Synthesis and characterization of carbon nanotube-metal nanoparticles (copper and manganese) nanohybrids and their application in construction of electrode modified with ionic liquid towards electrocatalysis of acetaminophen oxidation

Document Type : Research Article

Authors

1 Nanochemistry Research Laboratory, Faculty of Chemistry, University of Mazandaran, 47416-95447, Babolsar, Iran

2 Nanochemistry Research Laboratory, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran

3 Nanochemistry Research Laboratory, Faculty of Chemistry, University of Mazandaran, Postal Code: 47416-95447, Babolsar, Iran

Abstract

In the present research work, multi-walled carbon nanotubes-metal nanoparticles (M-MWCNT; M = Cu, Mn) nanohybrids were prepared by chemical reduction method and the resulting nanohybrids were used for modification of carbon paste electrode (CPE) including 1-butyl 3-methyl-imidazolium hexafluorophosphate as an ionic liquid (IL). For this purpose, functionalized MWCNT and metallic precursors were chemically reduced by hydrazine monohydrate. Morphology and size of the particles were investigated by FE-SEM. FE-SEM studies showed the formation of Cu and Mn nanoparticles with average sizes of approximately 65 and 90 nm onto MWCNT surface, respectively. Elemental mapping of the prepared nanohybrids demonstrated relatively uniform dispersion of Cu and Mn nanoparticles onto the MWCNT surface. By XRD, the crystalline structure of copper and manganase nanoparticles in nanohybrides was identified. The capability of the CPEs including IL and resulting nanohybrides for electrocatalytic oxidation of acetaminophen was studied in 0.1 M phosphate buffer solution (pH=7.0). The obtained results showed the good electrocatalytic activity of modified electrodes towards acetaminophen oxidation. Also, M-MWCNT/IL/CPE nanohybrid in addition of high surface area, due to the synergistic effect, showed higher electrocatalytic activity towards acetaminophen oxidation that those other electrodes used in this research.Detection limits for Cu-MWCNT/IL/CPE were obtained 6.7 and 0.35 μM by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) methods. Also, for Mn-MWCNT/IL/CPE, detection limits were calculated 4.6 and 0.2 μM by CV and DPVmethods, respectively.

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Nashrieh Shimi va Mohandesi Shimi Iran

Articles in Press, Accepted Manuscript
Available Online from 25 January 2022

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