Ramirez, Oscar and Bonardd, Sebastian and Saldias, Cesar and Zambrano, Yadira and Diaz Diaz, David and Leiva, Angel (2022) CuAu bimetallic plasmonic-enhanced catalysts supported on alginate biohydrogels. CARBOHYDRATE POLYMERS, 297: 120021. ISSN 0144-8617, 1879-1344
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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 mu CT 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 (k(app)) 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.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | COPPER NANOPARTICLES; SILVER NANOPARTICLES; METAL NANOPARTICLES; ALLOY NANOPARTICLES; OXIDE NANOPARTICLES; GOLD NANOPARTICLES; GREEN SYNTHESIS; PHOTOCATALYSIS; POLYMERS; NANOCOMPOSITES; Bio-based hydrogel; Bimetallic nanoparticles; Surface plasmon resonance; Plasmonic catalysis |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Organische Chemie Chemistry and Pharmacy > Institut für Organische Chemie > Arbeitskreis Prof. Dr. David Díaz Díaz |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 26 Jan 2024 12:15 |
| Last Modified: | 29 Jan 2024 13:21 |
| URI: | https://pred.uni-regensburg.de/id/eprint/58295 |
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