CuAu bimetallic plasmonic-enhanced catalysts supported on alginate biohydrogels. (1st December 2022)

• Record Type: Journal Article
• Authors: Ramírez, Oscar; Bonardd, Sebastian; Saldías, César; Zambrano, Yadira; Díaz, David Díaz; Leiva, Angel
• Is Part Of: Carbohydrate polymers. Volume 297(2022)
• Publication Date: 2022-12-01
• Subjects: Bio-based hydrogel -- Bimetallic nanoparticles -- Surface plasmon resonance -- Plasmonic catalysis; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2022.120021
• Languages: English
• ISSNs: 0144-8617

Abstract

Abstract: We describe the synthesis, characterization and catalytic properties of a series of hybrid materials composed of inorganic plasmonic mono- and bimetallic nanoparticles supported on organic bio-based hydrogel beads. The bimetallic materials showed a localized surface plasmon resonance in the visible region, with a maximum light absorption correlated to the metal composition of the alloyed systems. Thermogravimetric analysis revealed a total water content near to 90 % w/w, which was in good agreement with the free-volume calculated from μCT scan reconstruction of lyophilized samples. Catalytic essays for the reduction of 4-nitrophenol demonstrated that alginate beads loaded with bimetallic nanoparticles exhibit a 5.4-fold higher apparent kinetic constant (kapp ) than its monometallic counterparts. Additionally, taking advantage of the plasmonic properties given by the nanoparticles is that the materials were tested as photocatalysts. The activity of the catalysts was enhanced by near 2.2 times higher in comparison with its performance in dark conditions. Graphical abstract: Unlabelled Image