Template-free synthesis of nanosliced BiOBr hollow microspheres with high surface area and efficient photocatalytic activity

Wang, Haitao; Shi, Meng‐Shan; Heng, Y.; Chang, Na; Zhang, Hao; Liu, Ya‐Pan; Lu, Mei‐Chan; Ao, De; Chu, Dewei

doi:10.1016/j.matlet.2018.03.179

Cited by 45 publications

(7 citation statements)

References 13 publications

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“…After centrifugation, the residual concentration of TC was monitored by the UV-vis spectrophotometer (METASH UV-8000A, SHJH (Group) Company, Shanghai, China). BiOBr/UCN/BPQDs composites showed the best photodegradation efficiency, with a degradation efficiency of up to 92% within 3 h (Figure 8) [15,20,24,25,26]. The catalytic performance of BiOBr/UCN composites was slightly lower, reaching 84%, whereas that of pure BiOBr reached 71.6%.…”

Section: Resultsmentioning

confidence: 99%

“…Secondly, we coupled the UCN with an inorganic composite photocatalyst BiOBr. BiOBr has a highly suitable photocatalytic redox bandgap (2.75 eV) under visible light and has been widely used in the photocatalytic degradation of dyes, antibiotics, and other substances [19,20,21,22,23]. UCNs doped with BiOBr through a simple stirring and hydrothermal procedure to form a heterojunction to promote the separation of e − –h + pairs, have shown an enhanced catalytic degradation efficiency of UCN under visible light [24,25].…”

Section: Introductionmentioning

confidence: 99%

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The Ternary Heterostructures of BiOBr/Ultrathin g-C3N4/Black Phosphorous Quantum Dot Composites for Photodegradation of Tetracycline

et al. 2018

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Herein, we synthesized BiOBr/ultrathin g-C3N4/ternary heterostructures modified with black phosphorous quantum dots using a simple water bath heating and sonication method. The ternary heterostructure was then used for the photocatalytic degradation of tetracycline in visible light, with an efficiency as high as 92% after 3 h of irradiation. Thus, the photodegradation efficiency is greatly improved compared to that of ultrathin g-C3N4, BiOBr, and black phosphorous quantum dots alone. The synthesized ternary heterostructure improves the charge separation efficiency, thus increasing the photodegradation efficiency. This work provides a new and efficient method for the degradation of antibiotics in the environment.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Ternary Heterostructures of BiOBr/Ultrathin g-C3N4/Black Phosphorous Quantum Dot Composites for Photodegradation of Tetracycline

et al. 2018

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“…As shown in Figure 5b, the band gap energy of DUPG is 2.65 eV, and the band gap energy of BiOBr is 2.73 eV, both of which are within the numerical ranges reported previously in Refs. [49][50][51] The band gap energy of the DUPG/BiOBr composites is around 2.6 eV, which is smaller than DUPG and BiOBr monomers. It means that the photogenerated electron-hole pairs of the DUPG/BiOBr composites have a longer lifetime, resulting in a better photocatalytic effect.…”

Section: Optical Propertiesmentioning

confidence: 99%

In Situ Construction of Porous g‐C₃N₄ Isotype Heterojunction/BiOBr Nanosheets Ternary Composite Catalyst for Highly Efficient Visible‐Light Photocatalytic Activity

et al. 2021

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In this study, the composite catalysts with the heterojunction between DUPG and BiOBr were used to degrade methyl orange (MO), and a g-C 3 N 4 -based ternary composite catalyst was developed. In our previous work, we prepared a D-C 3 N 4 /U-C 3 N 4 isotype heterojunction with ordered mesoporous (DUPG) by co-mixed calcination and hard template method. On this basis, we prepared DUPG/BiOBr nanoparticle uniformly distributed on DUPG nanosheets by coprecipitation self-assembly method. The hybrids form a tightly coupled heterojunction that enhances the photoactivity and photostability of the DUPG/ BiOBr composites. The results show that this tight coupling is beneficial, which facilitates the charge transfer between DUPG and BiOBr, thus promoting the effective separation of photogenerated electron hole pairs. Under visible light irradiation, the methyl orange conversion of the sample has higher photocatalytic reduction activity than BiOBr and DUPG, and its excellent photocatalytic activity is improved by light-harvesting ability, increased specific surface area, active species and target pollution.

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“…An important trend in the development of modern materials science is the assembly and design of target materials, which not only meet the regulatory needs of the microstructure, but also meet the needs of functionalization, such as the preparation of hollow microspheres. The hollow sphere structure will make the material have excellent performance, such as big specific surface area, high light transmittance, and good optical properties . Electrostatic adsorption self‐assembly technology is a process based on the oppositely charged electrostatic adsorption force to spontaneously form a thermodynamically stable, structurally stable, and performance‐specific aggregate.…”

Section: Introductionmentioning

confidence: 99%

“…The hollow sphere structure will make the material have excellent performance, such as big specific surface area, high light transmittance, and good optical properties. [20][21][22][23][24] Electrostatic adsorption self-assembly technology is a process based on the oppositely charged electrostatic adsorption force to spontaneously form a thermodynamically stable, structurally stable, and performance-specific aggregate. This technology is simple, green, and nonpolluting, providing a powerful theoretical support for studying the formation mechanism of special morphology catalysts.…”

Section: Introductionmentioning

confidence: 99%

Structure regulation and photocatalytic activity enhancement of Bi₂WO₆by “double‐effect modification” mode

et al. 2019

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Summary In this paper, the Cl‐doped hollow microspherical Bi2WO6 nano‐photocatalyst was self‐assembly synthesized creatively by one‐step solvothermal method using the surface charge regulation strategy for electrostatic adsorption effect of anion in KCl and cation in polyvinylpyrrolidone (PVP). The crystal structure, morphology, element distribution, chemical state, and optical characteristic were, respectively, characterized. The reasons for improving the photocatalytic activity were investigated by degrading tetracycline hydrochloride (TCH). Combined with characterization analysis and the density functional theory (DFT theory), the “double‐effect modification” mode under the surface charge control strategy can not only successfully dope the Cl‐ to achieve functionalization of the product, but also achieve effective control of the product morphology through electrostatic self‐assembly process. The electron hole pair recombination was further inhibited, and the photocatalytic activity was improved. The proposed mode provides a simpler, more efficient and widely applicable method for the modification of Bi2WO6 to enhance its photocatalytic activity.

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Template-free synthesis of nanosliced BiOBr hollow microspheres with high surface area and efficient photocatalytic activity

Cited by 45 publications

References 13 publications

The Ternary Heterostructures of BiOBr/Ultrathin g-C3N4/Black Phosphorous Quantum Dot Composites for Photodegradation of Tetracycline

The Ternary Heterostructures of BiOBr/Ultrathin g-C3N4/Black Phosphorous Quantum Dot Composites for Photodegradation of Tetracycline

In Situ Construction of Porous g‐C₃N₄ Isotype Heterojunction/BiOBr Nanosheets Ternary Composite Catalyst for Highly Efficient Visible‐Light Photocatalytic Activity

Structure regulation and photocatalytic activity enhancement of Bi₂WO₆by “double‐effect modification” mode

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Template-free synthesis of nanosliced BiOBr hollow microspheres with high surface area and efficient photocatalytic activity

Cited by 45 publications

References 13 publications

The Ternary Heterostructures of BiOBr/Ultrathin g-C3N4/Black Phosphorous Quantum Dot Composites for Photodegradation of Tetracycline

The Ternary Heterostructures of BiOBr/Ultrathin g-C3N4/Black Phosphorous Quantum Dot Composites for Photodegradation of Tetracycline

In Situ Construction of Porous g‐C3N4 Isotype Heterojunction/BiOBr Nanosheets Ternary Composite Catalyst for Highly Efficient Visible‐Light Photocatalytic Activity

Structure regulation and photocatalytic activity enhancement of Bi2WO6by “double‐effect modification” mode

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Product

Resources

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In Situ Construction of Porous g‐C₃N₄ Isotype Heterojunction/BiOBr Nanosheets Ternary Composite Catalyst for Highly Efficient Visible‐Light Photocatalytic Activity

Structure regulation and photocatalytic activity enhancement of Bi₂WO₆by “double‐effect modification” mode