relação |
DE150101617 DE140100716 http://dro.deakin.edu.au/eserv/DU:30080186/lei-boronnitridecolloidal-2015.pdf http://www.dx.doi.org/10.1038/ncomms9849 |
Direitos |
2015, The Authors |
Tipo |
Journal Article |