Preparation and characterization of magnetic chlorochromate hybrid nanomaterials with triphenylphosphine surface-modified iron oxide nanoparticles

Ali Maleki,Rahmatollah Rahimi,Saied Maleki

doi:10.1007/s40097-014-0131-0

Ali Maleki, Rahmatollah Rahimi + Show 1 more

Open Access

https://doi.org/10.1007/s40097-014-0131-0

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Abstract

In this paper, a new magnetic hybrid nanomaterial (Fe3O4@SiO2@PPh3@[CrO3Cl]) was reported for the first time. The magnetic Fe3O4 nanoparticles were prepared by hydrothermal process and coated with a silica shell. Then, the core–shell nanoparticles (Fe3O4@SiO2) were functionalized by 3-chloropropyl trimethoxysilane plus triphenylphosphine for forming the cationic part of support. Finally, anionic part of the Cr(VI) catalyst ([CrO3Cl]−) was immobilized on the magnetic support (Fe3O4@SiO2@PPh3). The structural characteristics of the product were determined using elemental analysis, X-ray fluorescence (XRF), X-ray diffraction (XRD), Fourier transform infrared (FT-IR) and solid state UV–Vis. The particle size and morphology were identified by scanning electron microscope (SEM), transmission electron microscopy (TEM) and XRD. A vibrant sample was employed to determine the magnetic properties of the prepared samples.

Highlights

Chromium(VI) is the most commonly useful compound among oxidizing agents based on higher valent transition metal-oxo derivatives; reagents were derived from ruthenium, osmium, iron, manganese, molybdenum and vanadium
The particle size and morphology were identified by scanning electron microscope (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD)
The electrons can hop between Fe2? and Fe3? ions in the octahedral sites at room temperature causing Fe3O4 to be a main class of half-metallic materials [8]

Summary

Introduction

Chromium(VI) is the most commonly useful compound among oxidizing agents based on higher valent transition metal-oxo derivatives; reagents were derived from ruthenium, osmium, iron, manganese, molybdenum and vanadium. Abstract In this paper, a new magnetic hybrid nanomaterial (Fe3O4@SiO2@PPh3@[CrO3Cl]) was reported for the first time. The magnetic Fe3O4 nanoparticles were prepared by hydrothermal process and coated with a silica shell. The core–shell nanoparticles (Fe3O4@SiO2) were functionalized by 3-chloropropyl trimethoxysilane plus triphenylphosphine for forming the cationic part of support.

Results

Conclusion