Nano-silver/multi-walled carbon nanotube composite films for hydrogen peroxide electroanalysis

ArticleinMicrochimica Acta 162(1):51-56 · July 2007with8 Reads
Impact Factor: 3.74 · DOI: 10.1007/s00604-007-0858-0

    Abstract

    A modified electrode has been fabricated with nano-silver/multi-walled carbon nanotube composites and characterized with scanning
    electron microscopy, X-ray powder diffraction and cyclic voltammetry. The electrochemical characteristics of the modified
    electrode have been studied. It has been found that the modified electrode can be used for the direct electroanalysis of hydrogen
    peroxide. A wave appeared at −0.64 V (vs. SCE) on the modified electrode due to the reduction of hydrogen peroxide. There
    was a linear relationship between hydrogen peroxide concentration and the cathodic differential pulse voltammetric current
    in the range 0.35–15 mM with a detection limit of 0.2 mM (S/N = 3). A medical hydrogen peroxide disinfection liquid was analyzed
    and recoveries were obtained between 97.5 and 103.8%.