Improvement of electrochemical performance of screen-printed carbon electrodes by UV/ozone modification

Wang, Jing; Xu, Zheng; Zhang, Mengqi; Liu, Junshan; Zou, Hong-qun; Wang, Liding

doi:10.1016/j.talanta.2018.08.065

Cited by 28 publications

(18 citation statements)

References 33 publications

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“…Furthermore, and more recently, improved electrochemical responses towards K3[Fe(CN)6] and NADH have also been obtained with SPCEs treated with UV/ozone, mainly attributed to the increase of the number of surface oxygen functional groups [48].…”

Section: Characterization Of the Electrode Surface Of Aspcesmentioning

confidence: 97%

Electrochemical performance of activated screen printed carbon electrodes for hydrogen peroxide and phenol derivatives sensing

González-Sánchez

Gómez‐Monedero

Agrisuelas

et al. 2019

Journal of Electroanalytical Chemistry

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Screen-printed carbon electrodes (SPCEs) are widely used for the electroanalysis of a plethora of organic and inorganic compounds. These devices offer unique properties to address electroanalytical chemistry challenges and can successfully compete in numerous aspects with conventional carbon-based electrodes. However, heterogeneous kinetics on SPCEs surfaces is comparatively sluggish, which is why the electrochemical activation of inks is sometimes required to improve electron transfer rates and to enhance sensing performance. In this work, SPCEs were subjected to different electrochemical activation methods and the response to H2O2 electroanalysis was used as a testing probe. Changes in topology, surface chemistry and electrochemical behavior to H2O2 oxidation were performed by SEM, XPS, cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy. The combination of electrochemical activation methods using H2SO4 and H2O2 proved particularly effective. A reduction in charge transfer resistance, together with functionalization with some carbon-oxygen groups on carbon ink surfaces, were likely responsible for such electrochemical improvement. The use of a two-step protocol with 0.5 M H2SO4 and 10 mM H2O2 under potential cycling conditions was the most effective activation procedure investigated herein, and gave rise to 518-fold higher sensitivity than that obtained for the untreated SPCEs upon H2O2 electrooxidation. The electrochemical behavior of acetaminophen, hydroquinone and dopamine is also shown, as a proof of concept upon the optimum activated SPCEs.

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Section: Characterization Of the Electrode Surface Of Aspcesmentioning

confidence: 97%

Electrochemical performance of activated screen printed carbon electrodes for hydrogen peroxide and phenol derivatives sensing

González-Sánchez

Gómez‐Monedero

Agrisuelas

et al. 2019

Journal of Electroanalytical Chemistry

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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]. The augmented electron transfer rate and the decreased peak-to-peak potential separation from 170 mV to 112 mV were mainly attributed to an increase in oxygen functional groups [43].…”

Section: Introductionmentioning

confidence: 99%

“…Improvement of the electrochemical performance of screen-printed carbon electrodes by UV/ozone modification was very recently described [43]. The augmented electron transfer rate and the decreased peak-to-peak potential separation from 170 mV to 112 mV were mainly attributed to an increase in oxygen functional groups [43]. Nonetheless, due to its simplicity, the electrochemical pretreatment is often used for improving carbon electrode responses.…”

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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“…Over the past few decades, screen-printed carbon electrodes (SPCEs) have emerged as important analytical devices, especially for sensing and biosensing, due to their relatively low cost, ease of fabrication, versatility, and wide commercial availability [1,2,3]. However, the use of SPCEs as sensing and biosensing platforms usually requires surface treatment (e.g., mechanical polishing [3], UV–ozone [4], plasma [5], electrochemical activation [6,7], etc.) or modification of the electrode surface with catalysts (e.g., nanomaterials [8,9,10,11,12], enzymes [1,13,14], etc.)…”

Section: Introductionmentioning

confidence: 99%

Screen-Printed Soft-Nitrided Carbon Electrodes for Detection of Hydrogen Peroxide

Ogbu

Feng

Dada

et al. 2019

Sensors

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Nitrogen-doped carbon materials have garnered much interest due to their electrocatalytic activity towards important reactions such as the reduction of hydrogen peroxide. N-doped carbon materials are typically prepared and deposited on solid conductive supports, which can sometimes involve time-consuming, complex, and/or costly procedures. Here, nitrogen-doped screen-printed carbon electrodes (N-SPCEs) were fabricated directly from a lab-formulated ink composed of graphite that was modified with surface nitrogen groups by a simple soft nitriding technique. N-SPCEs prepared from inexpensive starting materials (graphite powder and urea) demonstrated good electrocatalytic activity towards hydrogen peroxide reduction. Amperometric detection of H2O2 using N-SPCEs with an applied potential of −0.4 V (vs. Ag/AgCl) exhibited good reproducibility and stability as well as a reasonable limit of detection (2.5 µM) and wide linear range (0.020 to 5.3 mM).

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Improvement of electrochemical performance of screen-printed carbon electrodes by UV/ozone modification

Cited by 28 publications

References 33 publications

Electrochemical performance of activated screen printed carbon electrodes for hydrogen peroxide and phenol derivatives sensing

Electrochemical performance of activated screen printed carbon electrodes for hydrogen peroxide and phenol derivatives sensing

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

Screen-Printed Soft-Nitrided Carbon Electrodes for Detection of Hydrogen Peroxide

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