TY - JOUR

T1 - The Roles of Impurities and Surface Area on Thermal Stability and Oxidation Resistance of BN Nanoplatelets

AU - Kostoglou, Nikolaos

AU - Stock, Sebastian

AU - Solomi, Angelos

AU - Holzapfel, Damian M.

AU - Hinder, Steven J.

AU - Baker, Mark

AU - Constantinides, Georgios

AU - Ryzhkov, Vladislav

AU - Maletaskic, Jelena

AU - Matovic, Branko

AU - Schneider, Jochen M.

AU - Rebholz, Claus

AU - Mitterer, Christian

N1 - Publisher Copyright: © 2024 by the authors.

PY - 2024/3/28

Y1 - 2024/3/28

N2 - This study considers the influence of purity and surface area on the thermal and oxidation properties of hexagonal boron nitride (h-BN) nanoplatelets, which represent crucial factors in high-temperature oxidizing environments. Three h-BN nanoplatelet-based materials, synthesized with different purity levels and surface areas (~3, ~56, and ~140 m 2/g), were compared, including a commercial BN reference. All materials were systematically analyzed by various characterization techniques, including gas pycnometry, scanning electron microscopy, X-ray diffraction, Fourier-transform infrared radiation, X-ray photoelectron spectroscopy, gas sorption analysis, and thermal gravimetric analysis coupled with differential scanning calorimetry. Results indicated that the thermal stability and oxidation resistance of the synthesized materials were improved by up to ~13.5% (or by 120 °C) with an increase in purity. Furthermore, the reference material with its high purity and low surface area (~4 m 2/g) showed superior performance, which was attributed to the minimized reactive sites for oxygen diffusion due to lower surface area availability and fewer possible defects, highlighting the critical roles of both sample purity and accessible surface area in h-BN thermo-oxidative stability. These findings highlight the importance of focusing on purity and surface area control in developing BN-based nanomaterials, offering a path to enhance their performance in extreme thermal and oxidative conditions.

AB - This study considers the influence of purity and surface area on the thermal and oxidation properties of hexagonal boron nitride (h-BN) nanoplatelets, which represent crucial factors in high-temperature oxidizing environments. Three h-BN nanoplatelet-based materials, synthesized with different purity levels and surface areas (~3, ~56, and ~140 m 2/g), were compared, including a commercial BN reference. All materials were systematically analyzed by various characterization techniques, including gas pycnometry, scanning electron microscopy, X-ray diffraction, Fourier-transform infrared radiation, X-ray photoelectron spectroscopy, gas sorption analysis, and thermal gravimetric analysis coupled with differential scanning calorimetry. Results indicated that the thermal stability and oxidation resistance of the synthesized materials were improved by up to ~13.5% (or by 120 °C) with an increase in purity. Furthermore, the reference material with its high purity and low surface area (~4 m 2/g) showed superior performance, which was attributed to the minimized reactive sites for oxygen diffusion due to lower surface area availability and fewer possible defects, highlighting the critical roles of both sample purity and accessible surface area in h-BN thermo-oxidative stability. These findings highlight the importance of focusing on purity and surface area control in developing BN-based nanomaterials, offering a path to enhance their performance in extreme thermal and oxidative conditions.

KW - hexagonal boron nitride

KW - nanomaterials

KW - nanoplatelets

KW - nanostructures

KW - oxidation resistance

KW - purity

KW - surface area

KW - thermal stability

UR - http://www.scopus.com/inward/record.url?scp=85190108700&partnerID=8YFLogxK

U2 - 10.3390/nano14070601

DO - 10.3390/nano14070601

M3 - Article

VL - 14.2024

JO - Nanomaterials

JF - Nanomaterials

SN - 2079-4991

IS - 7

M1 - 601

ER -