| Title | Industrial waste reuse: An alternative source to reduced graphene oxide for preparing electrochemical sensors |
|---|---|
| ID_Doc | 10527 |
| Authors | Melo, JF; Junior, JHS; Freire, TBD; Rigoti, E; Pergher, SBC; Martínez-Huitle, CA; Castro, PS |
| Title | Industrial waste reuse: An alternative source to reduced graphene oxide for preparing electrochemical sensors |
| Year | 2023 |
| Published | |
| Abstract | Development of sustainable electroanalytical platforms based on recovering approaches has great importance, once that they aim to minimize waste and increase reusing/recycling efforts, as well as engage the circular economy. This work converted an industrial waste carbon source to a recycled reduced graphene oxide (r-rGO) using a cost effective wide scale synthesis. The r-rGO was characterized by SEM, XRD, FTIR, and Raman spec-troscopy techniques and as a proof-of-concept the new material was applied as electrode modifier for paracet-amol (PAR) electroanalytical determination in tablets. The simple, easy and rapid technique of drop casting a suspension solution of r-rGO, was used to prepare the surface of a chemically modified glassy carbon electrode (GCE) forming a r-rGO/GCE sensor. Differential pulse voltammetry (DPV) was optimized and applied success-fully in the paracetamol determination with a linear range of 60-500 mu mol L-1 and detection limit of 0.28 mu mol L-1. Then, two commercialy avaliable paracetamol tablets were used, with a minimum sample preparation, achieving recoveries of 99.43% and 100.47%. A HPLC (high performance liquid chromatography) comparative method was performed obtaining recoveries of 100.92% and 101.00%. Finally, the obtained results demonstrate that the r-rGO/GCE sensor can be a promising alternative for the quantitative determination of PAR in phar-maceutical formulations. |
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