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

Kód výsledku v 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>

Výsledek na webu

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

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

MATERIALS LETTERS

ISSN

0167-577X

e-ISSN

1873-4979

Svazek periodika

1

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

20

Strana od-do

1-20

Kód UT WoS článku

000000000000100

EID výsledku v databázi Scopus

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