Boosted CO<sub>2</sub> photoreduction to methane <i>via</i> Co doping in bismuth vanadate atomic layers

Wang, Kefu; Zhang, Ling; Su, Yang; Sun, Songmei; Wang, Qianqian; Wang, Haipeng; Wang, Wenzhong

doi:10.1039/c8cy00513c

Cited by 42 publications

(25 citation statements)

References 39 publications

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“…The two peaks 137.61 and 133.16 eV of P 2p (Figure 3C) manifest the presence of phosphate 36,37 . The deconvoluted O 1s spectra (Figure 3D) represent two peaks at 530.68 and 530.01 eV assigned to the P–O bond 33 and the V–O bond, 35 respectively. ICP‐OES was used to further ascertain the composition of the prepared Cr‐PV.…”

Section: Resultsmentioning

confidence: 95%

“…It can be assumed that the Cr 2p 3/2 and Cr 2p 1/2 photoelectron peaks are attributed to Cr(III) 34 . The high‐resolution spectra of V 2p (Figure 3B) present four peaks at 524.83, 523.73, 516.98, and 517.14 eV, respectively, attached to V 2p 1/2 and V 2p 3/2 of V 5+ 35 . The two peaks 137.61 and 133.16 eV of P 2p (Figure 3C) manifest the presence of phosphate 36,37 .…”

Section: Resultsmentioning

confidence: 98%

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Adsorption removal of methyl violet from aqueous solution by chromium phosphovanadate

Zhai

Zou

Liu

et al. 2020

Surface & Interface Analysis

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An effective adsorbent for methyl violet (MV), chromium phosphovanadate (named as Cr-PV) nanomaterials, was prepared by a simple coprecipitation strategy. The microstructure and morphology of as-synthesized Cr-PV were characterized by SEM, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared (FTIR), respectively, which was confirmed as nanosheet shapes. The adsorption behavior for MV from aqueous solutions was systematically investigated. The kinetic and equilibrium results indicate that the adsorption process follows pseudo-second-order kinetic model and Langmuir isotherm, respectively. Compared with PV and commercially available activated carbon, Cr-PV has preferable adsorption property to MV. The maximum adsorption capacity can reach 123.81 mg g −1 at room temperature. The thermodynamic parameters such as Gibbs free energy (ΔG ο), enthalpy (ΔH ο), and entropy change (ΔS ο) show that the adsorption of MV is an endothermic and spontaneous process. Moreover, the adsorptive behavior between Cr-PV and MV is monolayer adsorption and electrostatic interaction mechanism. Cr-PV, as a promising adsorbent with high adsorption capacity and fast adsorption rate, shows great potential for the removal of MV from wastewater.

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 98%

Adsorption removal of methyl violet from aqueous solution by chromium phosphovanadate

Zhai

Zou

Liu

et al. 2020

Surface & Interface Analysis

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“…The Co doping well‐adjusted the electronic structure of BiVO 4 atomic layers and increased the electron densities around O anions, facilitating the electron transfer to CO 2 molecules, which allowed a stable CH 4 production rate of 23.8 µmol g −1 h −1 , ≈3 times that of pristine BiVO 4 atomic layers. [ 200 ] Further, the effect of energy level depth of dopants on charge separation efficiency was clarified. [ 201 ] Li et al.…”

Section: Atomic‐level Surface Charge Separation Strategiesmentioning

confidence: 99%

Atomic‐Level Charge Separation Strategies in Semiconductor‐Based Photocatalysts

et al. 2021

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Semiconductor‐based photocatalysis as a productive technology furnishes a prospective solution to environmental and renewable energy issues, but its efficiency greatly relies on the effective bulk and surface separation of photoexcited charge carriers. Exploitation of atomic‐level strategies allows in‐depth understanding on the related mechanisms and enables bottom‐up precise design of photocatalysts, significantly enhancing photocatalytic activity. Herein, the advances on atomic‐level charge separation strategies toward developing robust photocatalysts are highlighted, elucidating the fundamentals of charge separation and transfer processes and advanced probing techniques. The atomic‐level bulk charge separation strategies, embodied by regulation of charge movement pathway and migration dynamic, boil down to shortening the charge diffusion distance to the atomic‐scale, establishing atomic‐level charge transfer channels, and enhancing the charge separation driving force. Meanwhile, regulating the in‐plane surface structure and spatial surface structure are summarized as atomic‐level surface charge separation strategies. Moreover, collaborative strategies for simultaneous manipulation of bulk and surface photocharges are also introduced. Finally, the existing challenges and future prospects for fabrication of state‐of‐the‐art photocatalysts are discussed on the basis of a thorough comprehension of atomic‐level charge separation strategies.

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“…In most efficient metal‐doped photocatalysts, the doped atoms can not only be served as trapping sites to accelerate electron–holes separation, but also promote the electrons and holes to migrate to the surface reactive site. [ 21,154–158 ] Due to the abundant unsaturated N sites, g‐C 3 N 4 can provide an excellent platform for metal doping. For instance, Xiong's group proposed that a metal‐to‐ligand charge transfer (MLCT) process would occur in the Pt‐doped g‐C 3 N 4 system, in which the doping metals coordinated in the N pots existed in the form of Pt(II).…”

Section: Strategies For Improving Thin‐layered Materials Photocatalytmentioning

confidence: 99%

Thin‐Layered Photocatalysts

Sun

Huang

Zhao

et al. 2020

Adv Funct Materials

132

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Semiconductor photocatalysis, a green and sustainable technology, is of great significance for solving environmental pollution and energy shortages. However, the common problems of inefficient light harvesting, rapid recombination of electron-hole pairs, and low surface reactive reaction sites for photocatalysts urgently need to be solved. In this regard, thin-layered photocatalysts are considered to be one of the most promising candidates for addressing these issues, due to their unique surface and electronic properties. In this review, the various strategies for constructing thin-layered photocatalysts are summarized, and emphasis is given to approaches for optimizing the photocatalytic performance of the thin-layered materials, which can be classified into surface engineering and junction construction. In addition, the photocatalytic applications of thin-layered materials, i.e., water splitting, CO 2 reduction, nitrogen fixation, and molecule oxygen activation, are summarized. Finally, based on current achievements in thin-layered photocatalysts, their future development and challenges are discussed.

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Boosted CO₂ photoreduction to methane via Co doping in bismuth vanadate atomic layers

Abstract: Boosted CO2 photoreduction and high CH4 selectivity on Co-doped BiVO4.

Cited by 42 publications

References 39 publications

Adsorption removal of methyl violet from aqueous solution by chromium phosphovanadate

Adsorption removal of methyl violet from aqueous solution by chromium phosphovanadate

Atomic‐Level Charge Separation Strategies in Semiconductor‐Based Photocatalysts

Thin‐Layered Photocatalysts

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Boosted CO2 photoreduction to methane via Co doping in bismuth vanadate atomic layers

Abstract: Boosted CO2 photoreduction and high CH4 selectivity on Co-doped BiVO4.

Cited by 42 publications

References 39 publications

Adsorption removal of methyl violet from aqueous solution by chromium phosphovanadate

Adsorption removal of methyl violet from aqueous solution by chromium phosphovanadate

Atomic‐Level Charge Separation Strategies in Semiconductor‐Based Photocatalysts

Thin‐Layered Photocatalysts

Contact Info

Product

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Boosted CO₂ photoreduction to methane via Co doping in bismuth vanadate atomic layers