Poly(ionic liquids) functionalized polypyrrole/graphene oxide nanosheets for electrochemical sensor to detect dopamine in the presence of ascorbic acid

2015 ◽  
Vol 70 ◽  
pp. 289-298 ◽  
Author(s):  
Hui Mao ◽  
Jiachen Liang ◽  
Haifeng Zhang ◽  
Qi Pei ◽  
Daliang Liu ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Graphene Oxide ◽  
Ionic Liquids ◽  
Electrochemical Sensor ◽  
Graphene Oxide Nanosheets

Gold nanoparticle decorated polypyrrole/graphene oxide nanosheets as a modified electrode for simultaneous determination of ascorbic acid, dopamine and uric acid

2020 ◽  
Vol 44 (12) ◽  
pp. 4916-4926 ◽  
Author(s):  
Chaoli Tan ◽  
Jie Zhao ◽  
Peng Sun ◽  
Wei Zheng ◽  
Guofeng Cui
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Graphene Oxide ◽  
Electrochemical Performance ◽  
Simultaneous Determination ◽  
Gold Nanoparticle ◽  
Modified Electrode ◽  
Graphene Oxide Nanosheets

AuNPs, GO and PPy are combined effectively to form a novel composite showing a huge enhancement in electrochemical performance compared to the single materials.

scholarly journals Bi2S3/rGO Composite Based Electrochemical Sensor for Ascorbic Acid Detection

Chemosensors ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 190
Author(s):  
Chengling Qu ◽  
He Li ◽  
Shuang Zhou ◽  
Guodong Li ◽  
Cheng Wang ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Graphene Oxide ◽  
Electrochemical Sensor ◽  
Electrochemical Impedance ◽  
Facile Hydrothermal Method ◽  
Reduced Graphene ◽  
Catalytic Sites ◽  
Ascorbic Acid Detection ◽  
Enhanced Electrochemical Performance ◽  
Eis Analysis

The engineering of an efficient electrochemical sensor based on a bismuth sulfide/reduced graphene oxide (Bi2S3/rGO) composite to detect ascorbic acid (AA) is reported. The Bi2S3 nanorods/rGO composite was synthesized using a facile hydrothermal method. By varying the amount of graphene oxide (GO) added to the synthesis, the morphology and size of Bi2S3 nanorods anchored on the surface of rGO can be tuned. Compared to a bare glassy carbon electrode (GCE), the GCE modified with Bi2S3/rGO composite presented enhanced electrochemical performance, which was attributed to the optimal electron transport between the rGO support and the loaded Bi2S3 as well as to an increase in the number of active catalytic sites. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) analysis of Bi2S3/rGO/GCE demonstrate that the active Bi2S3/rGO layer on GCE plays an important role in the electrochemical behavior of the sensor. In particular, the Bi2S3/rGO/GCE sensor shows a wide detecting range (5.0–1200 μM), low detection limit (2.9 µM), good sensitivity (268.8 μA mM−1 cm−2), and sufficient recovery values (97.1–101.6%) for the detection of ascorbic acid.

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