Synthesis, characterization and supercapacitive application of nanocauliflower-like cobalt tungstate thin films by successive ionic layer adsorption and reaction (SILAR) method

Bagwade, P.P.; Malavekar, D.B.; Ubale, S.B.; Bulakhe, Ravindra N.; In, I.; Patil, Umakant M.; Lokhande, C.D.

doi:10.1016/j.electacta.2022.139933

Cited by 19 publications

(7 citation statements)

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“…Figure b shows the GCD curves of polymer electrodes within the potential window of −1.0 to 1.0 V at different current densities. The observed anodic and cathodic peaks indicate that the electrodes exhibit pseudo-capacitive properties (Figure b) . EIS analysis shows that the equivalent series resistance ( R ESR ) of the solid products is 10.94 Ω (Figure c), indicating the high charge transfer rate of the solid products .…”

Section: Resultsmentioning

confidence: 95%

“…The observed anodic and cathodic peaks indicate that the electrodes exhibit pseudo-capacitive properties (Figure 8b). 71 EIS analysis shows that the equivalent series resistance (R ESR ) of the solid products is 10.94 Ω (Figure 8c), indicating the high charge transfer rate of the solid products. 28 Meanwhile, the linear relationship between 10 and 1 Hz in low frequency also indicates the pseudo-capacitive properties of the oxidation products (Figure 8c).…”

Section: Characterization Studies Of the Oxidation Productsmentioning

confidence: 99%

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Oxidative Desulfurization of Benzothiophene by Persulfate and Cu-Loaded g-C₃ N₄ via the Polymerization Pathway

Zhi

Zhang

et al. 2023

Ind. Eng. Chem. Res.

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Turning aromatic sulfur impurities to value-added polymers is a promising technology for fuel desulfurization. In this study, Cu(I,II)@g-C 3 N 4 plates prepared via facile calcination show high reactivity in catalytic oxidation of benzothiophene (BT) by persulfate in a mixture of MeCN/H 2 O (v/v = 50/50). Quenching experiments rule out the primary contributions of SO 4•− , • OH, and O 2•− to BT oxidation and confirm the presence of carbon-centered radicals during the desulfurization process. XPS and Raman analyses reveal that Cu(I) and graphitic-N are reactive sites for persulfate activation, accompanied with moderate activation of the peroxo group in persulfate via the nonradical pathway. Solid characterizations indicate the formation of polybenzothiophene S,S-dioxide during the oxidation process, which further reveals that the moderately activated persulfate abstracts H from BT to form a BT radical cation, followed by subsequent polymerization of BT radical cations to a BT tetramer, and then the BT tetramer is further oxidized to a BT S,S-dioxide tetramer. The high electrochemical stability and pseudo-capacitive properties of the obtained polymers also imply their high potential to be used for capacitors. This work provides new insight on turning aromatic sulfur impurities in fuels to "treasures".

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Section: Resultsmentioning

confidence: 95%

Section: Characterization Studies Of the Oxidation Productsmentioning

confidence: 99%

Oxidative Desulfurization of Benzothiophene by Persulfate and Cu-Loaded g-C₃ N₄ via the Polymerization Pathway

Zhi

Zhang

et al. 2023

Ind. Eng. Chem. Res.

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“…The SILAR method is advantageous in terms of its low cost, large area deposition, use of a variety of substrates and room temperature (RT) deposition, etc. 34 As a result, a number of metal chalcogenides have been deposited using the SILAR method. However, in a SILAR, the growth process is hindered at every cycle, leading to low crystallinity of the deposited materials.…”

Section: Synthesismentioning

confidence: 99%

Versatility of group VI layered metal chalcogenide thin films synthesized by solution-based deposition methods

et al. 2023

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“…However, these studies demonstrated that single metal oxides also demonstrated effective electrochemical performance for energy storage. The crystalline structure of metal tungstates, along with the presence of binary metal, contributes to an increase in Cs and their stability. , …”

Section: Introductionmentioning

confidence: 99%

Ion-by-Ion Adsorption Process and Reaction for the Synthesis of Hierarchical Manganese Tungstate (MnWO₄) Microflowers as an Energy-Efficient Electrode for Supercapacitors

Shembade,

Moholkar,

Ambi

et al. 2024

ACS Appl. Eng. Mater.

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For the first time, manganese tungstate (MnWO 4 ) electrodes are successfully synthesized by the successive ionic layer adsorption and reaction (SILAR) method. This study is mainly focused on synthesized hierarchical MnWO 4 microflowers (MFs) for electrochemical supercapacitor application. The crystalline structure, morphology, presence of functional groups, stretching and bending vibration, and availability of chemical states present in the MnWO 4 MFs are investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared, Raman, and X-ray photoelectron spectroscopy, respectively. In addition, the resultant materials undergo electrochemical analysis using a three-electrode system. As a result, the MnW-50 electrode reveals a maximum specific capacitance (Cs) and capacity (Csp) of 698 F/g and 87 mAh/g at 5 mA/cm 2 with moderate energy density (ED) and power density (PD) of 19 Wh/kg and 700 W/kg, respectively. Furthermore, the aqueous hybrid device is fabricated using MnWO 4 MFs as a cathode and reduced graphene oxide (rGO) as an anode material, which reveals the maximum performance of the Cs and Csp of 206 F/g and 87 mAh/g at 5 mV/s and 185 F/g and 70 mAh/g with sufficient ED, and PD of 45 Wh/kg and 1960 W/kg at 5 mA/cm 2 , respectively. The aforementioned results indicate the benefits and improved electrochemical efficiency of MnWO 4 MFs as cathodes for hybrid supercapacitors.

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Synthesis, characterization and supercapacitive application of nanocauliflower-like cobalt tungstate thin films by successive ionic layer adsorption and reaction (SILAR) method

Cited by 19 publications

References 50 publications

Oxidative Desulfurization of Benzothiophene by Persulfate and Cu-Loaded g-C₃ N₄ via the Polymerization Pathway

Oxidative Desulfurization of Benzothiophene by Persulfate and Cu-Loaded g-C₃ N₄ via the Polymerization Pathway

Versatility of group VI layered metal chalcogenide thin films synthesized by solution-based deposition methods

Ion-by-Ion Adsorption Process and Reaction for the Synthesis of Hierarchical Manganese Tungstate (MnWO₄) Microflowers as an Energy-Efficient Electrode for Supercapacitors

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Synthesis, characterization and supercapacitive application of nanocauliflower-like cobalt tungstate thin films by successive ionic layer adsorption and reaction (SILAR) method

Cited by 19 publications

References 50 publications

Oxidative Desulfurization of Benzothiophene by Persulfate and Cu-Loaded g-C3 N4 via the Polymerization Pathway

Oxidative Desulfurization of Benzothiophene by Persulfate and Cu-Loaded g-C3 N4 via the Polymerization Pathway

Versatility of group VI layered metal chalcogenide thin films synthesized by solution-based deposition methods

Ion-by-Ion Adsorption Process and Reaction for the Synthesis of Hierarchical Manganese Tungstate (MnWO4) Microflowers as an Energy-Efficient Electrode for Supercapacitors

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Product

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Oxidative Desulfurization of Benzothiophene by Persulfate and Cu-Loaded g-C₃ N₄ via the Polymerization Pathway

Oxidative Desulfurization of Benzothiophene by Persulfate and Cu-Loaded g-C₃ N₄ via the Polymerization Pathway

Ion-by-Ion Adsorption Process and Reaction for the Synthesis of Hierarchical Manganese Tungstate (MnWO₄) Microflowers as an Energy-Efficient Electrode for Supercapacitors