Graphene paper with electrodeposited NiCo2S4 nanoparticles as a novel flexible sensor for simultaneous detection of folic acid and ascorbic acid

Erçarıkcı, Elif; Aksu, Zeriş; Kıranşan, Kader Dağcı; Topç̧u, Ezgi

doi:10.1016/j.diamond.2021.108713

Cited by 17 publications

(8 citation statements)

References 58 publications

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“…The EIS was studied at the open circuit potential at an AC voltage of 5 mV over the frequency range 0.1–1 × 10 5 Hz. The electroactive surface area of the ZnCo-MOF/GS electrode was determined by using the Randles–Sevcik equation as described in our previous studies. , …”

Section: Methodsmentioning

confidence: 99%

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Three-Dimensional ZnCo-MOF Modified Graphene Sponge: Flexible Electrode Material for Symmetric Supercapacitor

2022

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Developing flexible, lightweight, and portable energy storage systems have become a necessity with the advent of wearable electronic devices in modern society. We report a novel, easy, and low-cost way to fabricate flexible bimetallic metal–organic framework (MOF) doped graphene sponge (GS) free-standing materials (ZnCo-MOF/GS). The electrochemical behavior of the flexible ZnCo-MOF/GS was probed via galvanostatic charge–discharge, electrochemical impedance spectroscopy, and cyclic voltammetry. The morphological and structural studies of this material were performed by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and Raman spectrometry. ZnCo-MOF/GS exhibited a high specific capacitance of 695 F/g at 1.0 A/g and excellent cyclic stability with 78% retention after a 7500 cycle test in 3.0 M KOH. Furthermore, a ZnCo-MOF/GS based symmetric supercapacitor (SC) was fabricated, and this flexible device displayed a specific capacitance of 302 F/g at 1.0 A/g, an energy density of 108 W h/kg, and a power density of 5037 W/kg. Moreover, this flexible SC kept its excellent performance at severe bending conditions. We believe that our electrode with its outstanding electrochemical performance has a great potential in energy storage applications, especially for lightweight and flexible electronics.

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Section: Methodsmentioning

confidence: 99%

“…The electroactive surface area of the ZnCo-MOF/ GS electrode was determined by using the Randles−Sevcik equation as described in our previous studies. 59,60 The capacitance performance of the prepared ZnCo-MOF/GS material was carried out in 3.0 M KOH aqueous solution and calculated by…”

Section: Methodsmentioning

confidence: 99%

Three-Dimensional ZnCo-MOF Modified Graphene Sponge: Flexible Electrode Material for Symmetric Supercapacitor

2022

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“…In Figure 2D, GSM shows approximately 1.5 times the resistance of the GP prepared in our previous studies. 46,47 Although the electrical conductivity of GSM is lower than GP, it exhibits a higher electroactive surface area due to possessing a porous structure.…”

Section: Mechanical Strength and Flexibility Of Gsmmentioning

confidence: 99%

Design of metal phosphite decorated sponge materials for high‐performance flexible battery‐type supercapacitors

Erçarıkcı

Aksu

Topç̧u

et al. 2022

Intl J of Energy Research

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In this work, iron and zinc phosphite [FeP and Zn 3 P 2 (ZnP)] crystals were individually decorated on a flexible, freestanding, and three-dimensional (3D) graphene sponge material (GSM) through a facile and cost-effective electrodeposition method. With the synergistic effect between metal phosphite (MP) particles and graphene, 3D FeP/GSM and ZnP/GSM electrodes displayed excellent electrochemical performances with high specific capacitances of 1872 and 908 F/g at a current density of 1 A/g and remarkable cycling stabilities (85% and 70% retention after 10 000 cycles), respectively. Owing to their superior properties, two asymmetric supercapacitor (ASC) circuits were assembled by employing FeP/GSM and ZnP/GSM as the positive electrodes and GSM as the negative electrode. The FeP/GSM//GSM and ZnP/GSM//GSM ASCs exhibited high energy densities of 265 and 62 Wh/kg with high power densities of 5545 and 3050 W/kg, respectively. Furthermore, as-designed devices showed great stability as retaining 80% and 70% of their initial capacitance after a consecutive 10 000 cycles of galvanostatic charge-discharge processes. These results demonstrated that MP/GSMs can be used as promising electrode materials for flexible ASC applications.

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“…AA electrochemical detection can be performed in two possible ways, (i) enzymatic and (ii) non-enzymatic. [4][5][6] Among these two, the enzymatic sensors have major disadvantages due to the high cost, limited working conditions, and lack of reproducibility. On the other hand, non-enzymatic detection holds significance due to its stability and high sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and application of mixed-spinel magnesioferrite: structural, vibrational, magnetic, and electrochemical sensing properties

Padhan

Rajaitha

Nayak

et al. 2023

Mater. Chem. Front.

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Graphene paper with electrodeposited NiCo2S4 nanoparticles as a novel flexible sensor for simultaneous detection of folic acid and ascorbic acid

Cited by 17 publications

References 58 publications

Three-Dimensional ZnCo-MOF Modified Graphene Sponge: Flexible Electrode Material for Symmetric Supercapacitor

Three-Dimensional ZnCo-MOF Modified Graphene Sponge: Flexible Electrode Material for Symmetric Supercapacitor

Design of metal phosphite decorated sponge materials for high‐performance flexible battery‐type supercapacitors

Synthesis and application of mixed-spinel magnesioferrite: structural, vibrational, magnetic, and electrochemical sensing properties

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