Structure-retentive synthesis of a highly ordered mesoporous Nb<sub>2</sub>O<sub>5</sub>/N-doped graphene nanocomposite with superior interfacial contacts and improved visible-light photocatalysis

Huang, Hui; Zhou, Jun; Zhou, Jie; Zhu, Mingshan

doi:10.1039/c9cy00555b

Cited by 8 publications

(7 citation statements)

References 49 publications

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“…Owing to its flexibility in morphological, electronic, and structural properties, Nb2O5 is a promising candidate to design an effective heterojunction. Huang and coauthors reported a synergic combination of highly ordered mesoporous Nb2O5 (MNb) nanostructure to two-dimensional N-doped graphene (NGR) through a good interfacial connection ( Figure 3) [28]. UV/visible diffuse reflectance spectroscopy evidenced gradual shifts to longer wavelengths as the NGR quantity was increased, so the band gap energies were shift from 3.12 eV up to 2.67 eV.…”

Section: Niobium Pentoxide (Nb 2 O 5 )mentioning

confidence: 99%

Recent Advances in Niobium-Based Materials for Photocatalytic Solar Fuel Production

et al. 2020

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The search for renewable and clean energy sources is a key aspect for sustainable development as energy consumption has continuously increased over the years concomitantly with environmental concerns caused by the use of fossil fuels. Semiconductor materials have great potential for acting as photocatalysts for solar fuel production, a potential energy source able to solve both energy and environmental concerns. Among the studied semiconductor materials, those based on niobium pentacation are still shallowly explored, although the number of publications and patents on Nb(V)-based photocatalysts has increased in the last years. A large variety of Nb(V)-based materials exhibit suitable electronic/morphological properties for light-driving reactions. Not only the extensive group of Nb2O5 polymorphs is explored, but also many types of layered niobates, mixed oxides, and Nb(V)-doped semiconductors. Therefore, the aim of this manuscript is to provide a review of the latest developments of niobium based photocatalysts for energy conversion into fuels, more specifically, CO2 reduction to hydrocarbons or H2 evolution from water. Additionally, the main strategies for improving the photocatalytic performance of niobium-based materials are discussed.

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Section: Niobium Pentoxide (Nb 2 O 5 )mentioning

confidence: 99%

Recent Advances in Niobium-Based Materials for Photocatalytic Solar Fuel Production

et al. 2020

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“…The Nb 3d spectrum (Fig. 4 d) exhibited two significant peaks at around 207.43 and 210.13 eV, corresponding to 3d 5/2 and 3d 3/2 states of Nb 5+ , respectively 60 . The O 1s XPS spectrum (Fig.…”

Section: Resultsmentioning

confidence: 98%

Electrospinning preparation of g-C3N4/Nb2O5 nanofibers heterojunction for enhanced photocatalytic degradation of organic pollutants in water

Wang

Han

2021

Sci Rep

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In this study, graphitic carbon nitride (g-C3N4) and niobium pentoxide nanofibers (Nb2O5 NFs) heterojunction was prepared by means of a direct electrospinning approach combined with calcination process. The characterizations confirmed a well-defined morphology of the g-C3N4/Nb2O5 heterojunction in which Nb2O5 NFs were tightly attached onto g-C3N4 nanosheets. Compared to pure g-C3N4 and Nb2O5 NFs, the as-prepared g-C3N4/Nb2O5 heterojunction exhibited remarkably enhanced photocatalytic activity for degradation of rhodamine B and phenol under visible light irradiation. The enhanced catalytic activity was attributed predominantly to the synergistic effect between g-C3N4 sheets and Nb2O5 NFs, which promoted the transferring of carriers and prohibited their recombination, confirmed by the measurement of transient photocurrent responses and photoluminescence spectra. In addition, the active species trapping experiments indicated that superoxide radical anion (·O2–) and hole (h+) were the major active species contributing to the photocatalytic process. With its high efficacy and ease of preparation, g-C3N4/Nb2O5 heterojunction has great potentials for applications in treatment of organic pollutants and conversion of solar energy.

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“…1,2 Among a variety of semiconductor photocatalysts, niobium pentoxide (Nb 2 O 5 ) as an n-type photocatalyst displays a lot of unique physicochemical properties, including excellent chemical and thermal stability, and relatively high photocatalytic activity, making it a suitable photocatalyst for photodegradation. 3,4 However, Nb 2 O 5 can only be activated under UVlight irradiation because of its large band gap of $3.1 eV, making its use of solar energy less effective. 5,6 Additionally, the efficiency of a photocatalytic reaction is limited by a high recombination rate of photo-induced electron-hole pairs formed in the photocatalytic processes.…”

Section: Introductionmentioning

confidence: 99%

Facile fabrication of Fe-doped Nb₂O₅ nanofibers by an electrospinning process and their application in photocatalysis

Wang

Han

et al. 2021

RSC Adv.

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Structure-retentive synthesis of a highly ordered mesoporous Nb₂O₅/N-doped graphene nanocomposite with superior interfacial contacts and improved visible-light photocatalysis

Abstract: A highly ordered mesoporous Nb2O5/N-doped graphene nanocomposite was constructed for efficient photocatalytic H2 evolution under irradiation of visible light.

Cited by 8 publications

References 49 publications

Recent Advances in Niobium-Based Materials for Photocatalytic Solar Fuel Production

Recent Advances in Niobium-Based Materials for Photocatalytic Solar Fuel Production

Electrospinning preparation of g-C3N4/Nb2O5 nanofibers heterojunction for enhanced photocatalytic degradation of organic pollutants in water

Facile fabrication of Fe-doped Nb₂O₅ nanofibers by an electrospinning process and their application in photocatalysis

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Structure-retentive synthesis of a highly ordered mesoporous Nb2O5/N-doped graphene nanocomposite with superior interfacial contacts and improved visible-light photocatalysis

Abstract: A highly ordered mesoporous Nb2O5/N-doped graphene nanocomposite was constructed for efficient photocatalytic H2 evolution under irradiation of visible light.

Cited by 8 publications

References 49 publications

Recent Advances in Niobium-Based Materials for Photocatalytic Solar Fuel Production

Recent Advances in Niobium-Based Materials for Photocatalytic Solar Fuel Production

Electrospinning preparation of g-C3N4/Nb2O5 nanofibers heterojunction for enhanced photocatalytic degradation of organic pollutants in water

Facile fabrication of Fe-doped Nb2O5 nanofibers by an electrospinning process and their application in photocatalysis

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Structure-retentive synthesis of a highly ordered mesoporous Nb₂O₅/N-doped graphene nanocomposite with superior interfacial contacts and improved visible-light photocatalysis

Facile fabrication of Fe-doped Nb₂O₅ nanofibers by an electrospinning process and their application in photocatalysis