In situ formation of nitrogen doped mesoporous carbon via directly carbonizing polyaniline as an efficient electrocatalyst for determination of capsaicin
| Autor: | Wilai Siriwatcharapiboon, Pathaporn Temcheon, Panitat Hasin, Orapin Chienthavorn |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrocatalyst 01 natural sciences 0104 chemical sciences Electrochemical gas sensor chemistry.chemical_compound chemistry Linear range Mechanics of Materials Capsaicin Specific surface area Polyaniline Electrode Linear sweep voltammetry General Materials Science 0210 nano-technology Nuclear chemistry |
| Zdroj: | Microporous and Mesoporous Materials. 278:327-339 |
| ISSN: | 1387-1811 |
| Popis: | Nitrogen-doped mesoporous carbon (N-MC) modified glassy carbon electrode (GCE) with high electrocatalytic activity is presented for highly sensitive determination of capsaicin. Due to its moderate specific surface area (151 m2 g−1) and uniform mesostructure (3.9 nm), the N-MC/GCE enhances the adsorption kinetics of capsaicin on the electrode surface via π-π interaction between capsaicin and N-MC. Linear Sweep Voltammetry (LSV) shows significant enhancement of the oxidation peak current due to its good conductivity and excellent electrocatalytic activity. Under optimal conditions, the electrochemical sensor shows a remarkably low detection limit of 0.46 μM (S/N = 3) with a wide linear range of capsaicin from 1-10 μM and 10–40 μM. Finally, the modified electrode was successfully applied to determination of capsaicin in chili peppers with an acceptable recovery range of 82–120%. |
| Databáze: | OpenAIRE |
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