Preparation of BiOBr-Bi heterojunction composites with enhanced photocatalytic properties on BiOBr surface by in-situ reduction

Gao, Zhanyao; Yao, Binghua; Yang, Fan; Xu, Tiantian; He, Yangqing

doi:10.1016/j.mssp.2019.104882

Cited by 23 publications

(9 citation statements)

References 47 publications

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“…After each interval of 20 min, retrieval of approximately 2.5 mL of suspension and then the absorption of the liquid supernatant (the maximum absorption wavelength was about 554 nm) were carried out. The degradation Rh B solution efficiency was calculated by the following formula , …”

Section: Methodsmentioning

confidence: 99%

Superhydrophobic Self-Supporting BiOBr Aerogel for Wastewater Purification

et al. 2020

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This research was focused on the raw material level construction of bismuth oxybromide (BiOBr) catalysis-loaded 3D crosslinked network polyurethane (PU) foam via the in situ polymerization method. After modification of superhydrophobic polydivinylbenzene nanoparticles, the PU foam possessed excellent superhydrophobic stability. The larger selective absorption oil phase capacity depended on its macroporous structure, and the existence of catalyst BiOBr (the band gap energy was about 2.57 eV) among the PU foam played a crucial role in degrading water-soluble contaminants under visible light irradiation. In this article, the photocatalytic experiment results verify that it has remarkable recycle degradation ability (the degradation efficiency can reach ∼97%) and the capture experiments indicate that the uppermost active species is h + .

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Section: Methodsmentioning

confidence: 99%

Superhydrophobic Self-Supporting BiOBr Aerogel for Wastewater Purification

et al. 2020

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“…[15] Until now, many strategies have been devoted to successfully preparing Bi/BiOX photocatalysts, in which metallic Bi is usually in situ generated from BiOX host with the assistance of a chemical reduction agent or exclusive electrochemical technology. [17][18][19][20] Although the synergistic effect of Bi/BiOX heterojunction improves the charge transfer efficiency and the optical absorption property to some extent, the construction of well-defined Bi/BiOX nanostructures with the compact and ordered interface is still challenging from the perspective of material synthesis and catalytic application.…”

Section: Doi: 101002/admi202200260mentioning

confidence: 99%

BiOX/Bi/BiOX (X = Cl, Br) Double‐Side Nanosheet Arrays: Synthesis, Structures, and Photo(electro)catalytic Applications

Wang

Zhang

et al. 2022

Adv Materials Inter

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Array‐structured photocatalysts, featuring unique transport properties of charge carriers and special texture structures, have captured widespread interest in photocatalytic and/or photoelectrocatalytic applications. However, the fabrication of arrays usually suffers from complicated synthetic routes and the indispensable use of substrates. Herein, a novel BiOX/Bi/BiOX (X = Cl, Br) double‐side nanosheet array catalyst, with vertically aligned BiOX nanosheets symmetrically grown on the two sides of horizontal Bi nanoplates, is first constructed by a facile solution‐phase solvothermal route in the absence of any substrates. Both l‐cysteine and ethylene glycol are found to play critical roles in the formation of Bi nanoplates and the growth of BiOX nanosheets. Thanks to the synergism of double‐side metal‐semiconductor array, BiOX/Bi/BiOX presents significantly boosted performance for photocatalytic selective oxidation of benzyl alcohol to benzaldehyde, far surpassing Bi/BiOX and pristine BiOX. Additionally, BiOX/Bi/BiOX also exhibits superior photoelectrocatalytic performance with excellent hydrogen and oxygen evolution reaction activity. The electrochemical analysis and photoluminescence results reveal that the middle Bi nanoplate can function as a fast transport channel for photogenerated electrons, significantly accelerating the separation of photogenerated carriers. This work provides a general substrate‐free strategy to construct array catalysts with double‐side structure and reveals the outstanding advantages toward improved photocatalysis.

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“…Functional groups of BiOI/Fe 2 O 3 /BiOBr were analyzed by infrared absorption spectroscopy, as shown in Figure 4; 478 and 767 cm À1 are the characteristic absorption peaks of Bi-O bond in BiOI. [32,33] The absorption peak at 1407 cm À1 corresponds to the stretching vibration of Bi-Br bond in BiOBr [34] ; 555 cm À1 corresponds to the characteristic absorption peak of Fe-O bond in Fe 2 O 3 . [35]…”

Section: Ft-ir Analysismentioning

confidence: 99%

Preparation of Z‐scheme spherical BiOI/Fe₂O₃/BiOBr for water pollution treatment

Jing

Gao

Wang

et al. 2022

Applied Organom Chemis

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Tetracycline drugs play a very important role in medical production and animal husbandry, but their residues are difficult to be naturally degraded in water environment, which causes a certain threat to human health. In this paper, the BiOI/Fe 2 O 3 /BiOBr composite photocatalytic material was successfully prepared to degrade tetracycline. The morphology and structure of the material were characterized by XRD, SEM, TEM, EDX, FT-IR, UV-vis DRS, PL, EIS, photocurrent response, BET, and TOC, and the effect of the material on the degradation of tetracycline under simulated sunlight was investigated. The results showed that when the mass of BiOI/Fe 2 O 3 and BiOBr was 1:1, reacted at 160 C for 16 h, BiOI/Fe 2 O 3 /BiOBr has the best degradation effect on tetracycline. The degradation rate of tetracycline can reach 85% in 180 min, and its kinetic rate constant is 2.16 and 1.8 times that of single BiOI and BiOI/ Fe 2 O 3 , respectively. Based on the capture experiment of active substances, a Z-scheme catalytic mechanism is proposed to analyze the degradation process of tetracycline, and BiOI/Fe 2 O 3 /BiOBr also showed a certain photocatalytic activity to other antibiotics and organic dyes in water.

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Preparation of BiOBr-Bi heterojunction composites with enhanced photocatalytic properties on BiOBr surface by in-situ reduction

Cited by 23 publications

References 47 publications

Superhydrophobic Self-Supporting BiOBr Aerogel for Wastewater Purification

Superhydrophobic Self-Supporting BiOBr Aerogel for Wastewater Purification

BiOX/Bi/BiOX (X = Cl, Br) Double‐Side Nanosheet Arrays: Synthesis, Structures, and Photo(electro)catalytic Applications

Preparation of Z‐scheme spherical BiOI/Fe₂O₃/BiOBr for water pollution treatment

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Preparation of BiOBr-Bi heterojunction composites with enhanced photocatalytic properties on BiOBr surface by in-situ reduction

Cited by 23 publications

References 47 publications

Superhydrophobic Self-Supporting BiOBr Aerogel for Wastewater Purification

Superhydrophobic Self-Supporting BiOBr Aerogel for Wastewater Purification

BiOX/Bi/BiOX (X = Cl, Br) Double‐Side Nanosheet Arrays: Synthesis, Structures, and Photo(electro)catalytic Applications

Preparation of Z‐scheme spherical BiOI/Fe2O3/BiOBr for water pollution treatment

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Preparation of Z‐scheme spherical BiOI/Fe₂O₃/BiOBr for water pollution treatment