期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 816, 期 -, 页码 14-20出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2018.03.024
关键词
Pt nanoparticles; Poly(3,4-ethylene-dioxythiophene); Graphene; Caffeic acid; Electrochemical sensor
资金
- National Natural Science Foundation of China [51463008, 51502118]
- Innovation Driven 5511 Project of Jiangxi Province [20165BCB18016]
- Natural Science Foundation of Jiangxi Province [20161BAB216131]
- Jiangxi Science and Technology Normal University [3000990315]
In this paper, Pt-PEDOT/reduced grapheme oxide (Pt-PEDOT/rGO) nanocomposites were facilely prepared by a simple and cost-effective one-pot method. The obtained nanocomposites were characterized and confirmed by scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy and Raman spectra. As expected, the Pt-PEDOT/rGO nano composites modified glassy carbon electrode (Pt-PEDOT/rGO/GCE) exhibited higher charge transfer efficiency and electrocatalytic activity to the oxidation of caffeic acid (CA) in comparison with the bare GCE, rGO and Pt-PEDOT modified electrodes (rGO/GCE and Pt-PEDOT/GCE). Furthermore, the Pt-PEDOT/rGO/GCE showed a wide linear range of 5.0 x 10(-9) to 5.0 x 10(-5) M with a low detection limit of 2.0 x 10(-9) M (S/N = 3) for the determination of CA. More experiments indicated that the Pt-PEDOT/rGO/GCE performed superior reproducibility, selectivity and long-term stability. Finally, the modified electrode was also applied to detect CA in green tea and black tea samples with promising recovery and application prospect.
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