Selective synthesis of WO3and W18O49nanostructures: ligand-free pH-dependent morphology-controlled self-assembly of hierarchical architectures from 1D nanostructure and sunlight-driven photocatalytic degradation

Shirke, Yogita M.; Mukherjee, Shatabdi Porel

doi:10.1039/c6ce02518h

Cited by 49 publications

(39 citation statements)

References 81 publications

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“…Two broad bands located at 100–500 cm −1 and 600–1000 cm −1 were obtained in the Raman spectrum for both samples, resulting from a wide range of W−O‐W bond lengths of W 18 O 49 . This result confirmed the samples to be the monoclinic W 18 O 49 structure . Meanwhile, sample W1G3 also showed Raman peaks at 1350 and 1583 cm −1 , which correspond to D‐band and G‐band of rGO, respectively (Figure ).…”

Section: Resultssupporting

confidence: 65%

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High Catalytic Activity of W₁₈ O₄₉ Nanowire-Reduced Graphite Oxide Composite Counter Electrode for Dye-Sensitized Solar Cells

et al. 2017

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The W18O49 nanowire (NW)‐reduced graphite oxide (W18O49‐rGO) nanocomposite was prepared by a facile solvothermal reaction. The W18O49 NWs were stably dispersed on the surface of rGO, and the content of W18O49 NWs in the composite can be tailored by controlling the mass ratio of reactants (WCl6 and graphite oxide). Employing the W18O49‐rGO nanocomposite with the proper W18O49 NW content of 33% as a counter electrode of dye‐sensitized solar cells (DSSCs), it gets a photoelectrical conversion efficiency (η) of 7.23%, which is close to that of Pt‐based DSSC (7.39%). The high efficiency of DSSCs based on W18O49‐rGO counter electrode is contributed to the intrinsic electrocatalytic activity of W18O49 NWs and excellent electron‐transfer characteristics of rGO. The first‐principles calculations have been first employed to investigate the adsorption energy between I3− molecule and W18O49 NW to explain its good catalytic activity. The cyclic voltammetry (CV), electrochemical impedance spectra (EIS), and Tafel polarization tests can further identify that the W18O49‐rGO counter electrode has high electrocatalytic activity for the reduction of I3− and low interface charge transfer impedance. It is believed that the W18O49‐rGO nanocomposite can be used as a promising counter electrode material for DSSCs.

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Section: Resultssupporting

confidence: 65%

“…This result confirmed the samples to be the monoclinic W 18 O 49 structure. [29][30][31] Meanwhile, sample W1G3 also showed Raman peaks at 1350 and 1583 cm À1 , which correspond to D-band and G-band of rGO, respectively ( Figure 4). Similar peaks were also observed in the Raman spectra of W3G1, W1G1 and W1G4 ( Figure S2).…”

Section: Resultsmentioning

confidence: 99%

High Catalytic Activity of W₁₈ O₄₉ Nanowire-Reduced Graphite Oxide Composite Counter Electrode for Dye-Sensitized Solar Cells

et al. 2017

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“…The Cd3 d spectrum exhibits two strong fitted peaks centered at 405.2 eV and 411.9 eV, proving the presence of Cd 2+ ions [ 19 ]. The W4 f spectrum exhibits two strong fitted peaks centered at 35.5 eV and 37.6 eV, which are attributed to the 4 f 7/2 and 4 f 5/2 spin orbit of W 6+ ions in the isopolytungstate [ 28 , 29 ], respectively. Additionally, the EuCrMo 6 microflakes were also characterized by XPS.…”

Section: Resultsmentioning

confidence: 99%

Controlled Synthesis and Properties of 3d–4f Metals Co-doped Polyoxometalates-Based Materials

et al. 2020

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It is challenging to explore and prepare polyoxometalates-based nanomaterials (PNMs) with controllable morphologies and diversiform components. Herein, 3d–4f metals are introduced into isopolyoxometalates and Anderson-type polyoxometalates, CeCdW12 nanoflower and EuCrMo6 microflaky have been fabricated respectively. A series of control experiments are carried out to identify the impact factors on the rare morphologies in PNMs. Furthermore, upon excitation at 396 nm, the emission spectrum of EuCrMo6 displays five prominent f − f emitting peaks at 674, 685, 690, 707, and 734 nm that are assigned to Eu3+ 5D0 → 7FJ (J = 0, 1, 2, 3, 4) transitions. Meanwhile, the VSM results show that the Cr+3 ions in EuCrMo6 display anti-ferromagnetic interactions when the temperature is lower than − 17.54 K. After rising temperature, this material exhibits paramagnetic property. This work opens up strategies toward the brand new morphologies and components of PNMs, endowing this kind of material with new functions.

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“…The combination of these nanostructures with nanocarbons in general and graphene derivatives in particular have attracted considerable interest in the scientific community. Graphene oxide (GO) is a single or few layers of oxidized graphite, just like graphene considered as a single layer of graphite [7]. It has been defined as an important precursor of graphene and the basic material for the development of graphene-based nanocomposites [8].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of WO₃ Nanostructures and Their Nanocomposites with Graphene Derivatives via Novel Chemical Approach

Hatel¹,

Baïtoul²

2021

Nanomechanics - Theory and Application

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Trioxide Tungsten (WO3), an n-type semiconductor that exhibits a wide band gap of 2.5 to 3.6 eV, has attracted special attention from the scientific community. This attraction is due to its manifold properties, which not only follow the development of technologies, but accelerate it. There are several methods to synthesize WO3 nanostructures with various morphologies. In the present study, for the first time, a novel chemical method was developed for the preparation of WO3 nanostructures by using tungsten carbide (WC) as precursor. This novel approach has many advantages such as high yields, simple methodology and easy work up. Moreover, graphene oxide coated with WO3 nanostructured is prepared via in-situ and ex-situ chemical approaches followed by subsequent thermal treatment at 500°C. The obtained samples were characterized by different techniques to confirm the transformation of WC to WO3 nanostructures and the formation of their nanocomposites with graphene derivatives.

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Selective synthesis of WO₃and W₁₈O₄₉nanostructures: ligand-free pH-dependent morphology-controlled self-assembly of hierarchical architectures from 1D nanostructure and sunlight-driven photocatalytic degradation

Cited by 49 publications

References 81 publications

High Catalytic Activity of W₁₈ O₄₉ Nanowire-Reduced Graphite Oxide Composite Counter Electrode for Dye-Sensitized Solar Cells

High Catalytic Activity of W₁₈ O₄₉ Nanowire-Reduced Graphite Oxide Composite Counter Electrode for Dye-Sensitized Solar Cells

Controlled Synthesis and Properties of 3d–4f Metals Co-doped Polyoxometalates-Based Materials

Synthesis of WO₃ Nanostructures and Their Nanocomposites with Graphene Derivatives via Novel Chemical Approach

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Selective synthesis of WO3and W18O49nanostructures: ligand-free pH-dependent morphology-controlled self-assembly of hierarchical architectures from 1D nanostructure and sunlight-driven photocatalytic degradation

Cited by 49 publications

References 81 publications

High Catalytic Activity of W18 O49 Nanowire-Reduced Graphite Oxide Composite Counter Electrode for Dye-Sensitized Solar Cells

High Catalytic Activity of W18 O49 Nanowire-Reduced Graphite Oxide Composite Counter Electrode for Dye-Sensitized Solar Cells

Controlled Synthesis and Properties of 3d–4f Metals Co-doped Polyoxometalates-Based Materials

Synthesis of WO3 Nanostructures and Their Nanocomposites with Graphene Derivatives via Novel Chemical Approach

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Selective synthesis of WO₃and W₁₈O₄₉nanostructures: ligand-free pH-dependent morphology-controlled self-assembly of hierarchical architectures from 1D nanostructure and sunlight-driven photocatalytic degradation

High Catalytic Activity of W₁₈ O₄₉ Nanowire-Reduced Graphite Oxide Composite Counter Electrode for Dye-Sensitized Solar Cells

High Catalytic Activity of W₁₈ O₄₉ Nanowire-Reduced Graphite Oxide Composite Counter Electrode for Dye-Sensitized Solar Cells

Synthesis of WO₃ Nanostructures and Their Nanocomposites with Graphene Derivatives via Novel Chemical Approach