Low-cost screen-printed electrodes based on electrochemically reduced graphene oxide-carbon black nanocomposites for dopamine, epinephrine and paracetamol detection

Ibáñez-Redín, Gisela; Wilson, Deivy; Gonçalves, Débora; Oliveira, Osvaldo N.

doi:10.1016/j.jcis.2017.12.085

Cited by 132 publications

(50 citation statements)

References 49 publications

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“…The LOD values at 1 a-GCE and 1 b-GCE for PA found to be 4.33 μM and 1.73 μM, while the LOQ value were 5.77 μM and 1.41 μM. The LOD values at 1 a-GCE and 1 b-GCE are better comparable with those reported elsewhere for PA, [13,14,48,[51][52][53][54][55] as shown in Table 3.…”

Section: Chronoamperometric Kinetics Of Pa and Analytical Performancesupporting

confidence: 85%

Analytical Detection and Electrocatalysis of Paracetamol in Aqueous Media Using Rare‐Earth Double‐Decker Phthalocyaninato Chelates as Electrochemically Active Materials

2020

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Paracetamol (PA), being an analgesic and antipyretic medicine, can cause fatal hepatotoxicity and nephrotoxicity when overdosed. It is therefore important to develop electrochemical sensors that can monitor and quantify it in aquatic environments. In this study, rare‐earth sandwich‐type phthalocyaninato chelates based on neodymium (1 a) and samarium (1 b) were employed as electrocatalysts to modify glassy carbon electrodes (GCE) for the first time. It was found that 1 a‐modified GCE (herein referred to as 1 a‐GCE) is less conductive than 1 b‐modified counterpart (1 b‐GCE). A larger rate constant was also obtained for 1 b‐GCE. It was established that a faster oxidation rate efficiency was responsible for lower limit of detection value obtained for 1 b‐GCE as compared to 1 a‐GCE.

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Section: Chronoamperometric Kinetics Of Pa and Analytical Performancesupporting

confidence: 85%

Analytical Detection and Electrocatalysis of Paracetamol in Aqueous Media Using Rare‐Earth Double‐Decker Phthalocyaninato Chelates as Electrochemically Active Materials

2020

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“…One of the main advantageous key feature of CB is the facile preparation of a stable dispersion assisted by just one-step of sonication (60 min at 59 kHz) without any further chemical and CAT [43], NADH [9,10,13,42], BQ [10], EP [10], H 2 O 2 [10,44,49], Heme protein [40], Hg [50], BPA [51,52], As [53], AA [44], Cys [13], Phosphate [54], Glucose [44],HQ [44] DA [16,17,58,59], APAP [16,17,47,59,60], AA [17], UA [17], LEV [47], Mesotrione [48], Estriol [56], AM [57], NI [57], EP [58], IP [60], PP [60], CAF [60] physical treatment. The easy way to prepare a stable dispersion allows for a reproducible dispersion as well as reproducible CBmodified electrodes.…”

Section: Reproducibility and Storage Stability Of Cb Dispersionmentioning

confidence: 99%

Inside the different types of carbon black as nanomodifiers for screen-printed electrodes

Mazzaracchio

Tomei

Cacciotti

et al. 2019

Electrochimica Acta

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The need to deliver high performant and miniaturised electrochemical sensors has boosted the use of carbon nanomaterials as smart modifiers of working electrode surface. Among the carbon nanomaterials, the common and cost-effective carbon black has recently attracted the attention from the scientific community for its outstanding features as electrode nanomodifier for analyte detection. Herein, we report the structural and morphological characterisation of several types of carbon blacks, namely HP 160, HS20, MTN 990, N115, N220, N375, N660, PL6, Super P, and XE2B, by means of Raman spectroscopy, transmission electron microscopy (TEM) and scanning electron microscopy (SEM) analyses. Furthermore, the electrochemical characterisation of screen-printed electrodes modified with these carbon blacks was carried out by cyclic voltammetry and electrochemical impedance spectroscopy with ferro/ferricyanide as redox probe, highlighting the advantage to use carbon black as nanomodifier in respect to the bare electrode. Among several tested carbon black types, the lowest peak-to-peak separation and resistance to electron transfer values were achieved using screen-printed electrodes modified with CB N115, N375, HP 160 and PL6. The electrodes modified with these types of CB were successively tested in cyclic voltammetry towards epinephrine, benzoquinone, ascorbic acid, cysteine, catechol, and caffeic acid, observing a remarkable improvement of electrochemical performances in respect to the bare electrode, even when the amperometric mode was used. The results obtained demonstrated that several types of CB can remarkably improve the electrochemical performances of the sensors in terms of the decrease of applied potential or peak-to-peak separation, the improvement of the peak intensity, and the decrease of the resistance of the electron transfer due to several key features, including nanodimensions, the onionlike carbon structure, and the high number of defect sites.

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“…In the latest years, several pretreatment procedures for the SPCE surface aiming to improve the sensitivity and reproducibility of the results have been reported [43][44][45][46][47][48][49][50]. Improvement of the electrochemical performance of screen-printed carbon electrodes by UV/ozone modification was very recently described [43].…”

Section: Introductionmentioning

confidence: 99%

Influence of Graphene Oxide Concentration when Fabricating an Electrochemical Biosensor for DNA Detection

et al. 2019

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We have investigated the influence exerted by the concentration of graphene oxide (GO) dispersion as a modifier for screen printed carbon electrodes (SPCEs) on the fabrication of an electrochemical biosensor to detect DNA hybridization. A new pretreatment protocol for SPCEs, involving two successive steps in order to achieve a reproducible deposition of GO, is also proposed. Aqueous GO dispersions of different concentrations (0.05, 0.1, 0.15, and 0.2 mg/mL) were first drop-cast on the SPCE substrates and then electrochemically reduced. The electrochemical properties of the modified electrodes were investigated after each modification step by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), while physicochemical characterization was performed by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. Finally, the sensing platform was obtained by the simple adsorption of the single-stranded DNA probe onto the electrochemically reduced GO (RGO)-modified SPCEs under optimized conditions. The hybridization was achieved by incubating the functionalized SPCEs with complementary DNA target and detected by measuring the change in the electrochemical response of [Fe(CN)6]3–/4– redox reporter in CV and EIS measurements induced by the release of the newly formed double-stranded DNA from the electrode surface. Our results showed that a higher GO concentration generated a more sensitive response towards DNA detection.

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Low-cost screen-printed electrodes based on electrochemically reduced graphene oxide-carbon black nanocomposites for dopamine, epinephrine and paracetamol detection

Cited by 132 publications

References 49 publications

Analytical Detection and Electrocatalysis of Paracetamol in Aqueous Media Using Rare‐Earth Double‐Decker Phthalocyaninato Chelates as Electrochemically Active Materials

Analytical Detection and Electrocatalysis of Paracetamol in Aqueous Media Using Rare‐Earth Double‐Decker Phthalocyaninato Chelates as Electrochemically Active Materials

Inside the different types of carbon black as nanomodifiers for screen-printed electrodes

Influence of Graphene Oxide Concentration when Fabricating an Electrochemical Biosensor for DNA Detection

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