Platinum Nanoparticles Obtained at Mild Conditions on S-Layer Protein/Polymer Particle Supports

HUGGIAS, SOFÍA; BOLLA, PATRICIA A.; SERRADELL, MARÍA A.; CASELLA, MÓNICA; PERUZZO, PABLO J.

LANGMUIR

AMER CHEMICAL SOC

Año: 2020 vol. 36 p. 1201 - 1211

0743-7463

This work presents the synthesis of platinum nanoparticles supported on S-layer5 protein/polymeric particle systems, obtained by combining proteins isolated from Lactobacillus6 kefiri and an aqueous dispersion of acrylic particles. FTIR spectra of the protein/polymer7 supports did not show changes in the Amide I band of the proteins, suggesting that proteins8 maintained their conformation after adsorption. The SAXS spectra and DLS results are9 consistent with the formation of a protein corona around the polymer particles. After10 combining the supports with the platinum complex and subsequently reducing the combination11 with hydrogen at mild conditions, we obtained colloidal nanocomposite materials. In these,12 platinum nanoparticles with diameters around 3 nm located on the surface of the protein/13 polymer supports were observed by TEM. The obtained nanosystems showed catalytic activity14 in the reduction of p-nitrophenol with NaBH4 at room temperature with conversions of 100%15 for reaction times of 50 to 70 min.