Selective determination of L-dopa in the presence of ascorbic acid and uric acid using a 3D graphene foam

Two-dimensional (2D) MXenes have shown a great potential for chemical sensing due to their electric properties. In this work, a Ti3C2Tx/polypyrrole (MXene/PPy) nanocomposite has been synthesized and immobilized into a glassy carbon electrode to enable the simultaneous recognition of dopamine (DA) and uric acid (UA) under the interference of ascorbic acid (AA). The multilayer Ti3C2Tx MXene was prepared via the aqueous acid etching method and delaminated to a single layer nanosheet, benefiting the in-situ growth of PPy nanowires. The controllable preparation strategy and the compounding of PPy material remain great challenges for further practical application. A facile chemical oxidation method was proposed to regulate magnitude and density during the forming process of PPy nanowire, which promotes the conductivity and the electrochemical active site of this as-prepared nanomaterial. The MXene/PPy nanocomposite-modified electrode exhibited the selective determination of DA and UA in the presence of a high concentration of AA, as well as a wide linear range (DA: 12.5–125 μM, UA: 50–500 μM) and a low detection limit (DA: 0.37 μM, UA: 0.15 μM). More importantly, the simultaneous sensing for the co-existence of DA and UA was successfully achieved via the as-prepared sensor.

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Simultaneous electrochemical determination of levodopa and uric acid based on ZnS nanoparticles/3D graphene foam electrode

Microchemical Journal ◽

10.1016/j.microc.2019.103977 ◽

2019 ◽

Vol 149 ◽

pp. 103977 ◽

Cited By ~ 6

Author(s):

Hong Yan Yue ◽

Peng Fei Wu ◽

Shuo Huang ◽

Xin Gao ◽

Shan Shan Song ◽

...

Keyword(s):

Uric Acid ◽

Electrochemical Determination ◽

Zns Nanoparticles ◽

Graphene Foam ◽

3D Graphene

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A selective determination of levodopa in the presence of ascorbic acid and uric acid using a glassy carbon electrode modified with reduced graphene oxide

Journal of Applied Electrochemistry ◽

10.1007/s10800-013-0649-8 ◽

2013 ◽

Vol 44 (5) ◽

pp. 589-597 ◽

Cited By ~ 26

Author(s):

Soon-Young Yi ◽

Jong-Hyeok Lee ◽

Hun-Gi Hong

Keyword(s):

Ascorbic Acid ◽

Uric Acid ◽

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Glassy Carbon Electrode ◽

Glassy Carbon ◽

Carbon Electrode ◽

Selective Determination ◽

Reduced Graphene

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Using AuCo alloy nanoparticles/HS-graphene modified electrode for the selective determination of dopamine, ascorbic acid and uric acid

Analytical Methods ◽

10.1039/c4ay02044h ◽

2014 ◽

Vol 6 (22) ◽

pp. 9059-9065 ◽

Cited By ~ 9

Author(s):

Zhe Liu ◽

Xueliang Wang ◽

Li Sun ◽

Zhangyu Yu

Keyword(s):

Ascorbic Acid ◽

Uric Acid ◽

Modified Electrode ◽

Electrochemical Method ◽

Alloy Nanoparticles ◽

Selective Determination ◽

Set Up

An electrochemical method for the selective determination of dopamine (DA), ascorbic acid (AA) and uric acid (UA) was set up using an AuCo alloy nanoparticle/HS-graphene modified electrode.

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