Developmental Lab on a 1,2-Dihydroxybenzene Biosensor by the Modification of a Glassy Carbon Electrode with Poly(3-Methylthiophene) (P3MT) Integrated with Silver Nanoparticles (AgNPs)

TCE

The Chemical Educator

ISSN: 1430-4171 (electronic version)

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Abstract Volume 23 (2018) pp 74-77

Developmental Lab on a 1,2-Dihydroxybenzene Biosensor by the Modification of a Glassy Carbon Electrode with Poly(3-Methylthiophene) (P3MT) Integrated with Silver Nanoparticles (AgNPs)

Nooralhuda Arkan^†, Rahmah Alkalaf^†, Matthew Neick^‡, Patrick Cleaver^† and Suzanne Lunsford^†,*

^†Department of Engineering, Wright State University, Dayton, Ohio; ^‡Department of Chemistry, Wright State University, Dayton, Ohio, suzanne.lunsford@wright.edu
Received December 27, 2017. Accepted April 18, 2018.

Published: 27 April 2017

Abstract. This experiment is an extension of a previous lab involving green synthesis of silver nanoparticles using onion extract to modify bare carbon electrodes. In this lab, the incorporation of P3MT was grown electrochemically onto the working carbon electrode followed by the dropping of silver nanoparticles (AgNPs) onto the P3MT carbon electrode surface as a sensor to detect a common 1,2-dihydroxybenzene (catechol). The modified P3MT-AgNPs electrode displayed good electrocatalytic activity with enhanced signal towards catechol in the presence of ascorbic acid without the requirement of prior separation by cyclic voltammetry. Further instrumental techniques utilized were ultraviolet-visible spectroscopy and Scanning Electron Microscopy (SEM) to confirm success of the green synthesis with AgNPs and presence of the polymer P3MT -AgNPs.

Key Words: Laboratories and Demonstrations; instrumental analysis; electrochemical sensors; silver nanoparticles; nanotechnology; neurotransmitters (catechol); interferences (ascorbic acid); UV-Vis; and SEM

(*) Corresponding author. (E-mail: suzanne.lunsford@wright.edu )

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