Authors

Brandon Tran

Publication Date

Fall 2019

Faculty Advisor

Dr. Paige Hall

College/School

College of Arts & Sciences

Department

Chemistry

Abstract

In this study, we use cyclic voltammetry to measure how nanoparticles would affect the redox potential of various electron transfer mediators (ETMs). The main class of ETMs tested was quinones, and the working electrode was decorated with gold nanoparticles. ETMs are major players in regulating redox processes in aquatic environments, and contamination of these aquatic systems with nanoparticles could drastically change these redox processes. To see if there is a difference in redox potential, we compared redox potentials between bare glassy carbon electrode, indium tin oxide (ITO) electrodes with a polycyclic aromatic hydrocarbon (PAH) layer, which was used to attach nanoparticles, and indium tin oxide electrodes with both PAH and gold nanoparticles. We find that on bare glassy carbon electrode, the redox potential was -0.005 V, ITO electrode with PAH surface had a redox potential of -0.004 V and an ITO electrode with PAH and gold nanoparticles had a redox potential of -0.067 V. As each layer is added, electrocatalysis increases and redox processes become more reversible, showing that gold nanoparticles have an electrocatalytic effect on ETMs.

Subjects

Semiconductor nanoparticles; Nanoparticle dynamics; Voltammetry; Oxidation-reduction reaction; Charge exchange

Publication Information

Copyright for this work retained by the author.

CHM 493: Senior Honor's Project

Document Type

Student Project

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