A Rapid Synthesis of Oriented Palladium Nanoparticles by UV Irradiation

S Navaladian,Tk Varadarajan,B Viswanathan,Rp Viswanath

doi:10.1007/s11671-008-9223-4

S Navaladian, Tk Varadarajan + Show 2 more

Open Access

https://doi.org/10.1007/s11671-008-9223-4

Copy DOI

Abstract

Palladium nanoparticles of average size around 8 nm have been synthesized rapidly by UV irradiation of mixture of palladium chloride and potassium oxalate solutions. A rod-shaped palladium oxalate complex has been observed as an intermediate. In the absence of potassium oxalate, no Pd nanoparticles have been observed. The synthesized Pd nanoparticles have been characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), selective area electron diffraction and energy dispersive analysis by X-rays (EDAX) analyses. XRD analysis indicates the preferential orientation of catalytically active {111} planes in Pd nanoparticles. A plausible mechanism has been proposed for the formation of anisotropic Pd nanoparticles.

Highlights

Nanoparticles of noble metals are gaining importance because of their applications in various fields as well as their considerable stability
Several synthetic methods have been reported regarding the preparation of stable palladium nanoparticles
transmission electron microscopy (TEM) images of black particles are shown in Fig. 1a and b

Summary

Introduction

Nanoparticles of noble metals are gaining importance because of their applications in various fields as well as their considerable stability. Keywords Pd nanoparticles Á UV irradiation Á Potassium oxalate Á Preferential orientation Á Texture coefficient In order to understand the preferential orientation of crystal planes, the average crystallite size of the Pd nanoparticles has been calculated using Scherer equation, and texture coefficient has been calculated [13] by Halls method from the each line in XRD powder pattern of Pd nanoparticles.

Results

Conclusion