Denatured proteins as a novel template for the synthesis of well-defined, ultra-stable and water-soluble metal nanostructures for catalytic applications / Chaojian Chen in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 2 (Année 2020)  

[article]  inJOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 2 (Année 2020) . - 11 p. Titre : Denatured proteins as a novel template for the synthesis of well-defined, ultra-stable and water-soluble metal nanostructures for catalytic applications Type de document : texte imprimé Auteurs : Chaojian Chen, Auteur ; David Yuen Wah Ng, Auteur ; Tanja Weil, Auteur Année de publication : 2020 Article en page(s) : 11 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Catalyse Nanoparticules Nanostructures Or Platine Protéines Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The templated synthesis of noble metal nanoparticles using biomass, such as proteins and polysaccharides, has generated great interest in recent years. In this work, we report on denatured proteins as a novel template for the preparation of water-soluble metal nanoparticles with excellent stability even after high speed centrifugation or storage at room temperature for one year. Different noble metal nanoparticles including spherical gold and platinum nanoparticles as well as gold nanoflowers are obtained using sodium borohydride or ascorbic acid as the reducing agent. The particle size can be controlled by the concentration of the template. These metal nanoparticles are further used as catalysts for the hydrogenation reaction of p-nitrophenol to p-aminophenol. Especially, spherical gold nanoparticles with an average size of 2 nm show remarkable catalytic performance with a rate constant of 1.026 × 10− 2 L s− 1 mg− 1. These metal nanoparticles with tunable size and shape have great potential for various applications such as catalysis, energy, sensing, and biomedicine. Note de contenu : - EXPERIMENTAL SECTION : Materials - Synthesis of cationic HSA (cHSA) - Preparation of PEGylated cHSA (PEG-cHSA) - Synthesis of denatured PEG-cHSA (PEG-dcHSA) - Synthesis of AuNPs using NaBH4 as the reducing agent - Synthesis of AuNFs using ascorbic acid as the reducing agent - Synthesis of PtNPs using NaBH4 as the reducing agent - Catalytic reduction of p-nitrophenol to p-aminophenol - Characterization - RESULTS AND DISCUSSION : Unfolding native proteins to well-defined biopolymers - Ultrasmall AuNPs prepared using NaBH4 as the reducing agent - AuNFs prepared using ascorbic acid as the reducing agent - Catalytical reduction of p-nitrophenol by Au nanostructures Synthesis of PtNPs and their catalytic performance - Table 1 : Conditions for the synthesis of ultrasmall AuNPs using NaBH4 as the reducing agent DOI : https://doi.org/10.1186/s42825-020-00020-5 En ligne : https://link.springer.com/content/pdf/10.1186/s42825-020-00020-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37331 [article]

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