Magister Scientiae - MSc (Chemistry) / In this study, graphene oxide was synthesized by oxidizing graphite using the modified
Hummer's method. The graphene oxide was characterized by Raman Spectroscopy, Fourier
Transform Infrared Spectroscopy, High Resolution Transmission Electron Microscopy,
Scanning Electron Microscopy and X-Ray Diffraction for structural and morphological
properties.
The graphene oxide was electrochemically reduced on a carbon paste electrode followed by
the in situ deposition of mercury thin films to achieve electrochemically reduced graphene
oxide modified carbon paste metal film electrodes (ERGO-CP-MEs).
The experimental parameters (amplitude, deposition time, deposition potential, frequency and
rotation speed) were optimized, and the applicability of the modified electrode was investigated
towards the simultaneous and individual determination of TI1+ and In3+ at the low concentration
levels (?g L-1) in 0.1 M acetate buffer (pH 4.6) using square wave anodic stripping voltammetry
(SWASV). The detection limit values for individual analysis at electrochemically reduced
graphene oxide modified carbon paste mercury film electrode (ERGO-CP-HgE ) was 2.4 and
1.1 ?g L-1 for TI1+ and In3+, respectively. The detection limit values for simultaneous analysis
at ERGO-CPE was 1.32 and 1.33 ?g L-1 and individual analysis was 0.975 and 1.04 ?g L-1 for
TI1+ and In3+, respectively.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:uwc/oai:etd.uwc.ac.za:11394/6433 |
| Date | January 2018 |
| Creators | Martin, Tayla |
| Contributors | Iwuoha, Emmanuel |
| Publisher | University of the Western Cape |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Rights | University of the Western Cape |
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