A novel zeolite-multiwalled carbon nanotube composite for the electroanalysis of copper(II) ion

Abstract

The application of zeolite Y-multiwalled carbon nanotube (MWCNT) nanocomposite modified glassy carbon electrode (zeolite Y-MWCNT/GCE) in the electroanalysis of Cu 2? ion is presented. In order to bring out the unique advantage of the zeolite Y-MWCNT/GCE, experiments were carried out also at graphite/GCE, MWCNT/GCE and zeolite Y-graphite/GCE. For the same surface area, the performance of zeolite Y-MWCNT/GCE was superior to the other modified electrodes in terms of current sensitivity for Cu 2? ion. The combination of zeolite Y and MWCNT as a nanocomposite resulted in a good synergetic effect. The Cu ?2 ion sensor exhibited a linear calibration range between 5 9 10 -8 and 1 9 10 -5 mol L -1 with a detection limit of 1.12 9 10 -8 mol L -1 (0.72 ppb).

Silver-functionalized multi-wall carbon nanotubes composite electrode for non-enzymatic detection of glycerol

“…The effective surface area of the MWCNT-AgZ composite electrode was determined by classical ferri/ferro cyanide system in 1 M KNO 3 , assuming a diffusion coefficient value of 6.3x10 -6 cm 2 /s for K 3 [Fe(CN) 6 ] [8]. The calculated electroactive surface area value was 0.473 cm 2 , which is by 2.4 times higher than the geometric area of the electrode.…”

“…Also, the zeolite-supported electrocatalyst can be exploited to improve the performance of analytical sensing devices [7,8].…”

“…Many studies have been focused on the preparation of composite materials by combination of CNTs with several functional materials, i.e., metal nanoparticles, ceramics and polymers, in order to obtain advanced catalytic and sensory materials [8,10].…”

MWCNT incorporated imine–amine ionophore for electrochemical sensing of copper ions

“…The performance characteristics of the proposed electrode were compared with those of previously reported electrodes for the determination of copper ions [38][39][40][41][42][43][44][45][46][47][48] and are summarized in Table 4. The proposed electrode shows a better selectivity, wide linear range and lower detection limit as compared to the earlier reported electrodes for copper ions.…”