期刊
CARBOHYDRATE POLYMERS
卷 297, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2022.120021
关键词
Bio-based hydrogel; Bimetallic nanoparticles; Surface plasmon resonance; Plasmonic catalysis
资金
- Beca doctorado nacional ANID [21191002]
- MINECO [FJC2019-039515-I]
- Spanish Government [PID2019-105391GB-C21/AEI/10.13039/501100011033]
- Fondecyt [1211022, 1211124]
- FONDAP [15110019]
In this study, a series of hybrid materials composed of inorganic plasmonic mono- and bimetallic nanoparticles supported on organic bio-based hydrogel beads were synthesized and characterized. The bimetallic materials exhibited a localized surface plasmon resonance in the visible region and showed higher catalytic activity compared to the monometallic counterparts. Furthermore, the materials also demonstrated enhanced photocatalytic properties.
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.
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