SnO2 nanoparticles/reduced graphene oxide nanocomposite for fast ethanol vapor sensing at a low operating temperature with an excellent long-term stability

In this study, we report a universal approach allowing the non-covalent deposition of gold nanoparticles on reduced graphene oxide surface in a controlled fashion. We used a modified Hummers method to obtain graphene oxide, which then underwent surficial functionalization with carboxyl moieties coupled with simultaneous reduction. Nanoparticles were synthesized ex-situ and capped with a thiolated poly-ethylene glycol (PEG) ligand. The interactions between the surface of modified graphene oxide and nanoparticle ligands enabled the formation of stable hybrid graphene-nanoparticles materials in the aqueous phase. Using this technique, we were able to cover the surface of graphene with gold nanoparticles of different shapes (spheres, rods, triangles, stars, and bipyramids), broad range of sizes (from 5 nm to 100 nm) and controlled grafting densities. Moreover, materials obtained with this strategy exhibited long-term stability, which coupled with the versatility and facility of preparation, makes our technique appealing in the light of increasing demand for new graphene-based hybrid nanostructures.

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Electrochemical oxidation of glucose on gold nanoparticle-modified reduced graphene oxide electrodes in alkaline solutions

Functional Materials Letters ◽

10.1142/s1793604715400044 ◽

2015 ◽

Vol 08 (03) ◽

pp. 1540004 ◽

Cited By ~ 6

Author(s):

Qiaofang Shi ◽

Guowang Diao ◽

Shaolin Mu

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Glucose Oxidation ◽

Alkaline Solutions ◽

Long Term Stability ◽

Oxide Electrodes ◽

Reduced Graphene ◽

Constant Potential ◽

Oxidation Of Glucose

A given amount of gold is electrodeposited on the reduced graphene oxide (RGO)/glassy carbon (GC) electrodes to form Au /RGO/GC electrodes, which are carried out at different potentials. The Au /RGO/GC electrode with Au loading of 250 μg cm-2 prepared at a constant potential of -0.30 V exhibits the best electrocatalytic activity to glucose oxidation in alkaline solutions because of homogeneous dispersion of gold nanoparticles with smaller sizes. This electrode shows long-term stability, rapid charge transfer ability, and higher current density compared to other gold electrodes reported previously.

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Ultrahigh water permeance of a reduced graphene oxide nanofiltration membrane for multivalent metal ion rejection

Chemical Communications ◽

10.1039/d0cc06302a ◽

2020 ◽

Vol 56 (95) ◽

pp. 15068-15071

Author(s):

Fangfang Dai ◽

Risheng Yu ◽

Ruobing Yi ◽

Jian Lan ◽

Rujie Yang ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Metal Ion ◽

Nanofiltration Membrane ◽

Long Term Stability ◽

Ion Rejection ◽

Reduced Graphene ◽

Multivalent Metal ◽

Water Permeance

A simple way to fabricate pure rGO membranes shows ultrahigh water permeance and excellent multivalent metal ion rejection, as well as long-term stability.

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SnO2 nanoparticles-reduced graphene oxide nanocomposites for NO2 sensing at low operating temperature

Sensors and Actuators B Chemical ◽

10.1016/j.snb.2013.08.067 ◽

2014 ◽

Vol 190 ◽

pp. 472-478 ◽

Cited By ~ 302

Author(s):

Hao Zhang ◽

Jianchao Feng ◽

Teng Fei ◽

Sen Liu ◽

Tong Zhang

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Operating Temperature ◽

Sno2 Nanoparticles ◽

Reduced Graphene

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Dynamic shear rheology behavior and long term stability kinetics of reduced graphene oxide filled poly (vinyl alcohol) biofilm

Polymer Testing ◽

10.1016/j.polymertesting.2018.06.019 ◽

2018 ◽

Vol 69 ◽

pp. 583-592 ◽

Cited By ~ 10

Author(s):

Bhasha Sharma ◽

Shashank Shekhar ◽

Sanjeev Gautam ◽

Purnima Jain

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Vinyl Alcohol ◽

Poly Vinyl Alcohol ◽

Dynamic Shear ◽

Long Term Stability ◽

Reduced Graphene ◽

Stability Kinetics ◽

Kinetics Of

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A Promising Electrochemical Platform for Dopamine and Uric Acid Detection Based on a Polyaniline/Iron Oxide-Tin Oxide/Reduced Graphene Oxide Ternary Composite

Molecules ◽

10.3390/molecules25245869 ◽

2020 ◽

Vol 25 (24) ◽

pp. 5869

Author(s):

Daria Minta ◽

Adam Moyseowicz ◽

Stanisław Gryglewicz ◽

Grażyna Gryglewicz

Keyword(s):

Uric Acid ◽

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Simultaneous Detection ◽

Ternary Composite ◽

Long Term Stability ◽

Sensing Platform ◽

Low Concentrations ◽

Reduced Graphene

A ternary polyaniline/Fe2O3-SnO2/reduced graphene oxide (PFSG) nanocomposite was prepared using a simple two-step hydrothermal treatment. The composite was applied as a glassy carbon electrode modifier (GCE) to enhance dopamine (DA) and uric acid (UA) detection. The ternary PFSG composite was compared with its binary precursor Fe2O3-SnO2/reduced graphene oxide (FSG). The influence of the modified GCE electrodes on their performance as a sensing platform was determined. GCE/PFSG showed better sensing parameters than GCE/FSG due to the introduction of polyaniline (PANI), increasing the electrocatalytic properties of the electrode towards the detected analytes. GCE/PFSG enabled the detection of low concentrations of DA (0.076 µM) and UA (1.6 µM). The peak potential separation between DA and UA was very good (180 mV). Moreover, the DA oxidation peak was unaffected even if the concentration of UA was ten times higher. The fabricated sensor showed excellent performance in the simultaneous detection with DA and UA limits of detection: LODDA = 0.15 µM and LODUA = 6.4 µM, and outstanding long-term stability towards DA and UA, holding 100% and 90% of their initial signals respectively, after one month of use.

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