Graphdiyne and Ionic Liquid Composite Modified Gold Electrode for Sensitive Voltammetric Analysis of Rutin |
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Authors: | Lijun Yan Tingxing Hu Xiaoqing Li Fengze Ding Bei Wang Dr Baoli Wang Bingxue Zhang Fan Shi Prof Wei Sun |
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Institution: | Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province, Key Laboratory of Functional Materials and Photoelectrochemistry of Haikou, College of Chemistry and Chemical Engineering, Hainan Normal University, 571158 Haikou, P.?R. China |
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Abstract: | It is significant to develop a point-of-care testing (POCT) method for rapid detection of medicinal molecules. In this paper, a graphdiyne (GDY)-ionic liquid (IL) composite was prepared via one-step facile ultrasound preparation process and then modified on gold (Au) electrode surface by simple casting method. Scanning electron microscopy and transmission electron microscopy were used to characterize the morphology of GDY-IL composite. Cyclic voltammetric results proved that GDY-IL composite on the electrode surface could effectively improve electron transfer rate, which meant that GDY-IL composite had high conductivity with big surface area. Finally, the modified electrode exhibited excellent performances for rutin detection with wider linear range (8.0×10?9 mol L?1–2.0×10?6 mol L?1 and 2.0×10?6 mol L?1–1.5×10?4 mol L?1) and lower detection limit (2.7 nmol L?1, 3S0/S). The Nafion/GDY-IL/Au electrode showed good sensitivity and high selectivity, which was satisfactory in analytical application to real samples. Therefore, the GDY-IL composite modified electrode has the potential applications in the POCT for electrochemical analysis of various medicinal molecules. |
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Keywords: | Graphdiyne Ionic liquid Rutin Modified electrode Electroanalysis |
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