Biopolymer supported silicon carbide for enhanced photocatalytic hydrogen evolution reaction

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Erişim
info:eu-repo/semantics/closedAccessTarih
2025Yazar
Genç, Münevver TunaSarılmaz, Adem
Aslan, Emre
Özel, Faruk
Potrich, Cristina
Ersöz, Mustafa
Patir, Imren Hatay
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Genc, M. T., Sarilmaz, A., Aslan, E., Ozel, F., Potrich, C., Ersoz, M., & Patir, I. H. (2025). Biopolymer supported silicon carbide for enhanced photocatalytic hydrogen evolution reaction. Chemical Engineering Science, 316, 122019. https://doi.org/10.1016/j.ces.2025.122019Özet
In photocatalytic hydrogen evolution reactions, SiC catalyst was templated with biopolymers (cellulose, chitin, chitosan, sodium alginate) in a reaction medium containing eosin Y dye and triethanolamine. Biopolymers act as biotemplate and mediator, provide easy dispersion, hydrophilicity, morphological transformation and adhesion to semiconductor with the help of functional groups. The photo-deposition of MoSx and Pt in aqueous solution is performed on biopolymer-SiC nanocomposite to obtain biopolymer-SiC/MoSx and biopolymer-SiC/Pt by reducing (NH4)2MoS4 and H2PtCl6·6H2O, respectively. Sodium alginate-SiC/MoSx showed highest photocatalytic activity which is approximately 158-, 34- and 13 times higher than bare SiC, bare sodium alginate and sodium alginate-SiC catalyst, respectively. Moreover, the solar-to-hydrogen efficiencies are achieved about 19.83% under solar light irradiation for the sodium alginate-SiC/MoSx catalyst. In addition, photo-deposited MoSx and Pt on biopolymer-SiC nanocomposite resulted in enhanced photocatalytic activity and stability because of increased active sites and enhanced electron transfer ability due to the co-catalyst effect.