scholarly journals Ultrasensitive Detection of Nitrite Based on gold-nanoparticles/ Polyrhodamine B/Carbon Nanotubes Modified Glassy Carbon Electrode with Enhanced Electrochemical Performance

2017 ◽  
pp. 10642-10659 ◽  
Author(s):  
He Xu ◽  
Keyword(s):  
Carbon Nanotubes ◽  
Gold Nanoparticles ◽  
Electrochemical Performance ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Ultrasensitive Detection ◽  
Carbon Electrode ◽  
Modified Glassy Carbon Electrode ◽  
Enhanced Electrochemical Performance

PAn/Cu Bismuthate Nanoflake Composites with Enhanced Electrochemical Performance for TA

2020 ◽  
Vol 12 (1) ◽  
pp. 48-57 ◽  
Author(s):  
Z. Wang ◽  
H.J. Chen ◽  
F.F. Lin ◽  
L. Yan ◽  
Y. Zhang ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Performance ◽  
Tartaric Acid ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Limit Of Detection ◽  
Carbon Electrode ◽  
Modified Glassy Carbon Electrode ◽  
Enhanced Electrochemical Performance

Background: Measuring tartaric acid in liquid food, such as fruits or fruit products is of great importance for assessing the quality of the food. Objective: The aim of the research is to obtain polyaniline/Cu bismuthate nanoflake composites by an in-situ polymerization route for the electrochemical detection of tartaric acid. Methods: Polyaniline/Cu bismuthate nanoflake composites were prepared by in-situ aniline polymerizing route in aqueous solution. The obtained products were characterized by X-Ray diffraction (XRD), Transmission Electron Microscopy (TEM) and high-resolution TEM (HRTEM), respectively. The electrochemical performance for tartaric acid detection has been investigated by cyclic voltammetry method using polyaniline/Cu bismuthate nanoflake composites modified glassy carbon electrode. Results: The nanocomposites comprise of tetragonal CuBi2O4 phase. Polyaniline particles with the size of less than 100 nm attach to the surface of the nanoflakes. A pair of quasi-reversible cyclic voltammetry peaks are located at -0.01 V and +0.04 V, respectively at the 20wt.% polyaniline/Cu bismuthate nanoflake composites modified glassy carbon electrode. The limit of detection is 0.58 µM with the linear range of 0.001-2 mM. The linear range increases from 0.005-2 mM to 0.001-2 mM and limit of detection decreases from 2.3 µM to 0.43 µM with increasing the polyaniline content from 10wt.% to 40wt.%. Conclusion: Comparing with the Cu bismuthate nanoflakes modified glassy carbon electrode, polyaniline/ Cu bismuthate nanoflake composites modified glassy carbon electrode shows enhanced electrochemical performance for tartaric acid detection.

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