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Efficient and Green Synthesis of SiOC Nanoparticles at Near-Ambient Conditions by Liquid-Phase Plasma

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journal contribution
posted on 31.05.2021, 11:33 by Zhiqiang Chen, Jieming Wang, Iuliia Onyshchenko, Yichao Wang, Christophe Leys, Anton Nikiforov, Weiwei Lei
Si-based ceramics such as silicon oxycarbide (SiOC) exhibit inimitable electrical, thermal, chemical, mechanical, and biological properties and have attracted interest for a wide range of technological applications. Recently, considerable efforts have been made to improve the conventional approach to produce Si-based ceramics that requires extreme environments and cannot be directly used to form the particles on a nanosize scale. In this study, we demonstrate that SiOC nanoparticles (NPs) with a crystalline phase can be synthesized at atmospheric pressure in a gas bubble discharge in liquid hexamethyldisiloxane. The as-prepared nanoparticles exhibit a carbon-free and highly crystalline structure of SiC. The mechanism of the formation of SiOC NPs was systematically studied, providing an in-depth understanding of the formation of SiOC NPs and insight on the way to control the structures of Si-based ceramic NPs. This novel approach offers a simple, efficient, and green route for the production of SiOC NPs and has great potential to produce such nanomaterials on a large scale.