A synergistic combination of reduced graphene oxide and antimony nanoparticles for estriol hormone detection

Cesarino, Ivana; Cincotto, Fernando Henrique; Machado, Sérgio Antônio Spínola

doi:10.1016/j.snb.2015.01.013

Cited by 52 publications

(35 citation statements)

References 22 publications

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“…The rGO-SbNPs composite was previously FEG-SEMmicroscopy and electrochemically characterized, indicating that the GO was reduced and that the rGO was modified with the Sb nanoparticles [10]. The peak oxidation current intensities measured for the three carbon nanostructure (GO, rGO, or GC/rGO-SbNPs) based sensors in the presence of a 50.0 μmol L −1 solution of estriol (Fig.…”

Section: Resultsmentioning

confidence: 95%

“…3b) were taken from Ref. [10] and are given in Table 1. These tables also contain the values of i GO , i rGO , and i GC/rGO-SbNPs calculated using Eq.…”

Section: Resultsmentioning

confidence: 99%

“…Graphene oxide (GO), reduced graphene oxide (rGO), and rGO modified with antimony nanoparticles (rGO-SbNPs) are attractive materials for the detection of estriol and estradiol because they show a pronounced electrochemical oxidation peak, showing high sensitivity and presenting constant sensitivity over a wide range of estriol and estradiol (see Fig. 2) concentration [10]. However, an applicability limitation is imposed by the absence of specificity, since both substances show oxidation peaks centered at only slightly different oxidation potential.…”

Section: Estriol and Estradiolmentioning

confidence: 99%

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An additional tool towards overcoming absence of specificity of carbon nanostructure-based electrochemical sensors—application to estriol and estradiol detection and distinction

Cesarino

Hümmelgen

2015

J Solid State Electrochem

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The tristimulus analysis was applied in differential pulse voltammetry experiments to detect and distinguish two substances using a set of three sensors that respond to both substances, aiming at the development of an additional tool to overcome the absence of specificity of the sensor to a single chemical species. The sensors are based on carbon nanostructures (graphene oxide, reduced graphene oxide, and reduced graphene oxide modified with antimony nanoparticles) and are applied to estriol and estradiol detection in water, which constitutes an environmental problem. We show that apart from substance identification, the method can be used to quantify the relative concentration of the substances in a solution.

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Section: Resultsmentioning

confidence: 95%

“…3b) were taken from Ref. [10] and are given in Table 1. These tables also contain the values of i GO , i rGO , and i GC/rGO-SbNPs calculated using Eq.…”

Section: Resultsmentioning

confidence: 99%

Section: Estriol and Estradiolmentioning

confidence: 99%

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An additional tool towards overcoming absence of specificity of carbon nanostructure-based electrochemical sensors—application to estriol and estradiol detection and distinction

Cesarino

Hümmelgen

2015

J Solid State Electrochem

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“…These results suggest that this novel graphene-based hybrid nanomaterial could be useful for the design of electrochemical biosensor devices for the determination of estriol in clinical and environmental samples. Reference rGO-SbNPs DPV 5.0x10 -10 2.0x10 -7 -1.4x10 -6 [34] MMIPs NPs/CPE CV 1.0 x10 -7 6.0x10 -7 -1.0x10 -4 [35] BDD SWV 1.7x10 -7 2.0x10 -7 -2.0x10 -5 [20] Ni-GCE CV 1.0 x10 -7 5.0x10 -6 -1.0x10 -4 [36] PPOMC SWV 5.0x10 -9 1.0x10 -8 -2.0x10 -6 [37] Pt/MWNTs/GCE SWV 6.2x10 -7 1.0x10 -6 -7.5x10 -5 [38] Lac/rGO/Sb2O5/GCE amperommetry 1.1x10 -8 2.5x10 -8 -1.03x10 -6 this work rGO-SbNPs: reduced graphene oxide-antimony nanoparticles; DPV: differential pulse voltammetry;…”

Section: Resultsmentioning

confidence: 99%

Reduced graphene oxide-Sb2O5 hybrid nanomaterial for the design of a laccase-based amperometric biosensor for estriol

Cincotto

Canevari

Machado

et al. 2015

Electrochimica Acta

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Reduced graphene oxide-Sb2O5 hybrid nanomaterial for the design of a laccase-based amperometric biosensor for estriol, Electrochimica Acta http://dx. AbstractA novel reduced graphene oxide/Sb2O5 hybrid nanomaterial was prepared by a one-pot reaction process. The nanomaterial was characterized by different spectroscopic, microscopic and electrochemical techniques, demonstrating that the graphene sheets were doped with a Sb2O5 thin film. A glassy carbon electrode coated with the hybrid material was further employed as support for the covalent immobilization of laccase to develop an electrochemical biosensor for estriol. The enzyme biosensor showed high sensitivity (275 mA/M) and fast analytical response (4 s) for the hormone, with a limit of detection of 11 nM in the range of 25 nM to 1.03 µM. The biosensor showed high selectivity for the analytical detection of estriol.

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“…Results indicated that the porous hexagonal sheet-like Ni/Co oxide 27 exhibited excellent electrocatalytic activity toward estriol, with a low detection limit 28 of 0.42 nM, and linear range from 1 nM to 14 nM. It is classified as endocrine disrupting compounds 1,2 . Recovery was determined from 92.7% to 30 42 Estriol is one of the estrogens that exhibit a critical effect on reproductive and 43 sexual function.…”

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confidence: 99%

Application of nickel cobalt oxide nanoflakes for electrochemical sensing of estriol in milk

Yu²,

Dong

et al. 2016

RSC Adv.

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In this work, a nickel cobalt oxide (Ni/Co oxide) nanoflake based 21 electrochemical sensor for the fast determination of estriol in milk is presented for the 22 first time. Nanostructured Ni/Co oxide with controlled morphology was synthesized 23 by a facile hydrothermal method. The morphology and the electrochemical 24 performance of the Ni/Co oxide were characterized by scanning electron microscopy 25 transmission electron microscope, and energy dispersive X-ray spectroscopy, 26 respectively. Results indicated that the porous hexagonal sheet-like Ni/Co oxide 27 exhibited excellent electrocatalytic activity toward estriol, with a low detection limit 28 of 0.42 nM, and linear range from 1 nM to 14 nM. Good specificity, stability and 29 reproducibility were also demonstrated. Recovery was determined from 92.7% to 30 103.7% for spiked milk samples, providing a promising platform for fast screening of 31 estriol. 32 33 KEYWORDS： Nickel cobalt oxide; electrochemical sensor; estriol; milk 34 35 36 37 38 39 40 41

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A synergistic combination of reduced graphene oxide and antimony nanoparticles for estriol hormone detection

Cited by 52 publications

References 22 publications

An additional tool towards overcoming absence of specificity of carbon nanostructure-based electrochemical sensors—application to estriol and estradiol detection and distinction

An additional tool towards overcoming absence of specificity of carbon nanostructure-based electrochemical sensors—application to estriol and estradiol detection and distinction

Reduced graphene oxide-Sb2O5 hybrid nanomaterial for the design of a laccase-based amperometric biosensor for estriol

Application of nickel cobalt oxide nanoflakes for electrochemical sensing of estriol in milk

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