Journal
MATERIALS LETTERS
Volume 292, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2021.129551
Keywords
Ceramics; Nanoparticles; BNNSs; Alkali silicate
Funding
- Ministry of Education, Youth and Sports of the Czech Republic under the project CEITEC 2020 [LQ1601]
- MEYS CR [LM2018110]
- project ITAM CAS [RVO 68378297]
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In this study, hexagonal boron nitride (h-BN) was successfully exfoliated into nanosheets using concentrated low-modulus water glass, resulting in a yield of nearly 30% BNNSs. The BNNSs obtained had lateral sizes of approximately 250 nm and narrow size distribution, aligning into parallel rows. High-resolution transmission electron microscopy (HR-TEM) analysis confirmed the integrity of exfoliated BNNSs preserved by water glass, leading to a high amount of undamaged structure BNNSs.
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.
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