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In situ synthesis and properties of reduced graphene oxide/Bi nanocomposites: As an electroactive material for analysis of heavy metals

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Title In situ synthesis and properties of reduced graphene oxide/Bi nanocomposites: As an electroactive material for analysis of heavy metals
 
Creator SAHOO, PK
PANIGRAHY, B
SAHOO, S
SATPATI, AK
LI, D
BAHADUR, D
 
Subject Graphene
RGO/Bi nanocomposite
Heavy metals detection
Stripping voltammetry
BISMUTH-FILM ELECTRODES
ANODIC-STRIPPING VOLTAMMETRY
NANOPARTICLES
CARBON
MERCURY
SUPERLATTICES
SHEETS
GROWTH
 
Description An in situ modified Hummers method (without the use of any surfactants) has been used for the deposition of bismuth (Bi) nanoparticles onto the surface of reduced graphene oxide (RGO) sheets. The as-synthesized nanocomposites were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, transmission electron microscopy (TEM), thermogravimetry (TG) and differential scanning calorimetry (DSC). The morphology of the RGO/Bi nanocomposites provides a better choice as an electrode material for detection of heavy metal ions due to its better functional properties over the Bi film electrode. Trace analysis of heavy metal ions like Cd+2, Pb+2, Cu+2 and Zn+2 in water is carried out by stripping voltammetric analysis using RGO/Bi nanocomposite as an electrode material. The sensitivity and detection limit of the electrode were quantitatively estimated from the analysis. The three sigma detection limits at different deposition potential for Cd2+, Pb2+, Zn2+ and Cu2+ were obtained as 2.8, 0.55, 17 and 26 mu g L-1, respectively. Copper detection using Bi-film electrode was a major challenge, which has been resolved using the RGO/Bi nanocomposite electrode. (c) 2012 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER ADVANCED TECHNOLOGY
 
Date 2014-10-15T10:46:55Z
2014-10-15T10:46:55Z
2013
 
Type Article
 
Identifier BIOSENSORS & BIOELECTRONICS, 43293-296
http://dx.doi.org/10.1016/j.bios.2012.12.031
http://dspace.library.iitb.ac.in/jspui/handle/100/14782
 
Language en