Abstract
The paper describes the synthesis of a reduced graphene oxide (rGO)/lanthanum oxide (La2O3) nanocomposite utilizing a simple reflux method. The presence of lanthanum oxide nanoparticles was confirmed by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-Ray analysis (EDAX), and Fourier-transform infrared spectroscopy (FTIR) analysis. rGO and La2O3/rGO had average crystallite sizes (D) of 14.96nm and 22.83 nm, respectively. Using cyclic voltammetry (CV) and Differential pulse voltammetry (DPV), electrochemical detection of tartaric acid (TA) and grape juice was done on synthesized material. The La2O3/rGO electrode was used to measure tartaric acid and grape juice concentrations, and the detection limits of both sensors were determined to be 151 μM and 127 μM respectively. The La2O3/rGO electrode also has a larger surface area.
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