ZIF-8 Coupling with Reduced Graphene Oxide to Enhance the Electrochemical Sensing of Dopamine

Abstract A reduced graphene oxide@zeolitic imidazolate framework-8 (rGO@ZIF-8) based electrochemical sensor was developed and used for dopamine detection. ZIF-8 was rapidly prepared by zinc hydroxide nitrate (Zn-HDS, Zn5(OH)8(NO3)2·2H2O) as precursor. Subsequently, rGO was introduced to enhance the performance of ZIF-8 (e. g., high carrier mobility, favorable stability), and a label-free electrochemical dopamine sensor based on the composite material was obtained with high specific surface area and better conductivity verified by Brunauer-Emmett-Teller surface analysis and electrochemical impedance spectroscopy, respectively. Consequently, rGO@ZIF-8 complex exhibited an admirable electrochemical catalytic performance. For determination of dopamine, the sensor behaves wide linear range from 2.0 x 10-6 to 1.4 x 10-4 mol/L and lower detection limit of 2.0 x 10-8 mol//L (S/N = 3). It also showed sufficient repeatability and durability due to the coordinated amplification effect of rGO and ZIF-8.

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Reduced graphene oxide/nile blue/gold nanoparticles complex-modified glassy carbon electrode used as a sensitive and label-free aptasensor for ratiometric electrochemical sensing of dopamine

Analytica Chimica Acta ◽

10.1016/j.aca.2018.03.036 ◽

2018 ◽

Vol 1025 ◽

pp. 154-162 ◽

Cited By ~ 69

Author(s):

Hui Jin ◽

Chunqin Zhao ◽

Rijun Gui ◽

Xiaohui Gao ◽

Zonghua Wang

Keyword(s):

Gold Nanoparticles ◽

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Glassy Carbon ◽

Nile Blue ◽

Electrochemical Sensing ◽

Carbon Electrode ◽

Label Free ◽

Modified Glassy Carbon Electrode ◽

Reduced Graphene

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Simple and label-free electrochemical impedance Amelogenin gene hybridization biosensing based on reduced graphene oxide

Biosensors and Bioelectronics ◽

10.1016/j.bios.2014.01.053 ◽

2014 ◽

Vol 58 ◽

pp. 145-152 ◽

Cited By ~ 60

Author(s):

Ali Benvidi ◽

Nooshin Rajabzadeh ◽

Mohammad Mazloum-Ardakani ◽

Mohammad Mehdi Heidari ◽

Ashok Mulchandani

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Electrochemical Impedance ◽

Label Free ◽

Amelogenin Gene ◽

Reduced Graphene

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A Facile and Green Synthesis of a MoO2-Reduced Graphene Oxide Aerogel for Energy Storage Devices

Materials ◽

10.3390/ma13030594 ◽

2020 ◽

Vol 13 (3) ◽

pp. 594 ◽

Cited By ~ 3

Author(s):

Mara Serrapede ◽

Marco Fontana ◽

Arnaud Gigot ◽

Marco Armandi ◽

Glenda Biasotto ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Photoelectron Spectroscopy ◽

Electrochemical Impedance ◽

Chemical Reduction ◽

Low Cost ◽

Xps Analysis ◽

3D Scaffold ◽

Energy Storage Devices ◽

Reduced Graphene

A simple, low cost, and “green” method of hydrothermal synthesis, based on the addition of l-ascorbic acid (l-AA) as a reducing agent, is presented in order to obtain reduced graphene oxide (rGO) and hybrid rGO-MoO2 aerogels for the fabrication of supercapacitors. The resulting high degree of chemical reduction of graphene oxide (GO), confirmed by X-Ray Photoelectron Spectroscopy (XPS) analysis, is shown to produce a better electrical double layer (EDL) capacitance, as shown by cyclic voltammetric (CV) measurements. Moreover, a good reduction yield of the carbonaceous 3D-scaffold seems to be achievable even when the precursor of molybdenum oxide is added to the pristine slurry in order to get the hybrid rGO-MoO2 compound. The pseudocapacitance contribution from the resulting embedded MoO2 microstructures, was then studied by means of CV and electrochemical impedance spectroscopy (EIS). The oxidation state of the molybdenum in the MoO2 particles embedded in the rGO aerogel was deeply studied by means of XPS analysis and valuable information on the electrochemical behavior, according to the involved redox reactions, was obtained. Finally, the increased stability of the aerogels prepared with l-AA, after charge-discharge cycling, was demonstrated and confirmed by means of Field Emission Scanning Electron Microscopy (FESEM) characterization.

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Label-free electrochemical immunosensor based on gold nanoparticle/polyethyleneimine/reduced graphene oxide nanocomposite for the ultrasensitive detection of cancer biomarker matrix metalloproteinase-1

The Analyst ◽

10.1039/d1an00537e ◽

2021 ◽

Author(s):

Xinke Liu ◽

Lu-Yin Lin ◽

Fu-Yen Tseng ◽

Yu-Cheng Tan ◽

Jian Li ◽

...

Keyword(s):

Graphene Oxide ◽

Matrix Metalloproteinase ◽

Gold Nanoparticle ◽

Reduced Graphene Oxide ◽

Electrochemical Immunosensor ◽

Ultrasensitive Detection ◽

Label Free ◽

Matrix Metalloproteinase 1 ◽

Reduced Graphene ◽

P Matrix

Matrix metalloproteinase-1 (MMP-1) is associated with many types of cancers, including oral, colorectal, and brain cancers. This paper describes the fabrication of an MMP-1 immunosensor based on a gold nanoparticle/polyethyleneimine/reduced...

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