Three-dimensional porous graphene-based composite materials: electrochemical synthesis and application

Chen, Kaiwu; Chen, Libin; Chen, Yunqiang; Bai, Hua; Li, Lei

doi:10.1039/c2jm34816k

Cited by 227 publications

(155 citation statements)

References 63 publications

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Section: Morphological and Structural Characterizationmentioning

confidence: 99%

“…[29][30][31] This process can be regarded as a directed growth mechanism, in which the GO nanosheets in the dispersion are enriched on the electrode. 29 Consequently, we investigated the influence of the GO concentration in the IL solution on the microstructure of the assembled 3D porous graphene layer on the ACF electrode. When the GO concentration in the IL solution is as low as 0.5 mg ml − 1 , the electrodeposited ERGO layer on the ACF electrode is a loose and disordered film rather than a well-ordered 3D porous structure due to the inefficient crosslinking of the graphene nanosheets (Supplementary Figure S2a).…”

Section: Morphological and Structural Characterizationmentioning

confidence: 99%

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PtAu alloy nanoflowers on 3D porous ionic liquid functionalized graphene-wrapped activated carbon fiber as a flexible microelectrode for near-cell detection of cancer

et al. 2016

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Recent advances in flexible fiber-based microelectrodes have opened a new horizon for sensitive real-time near-cell and even intracellular measurements. In this work, we develop a new type of hierarchical nanohybrid microelectrode based on three-dimensional (3D) porous graphene-wrapped activated carbon fiber (ACF) via a facile and effective electrodeposition of graphene oxide (GO) nanosheets on ACF using a green ionic liquid (IL) as the electrolyte. This technique enables the simultaneous electrodeposition and electrochemical reduction of GO nanosheets on ACF to form 3D porous IL functionalized electrochemically reduced GO (ERGO)-wrapped ACF (IL-ERGO/ACF). The adsorbed IL molecules on the ERGO surface provide sufficient active sites and act as the template for the in situ electrodeposition of highly dense and well-dispersed bimetal PtAu nanoflowers on the 3D IL-ERGO scaffold. By virtue of the unique array of structural and chemical properties of bimetal PtAu nanocatalysts and 3D porous IL-ERGO on ACF, the resultant PtAu nanoflowers-decorated IL-ERGO/ACF (PtAu/IL-ERGO/ACF) microelectrode demonstrates a variety of excellent sensing performances, including high sensitivity, a wide linear range and good selectivity in the electrochemical detection of a newly emerged cancer biomarker, hydrogen peroxide (H 2 O 2 ). When used for the real-time tracking of H 2 O 2 secreted from female cancer cells, such as breast cancer cells and gynecological cancer cells, the electrochemical sensor based on the PtAu/IL-ERGO/ACF microelectrode provides important information for distinguishing between different cancer cells and normal cells and for evaluating the therapeutic activity of antitumor drugs towards live cancer cells, which are of great clinical significance for cancer diagnosis and management.

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Section: Morphological and Structural Characterizationmentioning

confidence: 99%

Section: Morphological and Structural Characterizationmentioning

confidence: 99%

PtAu alloy nanoflowers on 3D porous ionic liquid functionalized graphene-wrapped activated carbon fiber as a flexible microelectrode for near-cell detection of cancer

et al. 2016

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“…3D porous graphene-based composite materials were prepared by electrochemical deposition [10]. 3D graphene porous material is prepared electrochemically by reducing a concentrated graphene oxide dispersion.…”

Section: Out-of-plane Generation Of 3d Graphene-based Porous Superstrmentioning

confidence: 99%

Preparation of Porous Graphene-Based Nanomaterials for Electrochemical Energy Storage Devices

Piao

2015

Nano Devices and Circuit Techniques for Low-Energy Applications and Energy Harvesting

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Graphene-based nanostructures exhibit good mechanical strength, high porosity, outstanding electrical conductivity, and excellent thermal and chemical stability, which in addition to its low cost, versatile functionalization chemistry, and relative ease of large-scale preparation make it ideally suited to serve as a key component for the development of new electrode materials. Recently, a wide variety of methods have been developed for the formation of porous graphene architectures to further improve the performances. Porous graphene provides abundant pathways for rapid ion diffusion and high accessible surface area. In this chapter, the recent continued breakthroughs in the preparation of porous graphene-based nanoarchitectures as well as their applications as electrode materials for electrochemical energy storage devices are introduced.

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“…Wang et al [11] prepared solid-state ECL sensors of TPA on the screen printed electrodes with the composite film of poly(sodium 4-styrenesulfonate) functionalized GR and Nafion. However, GR on the electrode surfaces usually forms agglomerates and exhibits planar stacking structures due to the strong π-interaction between GR sheets, which results in the decrement of the specific surface area and hinders the mass transfer [12,13]. Three-dimensional porous graphene (3D-pGR) remains inherent properties of GR and also exhibits some unique properties including large specific surface area, interconnected porous structure, and high mass transfer rate [13,14].…”

Section: Introductionmentioning

confidence: 99%

Porous graphene containing immobilized Ru(II) tris-bipyridyl for use in electrochemiluminescence sensing of tripropylamine

Lin

et al. 2016

Microchim Acta

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Three-dimensional porous graphene (3D-pGR) was used to immobilize Ru(II) tris-bipyridyl [Ru(bpy) 3 2+ ] for electrochemiluminescence (ECL) based sensing of tripropylamine (TPA). The 3D-pGR with interpenetrating porous structures was produced from freeze-drying dispersions containing graphene oxide followed by calcination. Field emission scanning electron microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy were used to characterize morphologies and the composition of the 3D-pGR. After immobilization of Ru(bpy) 3 2+ onto the electrodes, the results indicated that the ECL intensity from the 3D-pGR modified electrode was higher by a factor of 2.5 than that from the graphene film, which was attributed to a larger active surface area and faster electron transfer. The modified electrode was further used to determine TPA in water, and a good linear range from 0.5 to 100 μM with the detection limit as low as 0.4 nM was obtained. The ECL assay presented here also exhibits potential applications in detection of biomolecules such as DNA, glucose, thrombin, lysozyme, etc.

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Three-dimensional porous graphene-based composite materials: electrochemical synthesis and application

Cited by 227 publications

References 63 publications

PtAu alloy nanoflowers on 3D porous ionic liquid functionalized graphene-wrapped activated carbon fiber as a flexible microelectrode for near-cell detection of cancer

PtAu alloy nanoflowers on 3D porous ionic liquid functionalized graphene-wrapped activated carbon fiber as a flexible microelectrode for near-cell detection of cancer

Preparation of Porous Graphene-Based Nanomaterials for Electrochemical Energy Storage Devices

Porous graphene containing immobilized Ru(II) tris-bipyridyl for use in electrochemiluminescence sensing of tripropylamine

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