Synthesis and Catalytic Application of Silver Nanoparticles Supported on Lactobacillus kefiri S-Layer Proteins

Research on nanoparticles obtained on biological supports is a topic of growing interest in nanoscience, especially regarding catalytic applications. Silver nanoparticles (AgNPs) have been studied due to their low toxicity, but they tend to aggregation, oxidation, and low stability. In this work, we...

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Detalles Bibliográficos
Autores principales:	Bolla, Patricia Araceli, Huggias, Sofía, Serradell, María de los Ángeles, Ruggera, José Fernando, Casella, Mónica Laura
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2020
Materias:	Química Silver nanoparticles S-layer protein DFT Catalytic activity
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/118944
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-118944
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Química Silver nanoparticles S-layer protein DFT Catalytic activity
spellingShingle	Química Silver nanoparticles S-layer protein DFT Catalytic activity Bolla, Patricia Araceli Huggias, Sofía Serradell, María de los Ángeles Ruggera, José Fernando Casella, Mónica Laura Synthesis and Catalytic Application of Silver Nanoparticles Supported on Lactobacillus kefiri S-Layer Proteins
topic_facet	Química Silver nanoparticles S-layer protein DFT Catalytic activity
description	Research on nanoparticles obtained on biological supports is a topic of growing interest in nanoscience, especially regarding catalytic applications. Silver nanoparticles (AgNPs) have been studied due to their low toxicity, but they tend to aggregation, oxidation, and low stability. In this work, we synthesized and characterized AgNPs supported on S-layer proteins (SLPs) as bidimensional regularly arranged biotemplates. By di erent reduction strategies, six AgNPs of variable sizes were obtained on two di erent SLPs. Transmission electron microscopy (TEM) images showed that SLPs are mostly decorated by evenly distributed AgNPs; however, a drastic reduction by NaBH4 led to large AgNPs whereas a smooth reduction with H2 or H2/NaBH4 at low concentration leads to smaller AgNPs, regardless of the SLP used as support. All the nanosystems showed conversion values between 75–80% of p-nitrophenol to p-aminophenol, however, the increment in the AgNPs size led to a great decrease in Kapp showing the influence of reduction strategy in the performance of the catalysts. Density functional theory (DFT) calculations indicated that the adsorption of p-nitrophenolate species through the nitro group is the most favored mechanism, leading to p-aminophenol as the only feasible product of the reaction, which was corroborated experimentally.
format	Articulo Articulo
author	Bolla, Patricia Araceli Huggias, Sofía Serradell, María de los Ángeles Ruggera, José Fernando Casella, Mónica Laura
author_facet	Bolla, Patricia Araceli Huggias, Sofía Serradell, María de los Ángeles Ruggera, José Fernando Casella, Mónica Laura
author_sort	Bolla, Patricia Araceli
title	Synthesis and Catalytic Application of Silver Nanoparticles Supported on Lactobacillus kefiri S-Layer Proteins
title_short	Synthesis and Catalytic Application of Silver Nanoparticles Supported on Lactobacillus kefiri S-Layer Proteins
title_full	Synthesis and Catalytic Application of Silver Nanoparticles Supported on Lactobacillus kefiri S-Layer Proteins
title_fullStr	Synthesis and Catalytic Application of Silver Nanoparticles Supported on Lactobacillus kefiri S-Layer Proteins
title_full_unstemmed	Synthesis and Catalytic Application of Silver Nanoparticles Supported on Lactobacillus kefiri S-Layer Proteins
title_sort	synthesis and catalytic application of silver nanoparticles supported on lactobacillus kefiri s-layer proteins
publishDate	2020
url	http://sedici.unlp.edu.ar/handle/10915/118944
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bdutipo_str	Repositorios
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Synthesis and Catalytic Application of Silver Nanoparticles Supported on Lactobacillus kefiri S-Layer Proteins

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