Ultrasensitive and simultaneous detection of heavy metal ions based on three-dimensional graphene-carbon nanotubes hybrid electrode materials

Huang, Hui; Chen, Ting; Liu, Xiuyu; Ma, Houyi

doi:10.1016/j.aca.2014.09.010

Cited by 249 publications

(101 citation statements)

References 42 publications

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“…The G band of CNTs-COOH was much lower in intensity than G band of GO. The results were in basic agreement with the previous report [4,8]. After hybridizing with GO, the spectrum of GO/CNTs-COOH showed the strong D and G bands and their bands shifted to the lower frequency as compared to those of GO.…”

Section: Characterizationsupporting

confidence: 94%

See 1 more Smart Citation

Synthesis of Cobalt hexacyanoferrate decorated graphene oxide/carbon nanotubes-COOH hybrid and their application for sensitive detection ofhydrazine

Deng

Qiu

et al. 2015

Electrochimica Acta

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Section: Characterizationsupporting

confidence: 94%

“…Carbon nanotubes (CNTs), as a one-dimensional carbonmaterial, are recommendable to hybridize with GO. The hybridization of CNTs not only enhances the conductivity of GO, but there exists a great synergy between CNTs and GO, which helps the nanocomposites to obtain the excellent electrocatalysis properties over CNTs or GO alone [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Cobalt hexacyanoferrate decorated graphene oxide/carbon nanotubes-COOH hybrid and their application for sensitive detection ofhydrazine

Deng

Qiu

et al. 2015

Electrochimica Acta

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“…Similar phenomena have also been observed in carbon nanotube-Nafion, 26 ordered mesoporous carbon/Nafion (OMC/Nafion), 32 Nafion-graphene, 28,42 and carbon nanotube-graphene hybrid/Nafion. 30 This enhancement may originate from two contributions of MHCS. On the one hand, MHCS particles immobilized on the electrode surface by Nafion provide abundant effective nucleation sites for metal ion reduction, as illustrated in Fig.…”

Section: +mentioning

confidence: 99%

“…With these properties, nanoscale carbon-based materials are also adopted as an active component for heavy metal sensing. 24 Up to date, multi-wall carbon nanotubes, [25][26][27] graphene, 28,29 carbon nanotube-graphene hybrids, 30 AlOOH-reduced graphene oxide, 31 mesoporous carbon, 32 SiC, 33 and nitrogen-doped porous carbon 34 have been reported for the stripping detection of heavy metal ions. In the present work, we introduced a new carbon-based material, microporous hollow carbon spheres (MHCS), to the stripping analysis application.…”

Section: Introductionmentioning

confidence: 99%

Combination of Microporous Hollow Carbon Spheres and Nafion for the Individual Metal-free Stripping Detection of Pb2+ and Cd2+

Niu

Zhang

et al. 2016

ANAL. SCI.

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IntroductionWith the increasingly severe water, soil, agriculture, and food pollutions resulting from heavy metals and their harmfulness to living organisms, the sensing of these heavy metals with reliable results and convenient operations turns out to be of great significance.1-4 Among all well-established methods for trace metal determination, including inductively coupled plasmaatomic emission spectrometry (ICP-AES), atomic absorption spectroscopy (AAS), and inductively coupled plasma-mass spectrometry (ICP-MS), electrochemical stripping analysis is always recognized as an efficient detection tool. 5 Especially, the superiorities of miniaturized equipment, low cost, and test rapidity endow this approach with wide applications in in-field/ on-site monitoring. Early stripping measurements of heavy metals are performed with mercury-based electrodes. [6][7][8] Considering its hypertoxicity, replacing mercury with other "green" metals, such as gold, 9,10 bismuth, [11][12][13][14][15] antimony, [16][17][18] tin, 19 and copper, 20 has been recommended for heavy metal sensing. In stripping analysis with metal electrodes as the sensing platform, high-concentration metal precursors (up to mg/L) are usually utilized for the in-situ preconcentration, and a posttreatment is also required to clear off the metal residues. During these processes, secondary pollution from these metals possibly occurs. In this context, developing metal-free electrodes, instead of metal-based electrodes, seems to be more attractive, from the perspective of "green analysis", for the anodic stripping determination of trace heavy metal ions.Carbon-based materials, especially porous carbon, are extensively used in the adsorption, separation and purification, catalysis, and energy-storage fields. [21][22][23] They can provide large specific surface area, excellent chemical and mechanical stabilities, and versatile structures with low production cost. With these properties, nanoscale carbon-based materials are also adopted as an active component for heavy metal sensing. 24 Up to date, multi-wall carbon nanotubes, [25][26][27] have been reported for the stripping detection of heavy metal ions. In the present work, we introduced a new carbon-based material, microporous hollow carbon spheres (MHCS), to the stripping analysis application. Nafion, a perfluorinated ion exchange polymer or ionomer, is commonly used as a binder to immobilize active materials onto electrode substrates. With the easy film-formation and its hydrophobic fluorocarbon network, the Nafion film is highly stable in aqueous solution both thermodynamically and chemically. In addition to the inert binder role, Nafion can act as an active material as well. Here, the combination of Nafion with microporous hollow carbon spheres (MHCS) is first proposed to fabricate a disposable metal-free electrode for heavy metal stripping sensing. The MHCS-Nafion composite film electrode is prepared by drop-casting a mixture of MHCS and Nafion onto the lab-made screen-printed carbon electrode (SPCE*).Re...

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“…Interestingly, except the two characteristic absorption peaks of GO, a sharp absorption peak could be observed at 200 nm in the spectrum of GO-CMWCNTs, which was ascribed to thestacking interaction between the basal plane of GO and the sidewalls of CMWCNTs. 31,32 The morphology and microstructure of the GO-CMWCNTs nanocomposites were characterized by SEM as shown in Fig. 1(b).…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

Nonenzymatic Electrochemical Immunosensor Using Ferroferric Oxide–Manganese Dioxide–Reduced Graphene Oxide Nanocomposite as Label for α-Fetoprotein Detection

Jian

Wang

Chen

et al. 2016

NANO

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A novel nonenzymatic electrochemical immunosensor was fabricated for quantitative detection of -fetoprotein (AFP). The immunosensor was constructed by modifying gold electrode with electrochemical reduction of graphene oxide-carboxyl multi-walled carbon nanotube composites (ERGO-CMWCNTs) and electrodeposition of gold nanoparticles (AuNPs) for e®ective immobilization of primary antibody (Ab 1 Þ. Ferroferric oxide-manganese dioxide-reduced graphene oxide nanocomposites (Fe 3 O 4 @MnO 2 -rGO) were designed as labels for signal ampli¯cation. On one hand, the excellent electroconductivity and outstanding electron transfer capability of ERGO-CMWCNTs/AuNPs improved the sensitivity of the immunosensor. On the other hand, introduction of rGO could not only increase the speci¯c surface area for immobilization of secondary antibody (Ab 2 Þ but also build a synergetic e®ect to reinforce the electrocatalytic properties of catalysts. Fe 3 O 4 @MnO 2 -rGO nanocomposites were characterized by scanning electron microscope, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Using AFP as a model analyte, the proposed sandwich-type electrochemical immunosensor exhibited a wide linear range of 0.01-50 ng Á mL À1 with a low detection limit of 5.8 pg Á mL À1 . Moreover, the Fe 3 O 4 @MnO 2 -rGO-based peroxidase mimetic system displayed an excellent analytical performance with low cost, satisfactory reproducibility and high selectivity, which could be further extended for detecting other disease-related biomarkers.

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Ultrasensitive and simultaneous detection of heavy metal ions based on three-dimensional graphene-carbon nanotubes hybrid electrode materials

Cited by 249 publications

References 42 publications

Synthesis of Cobalt hexacyanoferrate decorated graphene oxide/carbon nanotubes-COOH hybrid and their application for sensitive detection ofhydrazine

Synthesis of Cobalt hexacyanoferrate decorated graphene oxide/carbon nanotubes-COOH hybrid and their application for sensitive detection ofhydrazine

Combination of Microporous Hollow Carbon Spheres and Nafion for the Individual Metal-free Stripping Detection of Pb2+ and Cd2+

Nonenzymatic Electrochemical Immunosensor Using Ferroferric Oxide–Manganese Dioxide–Reduced Graphene Oxide Nanocomposite as Label for α-Fetoprotein Detection

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