Exfoliation of hexagonal boron nitride nanosheets in low-modulus concentrated alkali silicate suspensions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F21%3APU140056" target="_blank" >RIV/00216305:26310/21:PU140056 - isvavai.cz</a>

Result on the web

<a href="https://www.fch.vut.cz/" target="_blank" >https://www.fch.vut.cz/</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Exfoliation of hexagonal boron nitride nanosheets in low-modulus concentrated alkali silicate suspensions

Original language description

This work elucidated for the first time the role of highly concentrated water glass (WG) paste as exfoliating media for the high-yield production of boron nitride nanosheets (BNNSs). By taking into account the difficulties related to BNNSs exfoliation and dispersion and the paucity of reports about highly viscous exfoliating media, the findings herein reported are of technological interest. The basic rheological characterization of the WG/boron nitride pastes evidenced a strong interfacial adhesion between these components, with generation of high shear stresses at shear rates far below those commonly reported in literature. A refinement step, with the aim to separate the exfoliated BNNSs from the silicate was successfully implemented. Beside a considerable Cover Letter BNNSs yield, calculated as nearly 30%, the method evidenced how, upon precipitation of the pastes with HCl, the exfoliated BNNSs bound to the newly formed NaCl crystals and self-assemble into perfectly aligned and parallel arrows. We believe that further development of the described method might have technological potential for the high yield production of high quality BNNSs, and could offer a hint to applications requiring ordered surface topography and narrow nanosheets size distribution. Its applicability could be extended to other two-dimensional layered materials.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10402 - Inorganic and nuclear chemistry

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

MATERIALS LETTERS

ISSN

0167-577X

e-ISSN

1873-4979

Volume of the periodical

1

Issue of the periodical within the volume

1

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

20

Pages from-to

1-20

UT code for WoS article

000000000000100

EID of the result in the Scopus database

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