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Photocatalytic hydrogen generation from a methanol–water mixture in the presence of g-C3N4 and graphene/g-C3N4.
- Source :
- New Journal of Chemistry; 11/21/2022, Vol. 46 Issue 43, p20679-20690, 12p
- Publication Year :
- 2022
-
Abstract
- Graphitic carbon nitride (g-C<subscript>3</subscript>N<subscript>4</subscript>), 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-C<subscript>3</subscript>N<subscript>4</subscript> were synthesised from different precursors (melamine and urea). Moreover, the surface of bulk g-C<subscript>3</subscript>N<subscript>4</subscript> and exfoliated g-C<subscript>3</subscript>N<subscript>4</subscript> was modified with graphene (0.5 wt% and 1 wt%) aiming to obtain a prolonged carrier lifetime. The effect of g-C<subscript>3</subscript>N<subscript>4</subscript> 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 CH<subscript>4</subscript> and CO resulting from the reduction of CO<subscript>2</subscript> 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]
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 46
- Issue :
- 43
- Database :
- Complementary Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 160064155
- Full Text :
- https://doi.org/10.1039/d2nj04275d