Renewable Surface Carbon-composite Electrode Bulk Modified with GQD-RuCl3Nano-composite for High Sensitive Detection ofl -tyrosine
| Autor: | Esmaeil Habibi, Hassan Heidari |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Detection limit
Materials science Carbonization Analytical chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Graphene quantum dot 0104 chemical sciences Analytical Chemistry Electrochemical gas sensor Chemical engineering Electrode Cyclic voltammetry Fourier transform infrared spectroscopy 0210 nano-technology |
| Zdroj: | Electroanalysis. 28:2559-2564 |
| ISSN: | 1040-0397 |
| DOI: | 10.1002/elan.201600010 |
| Popis: | The ability to analytically detect L-tyrosine is a clinical necessity not only for the diagnosis of some diseases such as tyrosinemia, but also for the study on various tyrosine-associated disorders. In here, graphene quantum dot (GQD) was synthesized by carbonization of citric acid and used to prepare GQD-RuCl3 nano-composite. GQD and GQD-RuCl3 were characterized by Fourier transform infrared (FTIR) and Transmission electron microscopy (TEM). Next the nano-composite was modified with carbon-composite electrode (CCE) and the electrochemical properties of GQD-RuCl3|CCE were studied by cyclic voltammetry (CV). This bulk modified electrode showed good electrocatalytic activity for L-tyrosine oxidation. The values of the detection limit and sensitivity were obtained as 0.23 µM and 90 nA/µM. The results indicated that the synergistic incorporation of RuCl3 with GQD conspicuously promotes the sensitivity of the sensor. Moreover, the sensor showed long-term stability and good selectivity towards the detection of L-tyrosine. |
| Databáze: | OpenAIRE |
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