Improved photocatalytic activity of Z-scheme β-Bi2O3/Bi2WO6 nanocomposites from band bending of p-n heterojunction

Li, C. X.; Song, Shaojia; Shi, D. S.; Ying, Yuet Lee; Zhang, X. X.; Wei, Junqi; Hong, Bo; Xu, Jingcai; Wang, P. F.; Wang, X. Q.

doi:10.1007/s11051-020-04873-z

Cited by 12 publications

(5 citation statements)

References 45 publications

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“…31 The cell parameters were calculated to be a = 5.441 Å, b = 16.42 Å, and c = 5.45 Å which were in good agreement with those of JCPDS No. 39‐256 in literatures 24,25,32 . CBWO and CBWOA showed almost the same XRD pattern with BWO, without apparent characteristic peaks of Co 3 O 4 .…”

Section: Resultsmentioning

confidence: 64%

Au and Co₃O₄ anchored Bi₂WO₆ with enhanced electron paramagnetic resonance, surface plasmon resonance, nonlinear and magnetic properties

Chen

Miao

et al. 2022

J Am Ceram Soc.

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The combination of surface plasmon resonance (SPR) effect with hetero‐p–n structure shows promising benefits to optical linear and nonlinear properties. In this study, Au nanoparticles (NPs) decorated p–n hetero‐structured Co3O4/Bi2WO6 composite was synthesized and characterized in terms of the optical linear and nonlinear and magnetic properties, morphology, electron transition, charge transfer, energy band gap, polarizability, SPR effect, and oxygen vacancies using scanning electron microscopy, X‐ray photoelectron spectroscopy, electron paramagnetic resonance spectroscopy, Z‐scan, ultraviolet–visible spectra, and vibrating sample magnetometer. The combination of Co3O4 provided active 3d electrons transition and charge transfer which increased carriers’ concentration and reduced the energy band gap. Au SPR enhanced the internal polarization and strengthened the built‐in electric field, yielding strong nonlinear behavior. In addition, magnetic Co3O4 endowed sample with room‐temperature ferromagnetism which was obviously strengthened by Au NPs. The obtained sample is promising for laser and photonics applications.

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Section: Resultsmentioning

confidence: 64%

Au and Co₃O₄ anchored Bi₂WO₆ with enhanced electron paramagnetic resonance, surface plasmon resonance, nonlinear and magnetic properties

Chen

Miao

et al. 2022

J Am Ceram Soc.

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“…The fitted V 2p XPS spectrum of VN@NC is shown in Figure 4d, where the peaks at 515 and 523 eV correspond to V 2p 3/2 and V 2p 1/2 orbitals, respectively, and the peaks at 513.6 and 521.2 eV result from V−N bonds, further indicating the formation of VN [32,33] . The peaks at 515.2 and 522.8 eV were attributed to the V−N−O bond, and the peaks at 516.8 and 524.5 eV ‐ to V−O bond, caused by air oxidation [17] …”

Section: Resultsmentioning

confidence: 97%

“…Vanadium nitride (VN) [13,14] has been widely used as a cathode material for lithium‐sulfur batteries due to its high catalytic activity and significant adsorption capacity for polysulfides [15–17] . However, poor dispersion of VN results in low catalytic activity, which limits its practical application.…”

Section: Introductionmentioning

confidence: 99%

Highly‐Dispersed Vanadium Nitride Supported on Porous Nitrogen‐Doped Carbon Material as a High‐Performance Cathode for Lithium‐Sulfur Batteries

Wang

Sun

et al. 2022

ChemistrySelect

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Transition metals and their compounds supported on carbon materials are widely used as cathodes for lithium-sulfur batteries. Vanadium nitride is considered to be a promising cathode because of its good adsorption capacity for lithium polysulfides and high catalytic activity, but in practice it usually shows insufficient electrical conductivity and low electrocatalytic activity due to particles agglomeration. In this study, highly dispersed vanadium nitride supported on porous nitrogen-doped carbon was prepared via one-pot pyrolysis in a molten salt medium. Physical characterization revealed VN particles with a uniform size distribution of ca. 10 nm well dispersed on the carbon surface. When used as a cathode for LiÀ S battery, the material delivered a specific discharge capacity of 1050 mAh g À 1 at 0.2 C and good rate performance. During the stability test over 500 continuous cycles, the average decay rate was 0.059 % per cycle. The study demonstrates prospective application of the newly developed electrocatalytic material as a cathode in lithium-sulfur batteries.

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“…To overcome the poor affinity of polysulfides, polar materials (metal oxides/sulfides, single metal, and heteroatom doping) are emerging to trap polysulfides by chemical interaction and retard serious dissolution [29–35] . Among them, vanadium‐based compounds possess rich chemistry properties because of the variable valences of vanadium, and they are widely used as promising candidates for electrochemical catalysts [36–39] . Chemically active vanadium sites could serve as polysulfides trapper to mitigate the shuttle effect in Li‐S batteries.…”

Section: Introductionmentioning

confidence: 99%

Proton‐Induced Defect‐Rich Vanadium Oxides as Reversible Polysulfide Conversion Sites for High‐Performance Lithium Sulfur Batteries

Chen

Liang

Yang

et al. 2023

Chemistry A European J

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Lithium‐sulfur (Li‐S) batteries have attracted attention due to their high theoretical energy density, natural abundance, and low cost. However, the diffusion of polysulfides decreases the utilization and further degrades the battery's life. We have successfully fabricated a defect‐rich layered sodium vanadium oxide with proton doping (HNVO) nanobelt and used it as the functional interface layer on the separator in Li‐S batteries. Benefiting from the abundant defects of NVO and the catalytic activity of metal vanadium in the electrochemical process, the shuttle of polysulfides was greatly decreased by reversible chemical adsorption. Moreover, the extra graphene layer contributes to accelerating the charge carrier at high current densities. Therefore, a Li‐S battery with G@HNVO delivers a high capacity of 1494.8 mAh g−1 at 0.2 C and a superior cycling stability over 700 cycles at 1 C. This work provides an effective strategy for designing the electrode/separator interface layer to achieve high‐performance Li‐S batteries.

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Improved photocatalytic activity of Z-scheme β-Bi2O3/Bi2WO6 nanocomposites from band bending of p-n heterojunction

Cited by 12 publications

References 45 publications

Au and Co₃O₄ anchored Bi₂WO₆ with enhanced electron paramagnetic resonance, surface plasmon resonance, nonlinear and magnetic properties

Au and Co₃O₄ anchored Bi₂WO₆ with enhanced electron paramagnetic resonance, surface plasmon resonance, nonlinear and magnetic properties

Highly‐Dispersed Vanadium Nitride Supported on Porous Nitrogen‐Doped Carbon Material as a High‐Performance Cathode for Lithium‐Sulfur Batteries

Proton‐Induced Defect‐Rich Vanadium Oxides as Reversible Polysulfide Conversion Sites for High‐Performance Lithium Sulfur Batteries

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Improved photocatalytic activity of Z-scheme β-Bi2O3/Bi2WO6 nanocomposites from band bending of p-n heterojunction

Cited by 12 publications

References 45 publications

Au and Co3O4 anchored Bi2WO6 with enhanced electron paramagnetic resonance, surface plasmon resonance, nonlinear and magnetic properties

Au and Co3O4 anchored Bi2WO6 with enhanced electron paramagnetic resonance, surface plasmon resonance, nonlinear and magnetic properties

Highly‐Dispersed Vanadium Nitride Supported on Porous Nitrogen‐Doped Carbon Material as a High‐Performance Cathode for Lithium‐Sulfur Batteries

Proton‐Induced Defect‐Rich Vanadium Oxides as Reversible Polysulfide Conversion Sites for High‐Performance Lithium Sulfur Batteries

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Product

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Au and Co₃O₄ anchored Bi₂WO₆ with enhanced electron paramagnetic resonance, surface plasmon resonance, nonlinear and magnetic properties

Au and Co₃O₄ anchored Bi₂WO₆ with enhanced electron paramagnetic resonance, surface plasmon resonance, nonlinear and magnetic properties