화학공학소재연구정보센터
Journal of Electroanalytical Chemistry, Vol.769, 118-123, 2016
Electrochemical sensor for sensitive determination of nitrite based on the CuS-MWCNT nanocomposites
A functional nanocomposite of copper sulfide nanoparticles (CuS) supported on multiwall carbon nanotubes (MWCNTs) was synthesized and used for fabricating a nitrite sensor. X-ray diffraction analysis indicated that the product was CuS-MWCNTs. The morphology of the nanocomposite was studied by transmission electron microscopy. The glass carbon electrode modified with CuS-MWCNTs showed excellent electrocatalytic activities to the oxidation of nitrite in pH 7.0 phosphate buffer. The sensor could detect nitrite in a linear range of 1.0 M to 8.1 mM with a correlation coefficient of 0.9989 and sensitivity of 131.2 mu mM(-1) cm(-2), a detection limit of 0.33 M at a signal-to-noise ratio of 3. Additionally, the sensor exhibited good reproducibility, long-term stability, and anti-interference. (C) 2016 Elsevier B.V. All rights reserved.