Mg/Al layered double hydroxide-Pt nanoparticle composite by delamination-restacking route

Nityashree N Nityashree N,Premitha Menezes

doi:10.1007/s13204-012-0137-1

Abstract

Platinum nanoparticle intercalated magnesium–aluminum layered double hydroxide (LDH) composite was prepared by restacking the colloidal dispersion of organically modified LDH in the presence of preformed oleylamine capped platinum nanoparticles in n-butanol. The resultant nanocomposite was characterized using powder X-ray diffraction (PXRD), infrared (IR) spectroscopy, transmission electron microscopy (TEM), selected area electron diffraction and energy dispersive X-ray spectroscopy (EDX). The PXRD pattern of the composite indicates an expanded interlayer due to the intercalation of the Pt-nanoparticles into the LDH interlayer region. PXRD patterns along with the IR spectra confirm the formation of the precursors and the composite. TEM image of Pt-nanoparticles shows spherical particles with an average particle size of ~3 nm and that of the composite shows dispersed Pt-nanoparticles on the LDH matrix. The presence of Pt, Mg and Al in the composite is indicated in the EDX data.

Highlights

Metal nanoparticle supported layered solid composites are gaining immense attention for their application as catalysts (Choudary et al 2000; Huu et al 2000, Gerardin et al.2005), optically tunable materials (Smith et al 2001), energy conversion devices (Granqvist 2007), sensors (Trudeau 2007; Liu et al 2012), photocatalysts (Nosaka 2011), etc
An alternate and more effective way of synthesizing layered solid-nanoparticle composites is by delamination of layered solid to obtain a colloidal suspension of monolayers followed by restacking the layers in the presence of preformed nanoparticles
We report the synthesis of metal nanoparticle dispersed layered solid composite making use of preformed oleylamine (OA) capped Pt nanoparticles and dodecyl sulfate (DS) modified Mg/Al layered double hydroxide (LDH) by delamination–restacking method in n-butanol

Summary

Introduction

Metal nanoparticle supported layered solid composites are gaining immense attention for their application as catalysts (Choudary et al 2000; Huu et al 2000, Gerardin et al.2005), optically tunable materials (Smith et al 2001), energy conversion devices (Granqvist 2007), sensors (Trudeau 2007; Liu et al 2012), photocatalysts (Nosaka 2011), etc. Abstract Platinum nanoparticle intercalated magnesium– aluminum layered double hydroxide (LDH) composite was prepared by restacking the colloidal dispersion of organically modified LDH in the presence of preformed oleylamine capped platinum nanoparticles in n-butanol.

Results

Conclusion