Construction of a flower-like S-scheme Bi<sub>2</sub>WO<sub>6</sub>/BiOCl nano-heterojunction with enhanced visible-light photocatalytic properties

Zheng, Yuanyuan; Sun, Yangang

doi:10.1039/d2nj04521d

Cited by 9 publications

(4 citation statements)

References 67 publications

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“…The heterojunction catalyst, in which CdWO 4 serves as an electron acceptor transferred from Bi 2 WO 6 , appears to impede the direct recombination of electrons. 37,38…”

Section: Resultsmentioning

confidence: 99%

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Preparation and photocatalytic properties of a CdWO₄/Bi₂WO₆ binary heterojunction

Luo,

Sun

2024

CrystEngComm

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“…The heterojunction catalyst, in which CdWO 4 serves as an electron acceptor transferred from Bi 2 WO 6 , appears to impede the direct recombination of electrons. 37,38…”

Section: Resultsmentioning

confidence: 99%

“…The heterojunction catalyst, in which CdWO 4 serves as an electron acceptor transferred from Bi 2 WO 6 , appears to impede the direct recombination of electrons. 37,38 The surface area and porous structures of Bi 2 WO 6 and CdWO 4 /Bi 2 WO 6 -3 were analyzed by N 2 adsorptiondesorption technology. From the data in Fig.…”

Section: Crystengcomm Papermentioning

confidence: 99%

Preparation and photocatalytic properties of a CdWO₄/Bi₂WO₆ binary heterojunction

Luo,

Sun

2024

CrystEngComm

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“…Stepwise (S-scheme) heterojunctions have been popular in recent studies for constructing heterojunction systems for photocatalysts. − The S-scheme heterojunction can be visualized macroscopically as a transfer route of e – from lower to higher positions, and it is similar to a Z-scheme heterojunction but retains a stronger redox potential. In general, S-scheme heterojunctions consist of two types of semiconductors: reduced semiconductors (A) and oxidized semiconductors (B).…”

Section: Modification Of 2d Bi-based Photocatalystsmentioning

confidence: 99%

2D Bismuth-Based Nanomaterials for Photocatalytic Nitrogen Oxide Removal: Progress and Prospects

Lu,

Wang,

et al. 2024

ACS Sustainable Chem. Eng.

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Nitrogen oxides (NO x , ∼95% NO) are significant atmospheric pollutants that contribute to environmental issues like acid rain and ozone layer depletion. The traditional remediation methods of physical/chemical adsorption and postcombustion reduction techniques fall short in effectively removing gaseous NO at parts per billion (ppb) levels. Consequently, photocatalysis for NO elimination has garnered intensive attention for its cost-effectiveness, efficiency, and ecofriendly attributes. Within the emerging nanomaterials for photocatalytic NO removal, 2D bismuth-based (Bi-based) photocatalysts are pivotal due to their distinctive electronic and structural characteristics. Nonetheless, a comprehensive review of the mechanisms and efficacy of NO removal via 2D Bi-based photocatalysts is still lacking. This review endeavors to fill that gap, elucidating the possible reaction pathways employed by 2D Bi-based nanomaterials for photocatalytic NO oxidation or reduction. Furthermore, it extends to highlight the main factors influencing their photocatalytic efficiencies and summarize three primary modification strategies for enhancement of the photocatalytic activities of 2D Bi-based nanomaterials, encompassing defect engineering, elemental doping, and the construction of heterojunctions. Finally, this review culminates with a forward-looking perspective in developing high-performance 2D Bi-based photocatalysts for NO removal, which underscores existing challenges and sparks new ideas for future work.

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“…BWO-2 exhibits the greatest intensity of photocurrent (as shown in Figure 12), while BWO-1.5 and BWO-3 demonstrate significantly lower photocurrent intensities compared to BWO-2. The I-t test curve reveals that the strong photocatalytic activity of sample BWO-2 with moderate alkali is due to the sensitivity of photogenerated electrons to light radiation [88], which leads to the high efficiency of carrier separation in the sample [89]. Photogenerated electrons are combined with the CO 2 on the surface of the photocatalysts, thus improving the activity of the photocatalytic CO 2 reduction.…”

Section: Photocatalytic Performances For Co 2 Reductionmentioning

confidence: 99%

The Highly Enhanced Efficiency of the Photocatalytic Reduction of CO2 over Bi2WO6 Nanosheets by NaOH Microregulation

Song,

Sun,

Zhang

et al. 2023

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The photoreduction of CO2 to other products containing carbon through simulated photosynthesis is a promising area of research. However, given the complexity of the CO2 photocatalytic reduction reaction, it is crucial to adjust the structure of the photocatalysts. The focus of this study was on creating NaOH-modified Bi2WO6 nanosheet photocatalysts via a one-step hydrothermal route and using them to convert CO2 into CO through photocatalytic reduction under the condition of not using an electron sacrifice agent. The results of characterizations and activity data showed that adding an appropriate amount of NaOH significantly improved the photoreduction activity of CO2, as seen in the BWO-2 catalyst. The efficiency of photocatalysts could be improved by tuning the band structure through the addition of an appropriate amount of alkali. This adjustment improves the separation of photogenerated carriers and controls the concentration of oxygen vacancy to reduce recombination. As a result, the photocurrent activity is highly enhanced, leading to better reduction performance compared to unmodified photocatalysts. In experiments, the CO yield of the modified photocatalyst BWO-2 remained above 90 μmol/g after four trials, indicating its effectiveness in reducing CO2. This study offers insights into the regulation of band structure in bismuth-based photocatalysts for efficient CO2 reduction.

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Construction of a flower-like S-scheme Bi₂WO₆/BiOCl nano-heterojunction with enhanced visible-light photocatalytic properties

Abstract: A novel flower-like S-scheme Bi2WO6/BiOCl nano-heterojunction is successfully fabricated by a simple one-pot hydrothermal method. With the construction of the flower-like structure and S-scheme heterojunction, Bi2WO6/BiOCl-3 nano-heterojunction displays an excellent...

Cited by 9 publications

References 67 publications

Preparation and photocatalytic properties of a CdWO₄/Bi₂WO₆ binary heterojunction

Preparation and photocatalytic properties of a CdWO₄/Bi₂WO₆ binary heterojunction

2D Bismuth-Based Nanomaterials for Photocatalytic Nitrogen Oxide Removal: Progress and Prospects

The Highly Enhanced Efficiency of the Photocatalytic Reduction of CO2 over Bi2WO6 Nanosheets by NaOH Microregulation

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Construction of a flower-like S-scheme Bi2WO6/BiOCl nano-heterojunction with enhanced visible-light photocatalytic properties

Abstract: A novel flower-like S-scheme Bi2WO6/BiOCl nano-heterojunction is successfully fabricated by a simple one-pot hydrothermal method. With the construction of the flower-like structure and S-scheme heterojunction, Bi2WO6/BiOCl-3 nano-heterojunction displays an excellent...

Cited by 9 publications

References 67 publications

Preparation and photocatalytic properties of a CdWO4/Bi2WO6 binary heterojunction

Preparation and photocatalytic properties of a CdWO4/Bi2WO6 binary heterojunction

2D Bismuth-Based Nanomaterials for Photocatalytic Nitrogen Oxide Removal: Progress and Prospects

The Highly Enhanced Efficiency of the Photocatalytic Reduction of CO2 over Bi2WO6 Nanosheets by NaOH Microregulation

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Construction of a flower-like S-scheme Bi₂WO₆/BiOCl nano-heterojunction with enhanced visible-light photocatalytic properties

Preparation and photocatalytic properties of a CdWO₄/Bi₂WO₆ binary heterojunction

Preparation and photocatalytic properties of a CdWO₄/Bi₂WO₆ binary heterojunction