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  Journal of Nanoscience Letters 2013, 3: 18
  Research Article
Synthesis of chitosan oligomer stabilized silver nanorod and its modified glassy carbon electrode for reduction of chlorophenols
  Prabakaran Eswaran, Parani Sundarrajan, Alexander Marimuthu, Paulraj Pandian, Pandian Kannaiyan  
Department of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai-600 025, India
  We describe a simple way of synthesizing the chitosan oligomer stabilized silver nanorods (AgNR) by polyol method in which polyethylene glycol (PEG 600) serves as both the reducing agent as well as solvent in presence of chitosan oligomer (O-Chit) under reflux condition at 180°C. The resulting AgNR were isolated and then characterized with Fourier Transform Infrared Spectroscopy (FT-IR), UV-visible spectroscopy (UV-Vis), Powder X-ray Diffraction Spectroscopy (PXRD), Field Emission Scanning Electron Microscopy (FE-SEM) and High Resolution Transmission Electron Microscopy (HR-TEM). The electrochemical behavior of the chitosan oligomer stabilized silver nanorods modified glassy carbon electrode (O-Chit/AgNR/GCE) was investigated using a redox probe, K3Fe(CN)6. The electrocatalytic characteristics of (O-Chit/AgNR/GCE) were used for the electrochemical reduction of chlorophenol compounds like 2-chlorophenol (2-CP), 4-chlorophenol (4-CP) and 2, 6-dichlorophenol (2, 6-DCP) in presence of 0.1 M LiClO4 as supporting electrolyte. The influences of scan rate on rate of reduction of chlorophenols were investigated using Linear Sweep Voltammetry (LSV) experiments. From the electrochemical studies the electron transfer rate constant (ks) of reduction reaction was derived. The present system exhibits better electrocatalytic activity performances as compared to other electrodes.
  Chitosan oligomer; Silver Nanorods; Electrocatalytic reduction; Chlorophenols  

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