Exfoliation of hexagonal boron nitride nanosheets in low-modulus\nconcentrated alkali silicate pastes

0542307 - ÚFM 2022 RIV NL eng J - Článek v odborném periodiku
Bertolla, Luca - Šulák, Ivo - Buršík, Jiří - Dlouhý, Ivo - Smilek, J. - Mácová, Petra - Holas, J.
Exfoliation of hexagonal boron nitride nanosheets in low-modulus
concentrated alkali silicate pastes.
Materials Letters. Roč. 292, JUN (2021), č. článku 129551. ISSN 0167-577X. E-ISSN 1873-4979
Grant CEP: GA MŠMT(CZ) LQ1601
Institucionální podpora: RVO:68081723 ; RVO:68378297
Klíčová slova: Ceramics * Nanoparticles * BNNSs * Alkali silicate
Obor OECD: Ceramics; Ceramics (UTAM-F)
Impakt faktor: 3.574, rok: 2021
Způsob publikování: Omezený přístup
https://www.sciencedirect.com/science/article/pii/S0167577X21002470?via%3Dihub

We herein demonstrated the exfoliation of hexagonal boron nitride (h-BN) into nanosheets (BNNSs) by using concentrated low-modulus water glass (WG, SiO2/Na2O ratio = 1.6) as high viscosity exfoliating medium. The process led to BNNSs yield of nearly 30%. As the sheared suspension was neutralized with HCl, BNNSs with lateral size of approximately 250 nm and narrow size distribution, were found to align into perfectly parallel rows. High-resolution transmission electron microscopy (HR-TEM) analysis confirmed how WG preserved the integrity of the exfoliated BNNS in comparison with an analogous route with sole hydroxide, resulting in a high amount of BNNSs with undamaged structure. (C) 2021 Published by Elsevier B.V.
Trvalý link: http://hdl.handle.net/11104/0319794