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Nano Research

Article Title

Highly accessible aqueous synthesis of well-dispersed dendrimer type platinum nanoparticles and their catalytic applications

Authors

Adrián Fernández-Lodeiro, BIOSCOPE Group, LAQV@REQUIMTE, Chemistry Department, Faculty of Science and Technology, University NOVA of Lisbon, Caparica Campus, Caparica 2829-516, Portugal PROTEOMASS Scientific Society, Rúa dos Inventores, Madan Parque, Caparica Campus, Caparica 2829-516, Portugal
Jamila Djafari, BIOSCOPE Group, LAQV@REQUIMTE, Chemistry Department, Faculty of Science and Technology, University NOVA of Lisbon, Caparica Campus, Caparica 2829-516, Portugal PROTEOMASS Scientific Society, Rúa dos Inventores, Madan Parque, Caparica Campus, Caparica 2829-516, Portugal
David Lopez-Tejedor, Department of Biocatalysis, Institute of Catalysis (CSIC), Madrid, Spain; Marie Curie 2, Cantoblanco, UAM Campus, Madrid 28049, Spain
Carlos Perez-Rizquez, Department of Biocatalysis, Institute of Catalysis (CSIC), Madrid, Spain; Marie Curie 2, Cantoblanco, UAM Campus, Madrid 28049, Spain
Benito Rodríguez-González, Scientific and Technological Research Assistance Center (CACTI), University of Vigo, Lagoas-Marcosende, Vigo 36310, Spain
José Luis Capelo, BIOSCOPE Group, LAQV@REQUIMTE, Chemistry Department, Faculty of Science and Technology, University NOVA of Lisbon, Caparica Campus, Caparica 2829-516, Portugal PROTEOMASS Scientific Society, Rúa dos Inventores, Madan Parque, Caparica Campus, Caparica 2829-516, Portugal
Jose M. Palomo, Department of Biocatalysis, Institute of Catalysis (CSIC), Madrid, Spain; Marie Curie 2, Cantoblanco, UAM Campus, Madrid 28049, Spain
Carlos Lodeiro, BIOSCOPE Group, LAQV@REQUIMTE, Chemistry Department, Faculty of Science and Technology, University NOVA of Lisbon, Caparica Campus, Caparica 2829-516, Portugal PROTEOMASS Scientific Society, Rúa dos Inventores, Madan Parque, Caparica Campus, Caparica 2829-516, Portugal
Javier Fernández-Lodeiro, BIOSCOPE Group, LAQV@REQUIMTE, Chemistry Department, Faculty of Science and Technology, University NOVA of Lisbon, Caparica Campus, Caparica 2829-516, Portugal PROTEOMASS Scientific Society, Rúa dos Inventores, Madan Parque, Caparica Campus, Caparica 2829-516, Portugal

Keywords

platinum dendrimer NPs, catalytic application, green synthesis, catechol oxidase-like activity

Abstract

The application of novel methodologies to the synthesis of nanomaterials is still a challenge in many different technological and scientific fields. New efficient and reproducible synthetic methodologies, that produce fewer residues and reduce the cost of raw materials must be developed. In the present work, we have explored the attractive possibility to apply the cheap iron (II) sulphate salt in the reduction process of the K2PtCl4 to produce colloids suspensions. The synthesis took places in water and was assisted by sodium citrate (SC) using polyvinylpyrrolidone (PVP) as a surfactant. The adjustment of this novelty process allows obtaining well-dispersed and sub-20 nm dendrimer-type platinum nanoparticles (Pt D-NPs). The nano-dendrimers produced have been characterized using dynamic light scattering (DLS), transmission electron microscopy (TEM), high-resolution TEM (HR-TEM), XRD spectroscopy, inductive couple plasma (ICP) analysis, Fourier transform infrared (FT-IR) and ultraviolet–visible (UV–vis) spectroscopy. Interesting conformational results derived from the size and shape will be discussed. Catalytic application of the Pt D-NPs has been explored in the reduction of p-nitrophenol (p-NP) to p-aminophenol (p-AP) in aqueous media at room temperature obtained TOF value of 253 min−1. Finally, our Pt D-NPs were tested as artificial metalloenzyme showing catechol oxidase activity for oxidation of L-DOPA.

Graphical Abstract

Publisher

Tsinghua University Press

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