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Fibrous SiC-based Mesoporous Solids for the Photocatalytic Degradation of Organic Pollutants under Artificial Light

Photocatalysis: Research and Potential. 2024, 1(2), 10006; https://doi.org/10.35534/prp.2023.10006
Karla B. Cervantes-Diaz    Julien Cambedouzou *   
Institut Européen des Membranes (IEM), Univ. Montpellier, CNRS, ENSCM, 34095 Montpellier, France
*
Authors to whom correspondence should be addressed.

Received: 06 Jun 2023    Accepted: 03 Oct 2023    Published: 11 Oct 2023   

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Abstract

SiC-based mesoporous solids with fibrous nanostructure were prepared by impregnation of a polycarbosilane precursor on annealed polyacrylonitrile (PAN) fibers and subsequent pyrolysis. The obtained material exhibits a mesoporous structure and has a specific surface area of ~20 m2/g. It has a semiconducting electronic character with a bandgap of 2.65 eV, i.e., in the visible range. Adsorption tests of methylene blue were performed on the material under dark conditions, which showed an adsorption amount of 78 wt%. The photocatalytic activity of the material was then evaluated for the degradation of the dye under artificial daylight irradiation over a period of 7 h. A degradation of 94 wt% was achieved. Regeneration and reuse of the material was also tested and resulted in 97 wt% degradation after reuse, indicating potential interest of the material as a contactor in environmental remediation devices.

Keywords

Silicon carbide; Preceramic polymers; Ceramics; Photocatalysis; Fibers

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