Voltammetric detection of gliclazide and glibenclamide with graphite screen-printed electrode modified with nanopetal-structured MoWS2

Jahani, Peyman Mohammadzadeh; Tajik, Somayeh; Beitollahi, Hadi; Mohammadi, Somayeh; Aflatoonian, Mohammad Reza

doi:10.1007/s11164-019-03993-z

Cited by 7 publications

(8 citation statements)

References 54 publications

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“…Figure 2A displays the XRD patterns of MWS, MXene and MWSM stacked together. The formation of MWS nanosheets (along (002) plane) was verified by the JCPDS card no: 37‐1492 and 08‐0237, which corresponds to MoS 2 and WS 2 , respectively, and moreover matching with all the appeared peaks in it 30 . From the literature, peaks at 14.37° and 14.32° of MoS 2 and WS 2 are the first diffraction peaks correspond to (002) plane.…”

Section: Resultsmentioning

confidence: 67%

“…The formation of MWS nanosheets (along (002) plane) was verified by the JCPDS card no: 37-1492 and 08-0237, which corresponds to MoS 2 and WS 2 , respectively, and moreover matching with all the appeared peaks in it. 30 From the literature, peaks at 14.37 and 14.32 of MoS 2 and WS 2 are the first diffraction peaks correspond to (002) plane. Likewise, the first diffraction peak of MWS at 13.8 signifies the slight red shift which can be accounted for the larger interlayer spacing as well as strain.…”

Section: Structural Characterizationmentioning

confidence: 99%

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Architecturally robust MoWS₂ and Ti₃C₂T_x MXene nanosheets hybrid for high‐performance energy storage and conversion applications

Patra

Rout

2022

Energy Storage

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The quench for the unremitting energy demand can be gratified by finding various substitute renewable energy sources and consequently safekeeping of these energies by energy storage devices. A variety of transition metal dichalcogenide (TMDC) materials are being explored for the application of water splitting and supercapacitor among which MoWS2 has gained its spot with potential tunable properties. Herein, the synthesis of MoWS2 and its nanocomposite with Ti3C2Tx MXene sheets is carried out by a simplistic hydrothermal method involving two steps. The structural and morphological characteristics were investigated through several characterization tools like powder X‐ray diffraction (pXRD), field emission scanning electron microscopy (FESEM), Raman spectroscopy and X‐ray photoelectron spectroscopy (XPS). The MXene sheets act as a template for the growth of MoWS2 (MWS) nanosheets and could exhibit extraordinary supercapacitive and electrocatalytic activity. The highest specific capacitance achieved by the pseudocapacitive MoWS2@MXene (MWSM) was 259 F/g @0.2 A/g. Then the above‐mentioned negative electrode was again taken for asymmetric studies where CoSe2@CNT@rGO was preferred as a positive site electrode and the asymmetric device showed a specific energy of 14 Wh/kg at a specific power of 8 KW/kg with an excellent cycling stability and coulombic efficiency of 93% and 96% which was measured for 6000 cycles. The hydrogen evolution reaction (HER) studies displayed that only 186 mV of overpotential was required to attain 10 mA/cm2 of current density. The electrocatalyst also achieved a small Tafel slope of 52 mV/dec along with exceptional stability upto 12 hours. High porosity, ample electrochemical active sites, rapid charge transfer kinetics and barrier‐free passage for ion transfer resulted in the enhanced electrochemical activity of MoWS2@MXene electrode/electrocatalyst.

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Section: Resultsmentioning

confidence: 67%

Section: Structural Characterizationmentioning

confidence: 99%

Architecturally robust MoWS₂ and Ti₃C₂T_x MXene nanosheets hybrid for high‐performance energy storage and conversion applications

Patra

Rout

2022

Energy Storage

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“…Therefore, to clarify the physical properties of Mo (1-x) W x S 2 , we employed a combinatorial film deposition specialized for evaluation in whole W concentration range (2). This method can produce continuous composition gradient film in which the W concentration is changed from 0 to 100% in one sample (3)(4)(5). In addition, it is expected that we can control the physical properties continuously within the film.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Mo_(1-x)W _x s Alloy Fabricated By Combinatorial Film Deposition

et al. 2021

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We report on the combinatorial film formation of Mo (1-x) W x S 2 alloy with RF magnetron sputtering, and its evaluation by X-ray photoelectron spectroscopy, X-ray diffraction, Raman spectroscopy, and spectroscopic ellipsometry. We confirmed the composition gradient in the sample. In addition, Raman peak derived from the 1T structure was observed especially in the W-rich composition region although majority was from 2H. The concave-up bowing in the bandgap for Mo (1-x) W x S 2 was confirmed. However, the bandgap for the 100% MoS 2 and WS 2 were slightly smaller than the reported value, and we consider that it is because of the phase transition from 2H to 1T structure.

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“…Recent studies strongly focused on the graphene nanoribbons (GNRs), narrow and straight edged stripes of graphene with edge dependent features as the alternative to replace the graphene nanosheets [18]. Some researchers showed that GNRs have much popularity in the electrochemical sensors because of their acceptable characteristics, including the increased mechanical strength, high available surface area, several straight edges, and good electrical conductivity [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Treated Screen Printed Electrodes Based on Electrochemically Reduced Graphene Nanoribbons for the Sensitive Voltammetric Determination of Dopamine in the Presence of Uric Acid

2020

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In this research, the graphene oxide nanoribbons (GONRs) were substantially synthesized by the oxidative longitudinal unzipping of the multi‐walled carbon nanotubes (MWCNTs). Then, a direct electrochemical technique was employed for reducing GONRs adsorbed on the screen printed carbon electrode (SPCE). Electrochemical reduction effectively eliminated the oxygen‐containing groups in the GONRs and produced the electrochemically reduced graphene nanoribbons (ERGNRs). Field emission scanning electron microscopy (FE‐SEM), transmission electron microscopy (TEM), and X‐ray diffraction (XRD) were employed to characterize the materials. The modified SPCE with ERGNRs (ERGNRs/SPCE) displayed acceptable electrocatalytic characteristics towards the oxidation of dopamine (DA) and uric acid (UA) and applied to the simultaneous determination of these two analytes. ERGNRs/SPCE has a peak potential difference of 245 mV between DA and UA. The anodic peak currents of DA and UA were linear within the concentration ranges between 0.5 and 300.0 μM and 1.0 to 400.0 μM in phosphate buffer (pH=7.0) respectively. The detection limit of the technique for DA is 0.15 μM (S/N=3) and for UA is 0.3 μM (S/N=3). The proposed approach has been applied to the determination of DA and UA in real samples and generated acceptable outputs.

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Voltammetric detection of gliclazide and glibenclamide with graphite screen-printed electrode modified with nanopetal-structured MoWS2

Cited by 7 publications

References 54 publications

Architecturally robust MoWS₂ and Ti₃C₂T_x MXene nanosheets hybrid for high‐performance energy storage and conversion applications

Architecturally robust MoWS₂ and Ti₃C₂T_x MXene nanosheets hybrid for high‐performance energy storage and conversion applications

Evaluation of Mo_(1-x)W _x s Alloy Fabricated By Combinatorial Film Deposition

Treated Screen Printed Electrodes Based on Electrochemically Reduced Graphene Nanoribbons for the Sensitive Voltammetric Determination of Dopamine in the Presence of Uric Acid

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Voltammetric detection of gliclazide and glibenclamide with graphite screen-printed electrode modified with nanopetal-structured MoWS2

Cited by 7 publications

References 54 publications

Architecturally robust MoWS2 and Ti3C2Tx MXene nanosheets hybrid for high‐performance energy storage and conversion applications

Architecturally robust MoWS2 and Ti3C2Tx MXene nanosheets hybrid for high‐performance energy storage and conversion applications

Evaluation of Mo(1-x)W x s Alloy Fabricated By Combinatorial Film Deposition

Treated Screen Printed Electrodes Based on Electrochemically Reduced Graphene Nanoribbons for the Sensitive Voltammetric Determination of Dopamine in the Presence of Uric Acid

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Product

Resources

About

Architecturally robust MoWS₂ and Ti₃C₂T_x MXene nanosheets hybrid for high‐performance energy storage and conversion applications

Architecturally robust MoWS₂ and Ti₃C₂T_x MXene nanosheets hybrid for high‐performance energy storage and conversion applications

Evaluation of Mo_(1-x)W _x s Alloy Fabricated By Combinatorial Film Deposition