Synthesis of Chromium(III) Oxide Nanoparticles by Electrochemical Method and Mukia Maderaspatana Plant Extract, Characterization, KMnO&amp;lt;sub&amp;gt;4 &amp;lt;/sub&amp;gt;Decomposition and Antibacterial Study

Rakesh ,S Ananda,Netkal M Made Gowda

doi:10.4236/mrc.2013.24018

Abstract

Chromium oxide nanoparticles were synthesized by the reduction of potassium dichromate solution with Mukia Maderaspatana plant extract. In electrochemical methods, Cr2O3 nanoparticles were synthesized by two ways, using platinum (Pt) electrodes and K2Cr2O7 solution with H2SO4 as medium in the first case. And chromium doped platinum electrode (Pt/Cr) in presence of NaHCO3 solution in second case. The resulting Cr2O3 nanoparticles were characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), UV-VIS absorption and Fourier-transform infrared (FTIR) spectroscopy. The enhancing influence of Cr2O3 nanoparticles as a catalyst for the decomposition of KMnO4 has been studied. The antibacterial effect of Cr2O3 nanoparticles against E. coli was investigated. These particles were shown to have an effective bactericide.

Highlights

The study of fine and ultrafine particles has received increasing interest due to new properties that material may show when the grain size is reduced [1]
Chromium oxide nanoparticles were synthesized by the reduction of potassium dichromate solution with Mukia Maderaspatana plant extract
The resulting Cr2O3 nanoparticles were characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), UV-VIS absorption and Fourier-transform infrared (FTIR) spectroscopy

Summary

Introduction

The study of fine and ultrafine particles has received increasing interest due to new properties that material may show when the grain size is reduced [1]. Various techniques for the synthesis of Cr2O3 nanoparticles such as hydrothermal [10], sol gel [11], combustion [12], precipitation-gelation [7], gel citrate [13], mechanochemical process [14], urea-assisted homogeneous precipitation [15], gas condensation [16], and microwave plasma have been developed [17] Both chromium oxide and supported chromium have been used as catalyst in many reactions such as oxidation of toluene [18], ethane dehydrogenation [12], and methanol decomposition [3]. We have synthesized chromium(III) oxide nanoparticles by different methods and their catalytic effects on the KMnO4 decomposition and antibacterial activity have been reported here

Experimental

Results and Discussion

Chromium Oxide as a Catalyst in the Course of KMnO4 Decomposition

Antibacterial Assay

Conclusion