Enhanced performances of sensors based on screen printed electrodes modified with nanosized NiO particles

Carbone, Marilena; Nesticò, Alessia; Bellucci, Noemi; Micheli, Laura; Palleschi, Giuseppe

doi:10.1016/j.electacta.2017.06.074

Cited by 41 publications

(22 citation statements)

References 66 publications

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“…The organic functionalization and inorganic nanoparticles attachments on the surface of GR significantly changed the physical and chemical properties of GR and greatly expanded its application field [ 20 , 21 , 22 , 23 , 24 ]. Recently, lots of researches have been carried out to modify the surface of GR with MnO 2 [ 25 , 26 ], SnO 2 [ 27 ], Fe 3 O 4 [ 28 , 29 ], Co 3 O 4 [ 30 ], Cu 2 O [ 31 , 32 , 33 ], NiO [ 34 ], TiO 2 [ 35 ], and other metal oxide nanoparticles, and to find their applications in electrode modification. CeO 2 nanoparticles have the advantages of low cost, excellent electrochemical redox characteristic, and environmental friendliness, and are explored as an excellent electrode modifier material [ 36 ].…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of CeO2/Electrochemically Reduced Graphene Oxide Nanocomposites for Vanillin Detection in Commercial Food Products

et al. 2020

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In this paper, CeO2 nanoparticles were synthesized by the solvothermal method and dispersed uniformly in graphene oxide (GO) aqueous solution by ultrasonication. The homogeneous CeO2-GO dispersion was coated on the surface of a glassy carbon electrode (GCE), and the CeO2/electrochemically reduced graphene oxide modified electrode (CeO2/ERGO/GCE) was obtained by potentiostatic reduction. The results of X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) showed that CeO2 nanocrystals were uniformly coated by gossamer like ERGO nanosheets. The electrochemical behavior of vanillin on the CeO2/ERGO/GCE was studied by cyclic voltammetry (CV). It was found that the CeO2/ERGO/GCE has high electrocatalytic activity and good electrochemical performance for vanillin oxidation. Using the second derivative linear sweep voltammetry (SDLSV), the CeO2/ERGO/GCE provides a wide range of 0.04–20 µM and 20 µM–100 µM for vanillin detection, and the detection limit is estimated to be 0.01 µM after 120 s accumulation. This method has been successfully applied to the vanillin detection in some commercial foods.

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Section: Introductionmentioning

confidence: 99%

Facile Fabrication of CeO2/Electrochemically Reduced Graphene Oxide Nanocomposites for Vanillin Detection in Commercial Food Products

et al. 2020

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“…NiO synthetic pathways include sol-gel, hydrothermal, solvothermal redox [2,3], and microwave-assisted reactions [4], among others. They can be obtained in several shapes, arrangements, and super-structures [5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

NiO Pseudocapacitance and Optical Properties: Does The Shape Win?

et al. 2020

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In the present paper, we investigate the effects of alkali and operational temperature on NiO capacitive and optical properties. The NiO samples were prepared by a straightforward, surfactant-free hydrothermal synthesis, employing Ni(NO3)2 and either urea or moderately sterically hindered triethylamine (TEA). The syntheses were followed by calcinations at either 400 or 600 °C. NiO samples were characterized by XRD, scanning electron microscopy, and nitrogen adsorption isotherms. The optical properties were investigated by reflectance spectroscopy, and the pseudocapacitance was studied by cyclic voltammetry and galvanostatic charge charge-discharge measurements. We found that the synthesis with TEA yielded nanoflowers whereas the morphology of the synthesis with urea varied with the calcination temperature and resulted in nanoparticles or nanoslices at calcination temperatures of 400 and 600 °C, respectively. The NiO samples prepared at a lower temperature displayed a favorable combination of surface area and porosity that allowed for high performance with capacitances of 502 and 520 F g−1 at a current density of 1 A g−1 for nanoflowers and nanoparticles, respectively. The band gaps of all the samples were compatible with the estimated nanoparticle sizes. Finally, we used the synthesized NiO samples for the preparation of screen-printed electrodes (SPEs) modified by drop-casting and probed them against a [Fe(CN)6]3−/4− probe.

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“…The rationale in the approach for defining the sensing material is the best match of substrate and additional modifying material to enhance the sensing properties. We opted for NiO as a substrate, because of its good sensing properties toward CH 4 [17], and because it can be synthesized in different morphologies and various surface areas and porosity [18][19][20], with the aid of several synthetic techniques [21][22][23], whereby the morphological properties reflect the gas-sensing performance [24][25][26][27]. Furthermore, it was shown it can be successfully modified to further improve its sensing capabilities [28].…”

Section: Introductionmentioning

confidence: 99%

CQDs@NiO: An Efficient Tool for CH4 Sensing

Carbone

2020

Applied Sciences

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A composite material based on carbon quantum dots (CQDs) and NiO was prepared and tested for methane sensing. The synthesis procedure is simple and foresees the preparation of the CQDs by citric acid pyrolysis and NiO by hydrothermal synthesis. A phase sonication and stirring procedure yielded the composite CQDs@NiO at different loads. The composites were characterized by X-ray diffraction, ultraviolet–visible light (UV–Vis) spectroscopy, SEM microscopy, energy-dispersive spectroscopy (EDS) mapping, and surface area, porosity, and impedance measurements. A gas sensor was built in-house and used to probe the response of the synthesized samples to CH4 detection, at constant environmental humidity. The CQDs@NiO at 1% weight load displayed excellent performances in terms of gas response both vs. temperature and vs. concentration, whereas higher loads resulted in CQD aggregation and diminished output. Response/recovery times of the 1%CQDs@NiO sample were good, as well as the selectivity and the stability over time and for variable environmental humidity. The estimated limit of detection was 0.1 ppm.

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Enhanced performances of sensors based on screen printed electrodes modified with nanosized NiO particles

Cited by 41 publications

References 66 publications

Facile Fabrication of CeO2/Electrochemically Reduced Graphene Oxide Nanocomposites for Vanillin Detection in Commercial Food Products

Facile Fabrication of CeO2/Electrochemically Reduced Graphene Oxide Nanocomposites for Vanillin Detection in Commercial Food Products

NiO Pseudocapacitance and Optical Properties: Does The Shape Win?

CQDs@NiO: An Efficient Tool for CH4 Sensing

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