Friday, 13 November 2020 13:11

Determination of Pollutants in Water based on Graphenated Polypyrrole-nanoalloys Nanocomposite

Written by Dr. Stephen N. Mailu
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Dr. Stephen N. Mailu

Machakos University, P.O Box 136-90100, Machakos, Kenya.

Corresponding Author: smailu@mksu.ac.ke : +254 719765804

In Kenya, Cancer is estimated to be the second leading cause of non-communicable diseases related deaths after cardiovascular diseases and accounting for 7% of overall national mortality. Hydrazine has been classified as human carcinogen by the Environmental Protection Agency (EPA). It has been reported that its exposure to humans causes damage to liver, kidney, lungs and respiratory tract system and has long-term effects on the central nervous system. Due to these side-effects, it is highly desirable to fabricate portable, economical, sensitive and rapid methodologies for the determination of hydrazine. This work focuses on the methodologies of harnessing the unique properties of electro-conductive polymers and nanomaterials and their application in sensor technology. A highly sensitive, rapid and simple electrochemical sensor for the detection of hydrazine has been developed using graphenated polypyrrole-Ag-Au nano alloys nano composite. The electrocatalysis of hydrazine on the synthesized nano composite was investigated in aqueous medium using cyclic voltammetry (CV) and square wave voltammetry (SWV). An increased current density, decreased oxidation ove rpotential and low detection limits were observed. The results showed that the synthesized nanocomposite exhibited excellent characteristics for their application in the development of highly sensitive, cheap and easy to use electrochemical sensors for hydrazine detection.

Keywords: Carcinogen, Cyclic voltammetry, Hydrazine, Nanoalloys, Over potential.

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