Sensing of picric acid with a glassy carbon electrode modified with CuS nanoparticles deposited on nitrogen-doped reduced graphene oxide
| Autor: | G. Gnanamoorthy, V. Narayanan, Ranganathan Suresh, Krishnan Giribabu, Sivakumar Praveen Kumar, S. Munusamy, Ramadoss Manigandan, Jun Yeong Kim, Yun Suk Huh, Seo Yeong Oh |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Graphene Scanning electron microscope Inorganic chemistry Oxide Nanochemistry Picric acid 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Analytical Chemistry Nanomaterials Dielectric spectroscopy law.invention chemistry.chemical_compound chemistry law Cyclic voltammetry 0210 nano-technology |
| Zdroj: | Microchimica Acta. 183:2421-2430 |
| ISSN: | 1436-5073 0026-3672 |
| DOI: | 10.1007/s00604-016-1883-7 |
| Popis: | We describe the preparation of a nanohybrid consisting of nitrogen doped reduced graphene oxide and CuS nanoparticles (N-rGO/CuS) by in-situ microwave irradiation at weight ratios of 25/75, 50/50, and 75/25. The resulting nanohybrids were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, FTIR, spectroscopy, scanning electron and transmission electron microscopy, electrochemically by cyclic voltammetry and electrochemical impedance analysis. It is shown that the CuS nanoparticles are evenly decorated onto the N-rGO surface. The nanohybrids was placed on glassy carbon electrode (GCE) where they showed electro-reductive activity towards picric acid, typically at working voltages between −0.2 and −0.8 V (vs. SCE). Effects of pH value and scan rate were evaluated, and it is shown that two electrons are involved in electro-reduction. The detection limits of the GCE modified with various N-rGO/CuS hybrids (with 25/75, 50/50, and 75/25 wt%) are 6.2, 3.2, and 0.069 μM respectively. The method demonstrates its applicability in sensing of picric acid with good reproducibility. |
| Databáze: | OpenAIRE |
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