Add time:07/29/2019         Source:sciencedirect.com

A new type of terbium diselenide (Tb2Se2) was prepared in the structure of nano octagon and integrated with oxidized carbon nanofiber (f-CNF) by using a simple hydrothermal technique. The oxidation of CNF and the formation of f-CNF/Tb2Se2 nanocomposite were studied by using various analytical techniques such as TEM, FT-IR, Raman, XRD and XPS analysis. In addition, the electrochemical properties of f-CNF/Tb2Se2 nanocomposite modified glassy carbon electrode (GCE) were studied by using the electrochemical techniques such as CV and DPV techniques, which showed low charge transfer resistance (Rct = 7.26 Ω) and high active surface area (A = 0.113 cm2). Meanwhile, the CV of ferricyanide at this electrode showed a low peak potential separation (ΔEp = 0.060 V). Furthermore, the reported f-CNF/Tb2Se2/GCE exhibited an excellent electrochemical activity towards the detection of morin. As expected, f-CNF/Tb2Se2/GCE exhibited high sensitivity (1.07 μA μM−1 cm−2) and acceptable detection limit (0.6 μM) of morin. In addition, f-CNF/Tb2Se2/GCE was found with feasible selectivity, stability, and reproducibility. Finally, the real sample analysis also stated the exclusive performance of f-CNF/Tb2Se2/GCE electrode towards the detection of morin in guava leaves extract.

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