Kontaktujte nás | Jazyk: čeština English
Název: | Highly catalytically active composite of palladium nanoparticles covalently bound to chitosan nanofibers via dialdehyde cellulose | ||||||||||
Autor: | Hrbáček, Vítek; Důbravová, Alžběta; Muchová, Monika; Humpolíček, Petr; Kuřitka, Ivo; Vícha, Jan; Münster, Lukas | ||||||||||
Typ dokumentu: | Recenzovaný odborný článek (English) | ||||||||||
Zdrojový dok.: | International Journal of Biological Macromolecules. 2025, vol. 291 | ||||||||||
ISSN: | 0141-8130 (Sherpa/RoMEO, JCR) | ||||||||||
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DOI: | https://doi.org/10.1016/j.ijbiomac.2024.138801 | ||||||||||
Abstrakt: | This study introduces a novel, sustainable method for synthesizing sub-5 nm palladium nanoparticles (PdNPs) and covalently binding them to chitosan nanofibers (CHITs) using fully oxidized dialdehyde cellulose (DAC). Notably, the DAC acts not only as a reducing and stabilizing agent for PdNPs, but also as a linker for their rapid and spontaneous covalent attachment to CHITs via Schiff base chemistry. This unique approach yields PdNPs with a narrow size distribution (4.7 ± 0.4 nm) and enables the preparation of a stable nanofibrous composite with excellent catalytic efficiency for 4-nitrophenol reduction (TOFPdNPs = 75.2 min−1, kPdNPs = 1.34 min−1; TOFPdNPs-CHIT = 1.18 min−1). The composite's high reusability, attributed to strong covalent binding, marks a significant improvement over traditional PdNPs composites that rely on weak interactions. This is demonstrated on a model of a catalytic device, reflecting industrial applications. | ||||||||||
Plný text: | https://www.sciencedirect.com/science/article/pii/S0141813024096120 | ||||||||||
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