Electrochemical degradation of benzene in natural water using silver nanoparticle-decorated carbon nanotubes

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2013-08-15
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Cesarino, Ivana
Cesarino, Vivian
Moraes, Fernando C.
Ferreira, Tanare C. R.
Lanza, Marcos R. V.
Mascaro, Lucia H. [UNIFESP]
Machado, Sergio A. S.
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In this study, a novel methodology for the electrochemical degradation of benzene in natural water using silver nanoparticle-decorated carbon nanotubes has been investigated. the morphology, the structure, and the electrochemical performance of the multi-walled carbon nanotubes-silver (MWCNT-Ag) nano-composite film were characterised by transmission electron microscopy (TEM), X-ray diffraction (XRD), and cyclic voltammetry (CV), respectively. Electrocatalytic oxidation of benzene in an aqueous solution was studied to evaluate potential applications of the MWCNT-Ag modified glassy carbon (GC) electrode in environmental science. the benzene removal efficiency in natural water containing 10 mg L-1 benzene yielded 77.9% at an applied potential of +2.0 V for 2 h using the MWCNT-Ag-GC electrode. in comparison, the removal efficiency reached only 8.0% with the bare GC electrode, showing the suitability of the MWCNT-Ag nanocomposite modified GC electrode for electro-oxidation of benzene in natural water. (c) 2013 Elsevier B.V. All rights reserved.
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Materials Chemistry and Physics. Lausanne: Elsevier Science Sa, v. 141, n. 1, p. 304-309, 2013.