A robust nitrobenzene electrochemical sensor based on chitin hydrogel entrapped graphite composite
| Autor: | Sukanya Ramaraj, Selvakumar Palanisamy, Vijayalakshmi Velusamy, James M. Hall, Shen-Ming Chen, Pan Yi-Fan, Rajalakshmi Sakthivel, Sayee Kannan Ramaraj |
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| Rok vydání: | 2017 |
| Předmět: |
Detection limit
Materials science General Chemical Engineering Composite number Analytical chemistry 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Amperometry 0104 chemical sciences Electrochemical gas sensor Nitrobenzene chemistry.chemical_compound Chemical engineering chemistry Electrode Graphite Cyclic voltammetry 0210 nano-technology |
| Zdroj: | Journal of the Taiwan Institute of Chemical Engineers. 80:663-668 |
| ISSN: | 1876-1070 |
| DOI: | 10.1016/j.jtice.2017.08.047 |
| Popis: | An amperometric nitrobenzene (NB) sensor has been developed based on a glassy carbon electrode (GCE) modified with the composite of chitin hydrogel stabilized graphite (GR-CHI) composite. The physicochemical characterization confirmed the formation of GR-CHI composite and was formed by the strong interaction between GR and CHI. Furthermore, GR-CHI composite modified GCE was used to study the electrochemical reduction behavior of NB by cyclic voltammetry (CV) and compared with GR and CHI modified GCEs. The CV results confirmed that GR-CHI composite modified electrode has high catalytic ability and lower reduction potential toward NB than other modified electrodes due to the combined unique properties of exfoliated GR and CHI. The GR-CHI composite modified electrode can be able to detect the NB in the linear response range from 0.1 to 594.6 µM with the lower detection limit of 37 nM by amperometric i–t method. The selectivity of the sensor is evaluated in the presence of nitroaromatic, biologically active and dihydroxybenzene compounds. The sensor shows appropriate practicality and good repeatability toward detection of NB in lab water samples. |
| Databáze: | OpenAIRE |
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