Fabrication of an electrochemical sensor based on functionalized multi-walled carbon nanotube layer-by-layer framework on modified screen printed carbon electrode for the detection of secondary metabolite in Ganoderma boninense infected oil palm

Authors

  • Fowotade Sulayman Akanbi
  • Nor Azah Yusof
  • Jaafar Abdullah
  • Yusran Sulaiman

DOI:

https://doi.org/10.11113/mjcat.v3n1.82

Keywords:

Secondary metabolite, Ganoderma, Multi-walled carbon nanotube, Electrochemical sensor, Oil palm

Abstract

The fabrication of this novel electrode is based on layer-by-layer self-assembly approach using functionalized multi-walled carbon nanotubes as precursor. The composites namely gold nano particle functionalized MWCNT (AuNPs-aCNT) and chitosan - functionalized MWCNT (CTS-aCNT) were alternatively deposited on a screen printed carbon electrode (SPCE) by dipping in respective solutions followed by oven drying. The modified electrode is then applied for the electrochemical detection of secondary metabolite, using quinoline as an analyte. The thickness of the surface coatings was monitored via electrochemical approach. Composites formation was verified through field emission scanning microscope. The electrocatalytic activity of modified electrode towards oxidation of quinoline was evaluated using cyclic voltammetry(CV) and linear sweep voltammetry(LSV). Under the optimal conditions, the oxidation peak current is proportional to quinoline concentration in the linear range 0.0004 and 1.0μM, and the limit of detection (LOD) is 3.75nM. The modified electrode also exhibited good accuracy, stability and reproducibility, which might be due to contributive unique characteristics of gold nano particles, chitosan, multi-walled carbon nanotubes and synergistic interaction between them.

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Published

2017-08-18

How to Cite

Akanbi, F. S., Yusof, N. A., Abdullah, J., & Sulaiman, Y. (2017). Fabrication of an electrochemical sensor based on functionalized multi-walled carbon nanotube layer-by-layer framework on modified screen printed carbon electrode for the detection of secondary metabolite in Ganoderma boninense infected oil palm. Malaysian Journal of Catalysis, 3(1). https://doi.org/10.11113/mjcat.v3n1.82

Issue

Vol. 3 No. 1 (2018): Special Issue for NanoMITe Annual Symposium 2016

Section

Research Article

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