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Nanosilver embedded on hydroxyapatite-encapsulated γ-Fe2O3: Superparamagnetic catalyst for chemoselective oxidation of primary amines to N-monoalkylated hydroxylamines

Paper ID Volume ID Publish Year Pages File Format Full-Text
41500 45891 2011 5 PDF Available
Title
Nanosilver embedded on hydroxyapatite-encapsulated γ-Fe2O3: Superparamagnetic catalyst for chemoselective oxidation of primary amines to N-monoalkylated hydroxylamines
Abstract

A novel magnetically recoverable silver nano-catalyst was fabricated by the adsorption–reduction of Ag (I) ions on the surface of hydroxyapatite encapsulated iron oxide nanoparticles. The magnetic catalyst could be easily separated by the application of an external magnetic field. The samples have been characterized by VSM, X-ray diffraction (XRD) and scanning and transmission electron microscopy (SEM and TEM), which reveal the superparamagnetic nano-nature of the particles. From these studies we can infer that the particles are mostly spherical in shape and have an average size of 10 nm. The catalytic ability of the Ag nanoparticles supported on the magnetic nanocarier was found to be excellent and they cleanly oxidize primary amines to N-monoalkylated hydroxylamines.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (128 K)Download as PowerPoint slideResearch highlights▶ The silver supported onto HAp-encapsulated-γ-Fe2O3 is an ideal biomaterial as magnetically recoverable catalyst. ▶ Chemoselective oxidation of primary amines. ▶ Clean, green and low-cost methodology in the oxidation of primary amines to N-monoalkylated hydroxylamines.

Keywords
Magnetically recoverable silver nano-catalyst; N-monoalkylated hydroxylamines; Hydroxyapatite encapsulated iron oxide nanoparticles; Oxidation of primary amines; Green chemistry
First Page Preview
Nanosilver embedded on hydroxyapatite-encapsulated γ-Fe2O3: Superparamagnetic catalyst for chemoselective oxidation of primary amines to N-monoalkylated hydroxylamines
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 395, Issues 1–2, 15 March 2011, Pages 34–38
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis