Abstract
A novel and convenient electrochemical sensor, based on multi-walled carbon nanotube (MWCNT)–poly-melamine(PMel)–silver nanoparticle (AgNP) composite-modified glassy carbon electrode (GCE), was fabricated for the determination of nitrobenzene (NB). The modified electrode not only played an efficient electrocatalytic role for the reduction of NB but also significantly reduced the overpotential of NB, and the peak current increased greatly compared with bare GCE or other modified electrodes. The excellent performance of NB sensor can be ascribed to the synergistic effect between MWCNT and AgNP. The synergistic effect promoted the electron transfer between MWCNT and AgNP significantly and enhanced the electrochemical reduction ability of NB remarkably. Besides, PMel has huge nitrogen and amine groups, which contributes to the dispersion of silver nanoparticles and also improves the electrocatalytic activity and sensitivity of the sensor. The integration of PMel/MWCNT with AgNP provided a high-performance platform for the NB determination. Under the optimized experimental conditions, the developed sensor showed a wide linear calibration ranges from 20 to 1000 μM and from 1000 to 6000 μM, with a low detection limit (0.55 μM) for the detection of NB. At the same time, the modified electrode exhibited good stability and reproducibility and acceptable selectivity. Moreover, the proposed sensors were successfully employed to determine NB in real samples, and the recoveries were between 97.2 and 104.6 %.
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This work was financially supported by the Natural Science Foundation of Hebei Province of China (No. B2016206150).
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Ren, J., Li, L., Cui, M. et al. Nitrobenzene electrochemical sensor based on silver nanoparticle supported on poly-melamine functional multi-walled carbon nanotube. Ionics 22, 1937–1945 (2016). https://doi.org/10.1007/s11581-016-1713-2
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DOI: https://doi.org/10.1007/s11581-016-1713-2