scholarly journals Application of Ionic Liquid-Graphene-NiO Hollowsphere Composite Modified Electrode for Electrochemical Investigation on Hemoglobin and Electrocatalysis to Trichloroacetic Acid

2017 ◽  
pp. 4025-4034 ◽  
Author(s):  
Wenshu Zhao ◽  
Keyword(s):  
Ionic Liquid ◽  
Modified Electrode ◽  
Trichloroacetic Acid ◽  
Electrochemical Investigation

scholarly journals Highly Sensitive Detection of Dopamine at Ionic Liquid Functionalized RGO/ZIF-8 Nanocomposite-Modified Electrode

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Lei Cheng ◽  
Youjun Fan ◽  
Xingcan Shen ◽  
Hong Liang
Keyword(s):  
Ionic Liquid ◽  
Modified Electrode ◽  
Electrocatalytic Activity ◽  
Electrochemical Impedance ◽  
Modified Electrodes ◽  
Differential Pulse ◽  
Zeolitic Imidazolate Framework ◽  
Response Range ◽  
Highly Sensitive ◽  
Highly Sensitive Detection

A hybrid and hierarchical nanocomposite was successfully prepared by the growth of zeolitic imidazolate framework-8 (ZIF-8) on the template of ionic liquid (IL, [Bmim][BF4]) functionalized reduced graphene oxide (IL-RGO). The structure and morphology of the IL-RGO/ZIF-8 nanocomposite were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectrometer (FTIR), and Raman spectroscopy. The results showed that RGO sheets were refrained from restacking by IL, and ZIF-8 nanoparticles grew well on the surface of IL-RGO. Owing to the synergistic effect from large surface area and excellent electrocatalytic activity of ZIF-8 and great electrical conductivity of IL-RGO, a highly sensitive sensor for dopamine (DA) can be obtained. IL-RGO/ZIF-8-modified electrode exhibits good electrocatalytic activity and electroconductive properties towards DA which were investigated by cyclic voltammetry (CV), differential pulse voltammetry (DPV), and electrochemical impedance spectroscopy (EIS). Compared with bare or IL-RGO-modified electrodes, the IL-RGO/ZIF-8-modified electrode effectively depressed the oxidation overpotential of DA. The linear response range of DA was from 1.0×10−7 to 1.0×10−4 mol/L with a low detection of limit 3.5×10−8 mol/L. In addition, the sensor was shown to provide satisfactory stability for the determination of DA.

A direct electron transfer biosensor based on a horseradish peroxidase and gold nanotriangle modified electrode and electrocatalysis

2018 ◽  
Vol 10 (44) ◽  
pp. 5297-5304 ◽  
Author(s):  
Yanyan Niu ◽  
Juan Liu ◽  
Wei Chen ◽  
Chunxiao Yin ◽  
Wenju Weng ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Ionic Liquid ◽  
Horseradish Peroxidase ◽  
Modified Electrode ◽  
Direct Electron Transfer ◽  
Direct Electrochemistry ◽  
Carbon Ionic Liquid Electrode ◽  
Liquid Electrode ◽  
Gold Nanotriangles

Gold nanotriangles (AuNTs) were used as a modifier on the surface of a carbon ionic liquid electrode (CILE), which was applied to realize direct electrochemistry and electrocatalysis of horseradish peroxidase (HRP).

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