Synthesis and Characterization of Carbon Nanodots for Detection and Quantification of Ferric (III) Ions

Tan, Shao Chien (2017) Synthesis and Characterization of Carbon Nanodots for Detection and Quantification of Ferric (III) Ions. Masters thesis, UNIMAS.

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Abstract

In this research, green electrochemically synthesized Carbon Nanodots (C-Dots) and one-pot microwave synthesized Nitrogen-doped Carbon Nanodots (N-CDs) were studied as chemical sensor for detection of Ferric (Fe3+) ions. C-Dots were synthesized electrochemically through a green chemistry approach using spent battery carbon rods and ultrapure water. The C-Dots were used to modify Screen Printed Carbon Electrode (SPCE) through drop-coating method and the electrochemical properties were characterized using Cyclic Voltammetry (CV). The current intensity of the C-Dots modified SPCE was shown to improve significantly by 259% when compared to the unmodified SPCE. Various concentration of Fe3+ ions ranging from 0.5 to 25.0 ppm further enhanced the current intensity up to 734% when compared with unmodified SPCE, showing a trend of linear relationship. The SPCE electrochemical sensor strip exhibited a linear detection range of 0.5 to 25.0 ppm Fe3+ ions and the limit of detection (LOD) calculated was 0.44 ± 0.04 ppm (S/N ratio of 3).

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