Electrocatalytic Performance of Chemically Synthesized PIn-Au-SGO Composite toward Mediated Biofuel Cell Anode

Ruma Perveen,Sufia Ul Haque,Inamuddin Inamuddin,Abu Nasar,Abdullah M Asiri,Ghulam Md Ashraf

doi:10.1038/s41598-017-13539-1

Ruma Perveen, Sufia Ul Haque + Show 4 more

Open Access

https://doi.org/10.1038/s41598-017-13539-1

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Abstract

The proposed work intended to make an intellectual contribution to the domain of green nanotechnology which emphasizes the chemical synthesis of a conducting nanocomposite based on the incorporation of gold nanoparticles (Au) into the redox matrix of polyindole (PIn) along with the subsequent improvement in the overall properties of the composite by the addition of sulfonated graphene oxide (SGO). The bioanode was developed by the deposition of the PIn-Au-SGO nanocomposite with subsequent immobilization of ferritin (Frt) and glucose oxidase (GOx) on the glassy carbon electrode (GC). The successful application of the PIn-Au-SGO nanocomposite toward the development of a ferritin-mediated glucose biofuel cell anode was studied by the electrochemical characterization of the constructed bioanode (GC-PIn-Au-SGO/Frt/GOx) for the bioelectrocatalytic oxidation of glucose. The maximum current density obtained by the modified bioanode was found to be 17.8 mA cm−2 at the limiting glucose concentration of 50 mM in 0.1 M K4Fe(CN)6 at a scan rate of 100 mVs−1. The lifetime of the concerned bioelectrode when stored at 4 °C was estimated to be 53 days approximately. The appreciable results of the structural and electrochemical characterization of the PIn-Au-SGO based bioelectrode reveal its potential applications exclusively in implantable medical devices.

Highlights

Outcome of the combinational property of both poly(p-phenylene) and polypyrrole in concert[18] in areas including electronic hardware, electrocatalysis, energy, and pharmacology
This study collectively reports a fast, simple, proficient and cost effective preparation of PIn-Au-sulfonated graphene oxide (SGO) nanocomposite for its electrocatalytic execution as a bioanode for enzymatic glucose biofuel cells
The presence of all the peaks of PIn and SGO in the PIn-Au-SGO nanocomposite epitomizes the fruitful association of polyindole with sulfonated graphene oxide[60]

Summary

Introduction

Outcome of the combinational property of both poly(p-phenylene) and polypyrrole in concert[18] in areas including electronic hardware, electrocatalysis, energy, and pharmacology. The working principle of EBFCs is the same as in conventional fuel cells, wherein the electrons are generated during redox processes and the transfer of these electrons from the anode to cathode is driven through an external electrical circuit, causing power generation. These biofuel cells are a means of biomass conversion and fill the need of an alternative source of energy for implantable biomedical gadgets, for example, transmitters, scaled down sensors, pacemaker and manufactured organs[52,53,54].

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