1. Photocatalytic hydrogen generation from a methanol–water mixture in the presence of g-C3N4 and graphene/g-C3N4.
- Author
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Touati, Wassila, Karmaoui, Mohamed, Bekka, Ahmed, Edelmannová, Miroslava Filip, Furgeaud, Clarisse, Chakib, Alaoui, Allah, Imene kadi, Figueiredo, Bruno, Labrincha, J. A., Arenal, Raul, Koci, Kamila, and Tobaldi, David Maria
- Subjects
INTERSTITIAL hydrogen generation ,BAND gaps ,CHEMICAL stability ,PHOTOCATALYSTS ,CARBON monoxide - Abstract
Graphitic carbon nitride (g-C
3 N4 ), possessing high thermal and chemical stability, non-toxicity, facile synthesis, and low band gap energy is a promising candidate for photocatalytic applications. In this study, bulk and exfoliated g-C3 N4 were synthesised from different precursors (melamine and urea). Moreover, the surface of bulk g-C3 N4 and exfoliated g-C3 N4 was modified with graphene (0.5 wt% and 1 wt%) aiming to obtain a prolonged carrier lifetime. The effect of g-C3 N4 synthesis from various precursors and the influence of graphene content on the photocatalytic activity during the degradation of a water–methanol mixture under UVC irradiation were examined, in comparison to commercial P25. Hydrogen, methane and carbon monoxide were the decomposition products; hydrogen was the main product of decomposition, whereas CH4 and CO resulting from the reduction of CO2 were generated in a significantly smaller amount. All the produced photocatalysts, whether pure or modified with graphene, exhibited higher activity than the commercial photocatalyst P25. [ABSTRACT FROM AUTHOR]- Published
- 2022
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