Micellar interface modulation self-assembly strategy towards mesoporous bismuth oxychloride-based materials for boosting photocatalytic pharmaceuticals degradation

Li, Wei; Liu, Zhilin; Dong, Yangbo; Wang, Luoqi; Li, Zhi; Zhang, Ling; Qiao, Zhen‐An

doi:10.1016/j.cej.2022.137897

Cited by 7 publications

(4 citation statements)

References 58 publications

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“…The preponderant activated radicals in the degradation process by the 20% α-Bi 2 O 3 /BiOBr heterojunction were determined through radical capture experiments to reveal the photocatalytic mechanism. Hydroxy radicals ( • OH), holes (h + ), and superoxide radicals ( • O 2 – ) are quenched by applications of isopropanol (IPA), EDTA-2Na, and ascorbic acid (AA), which serve as capture agents Figure c,d clearly shows that the degradative productivity of the 20% α-Bi 2 O 3 /BiOBr nanocomposite would slightly reduce after the addition of IPA, with a degradation rate dropping from 97.7 to 87.4%.…”

Section: Resultsmentioning

confidence: 99%

“…Nonetheless, the rate of RhB degradation considerably drops to 13.0 and 10.6% when SO 4 ) are quenched by applications of isopropanol (IPA), EDTA-2Na, and ascorbic acid (AA), which serve as capture agents. 63 exhibited four distinct 1:1:1:1 characteristic signal peaks under the illumination, demonstrating that the composites are capable of reacting with dissolved oxygen molecules to produce • O 2 − after turning on the light. Otherwise, the signal of DMPO • OH is particularly faint in the presence of light, suggesting that the reaction system has trouble creating • OH.…”

Section: Effect Of External Conditions On Photocatalytic Degradation ...mentioning

confidence: 99%

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Heterojunctions Based on BiOBr Nanosheets Decorated on α-Bi₂O₃ for Photodegradation of Rhodamine B

Cheng,

Xiao,

Wang

et al. 2024

ACS Appl. Nano Mater.

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Photocatalysis is extensively implemented in organic pollutant degradation, and the critical point is to develop outstanding and stable photocatalysts. Herein, the synthesis of coral reef-like α-Bi 2 O 3 /BiOBr heterostructure photocatalysts involves the in situ growth of BiOBr nanosheets onto α-Bi 2 O 3 , with the latter derived through calcination utilizing a bismuthbased metal−organic framework (CAU-17) as the precursor. Under simulated sunlight, the 20% α-Bi 2 O 3 /BiOBr heterojunction degraded nearly 97.7% of RhB in 60 min, while pure α-Bi 2 O 3 and BiOBr nanosheets degraded only 7.8 and 65.3%, respectively. Furthermore, the 20% α-Bi 2 O 3 /BiOBr nanocomposite exhibited superior recycling stability, degrading 86.6% RhB after four cyclic experiments. This is attributed to the fact that the nanoscale α-Bi 2 O 3 material obtained by calcination can retain the exoteric diffusion channels of CAU-17, making α-Bi 2 O 3 /BiOBr heterojunctions have an enormous specific surface area, providing more adsorption sites and promoting their photocatalytic capacity. Free radical capture tests and electron paramagnetic resonance measurements indicated that h + and • O 2 − were the primary active substances during photodegradation. On the basis of that, a feasible photodegradation mechanism of type II α-Bi 2 O 3 /BiOBr heterojunctions was proposed. This study opens up the possibility of designing type II heterojunctions with MOFs as precursors for dye degradation.

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Section: Resultsmentioning

confidence: 99%

Section: Effect Of External Conditions On Photocatalytic Degradation ...mentioning

confidence: 99%

Heterojunctions Based on BiOBr Nanosheets Decorated on α-Bi₂O₃ for Photodegradation of Rhodamine B

Cheng,

Xiao,

Wang

et al. 2024

ACS Appl. Nano Mater.

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“…3c, compared with the other BiOCl catalysts, the Nyquist curve of PGE-BiOCl possessed the smallest radius, indicating its lower charge transfer resistance. 38 Generally, the intensity of photocurrent response can reflect the photocatalytic performance of photocatalysts. The photocurrent responses of BiOCl-based materials are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…37 Apart from introducing Ovs, adjusting the morphology of the photocatalyst to expose the dominant crystal plane is also an emerging method to promote the visible light response and conversion. 38 However, the effect of crystal plane change caused by morphology modification, the regulation of Ovs and the effect of rare earth Gd doping of the BiOCl semiconductor have been rarely reported for enhancing the solar light response. Therefore, our work mainly focused on exploring the effects of morphology modification, Ovs engineering and Gd doping on BiOCl through various characterization methods and evaluating its photocatalytic degradation ability for isothiazolinone.…”

Section: Introductionmentioning

confidence: 99%

Effective solar light-driven isothiazolinone degradation by morphology- and oxygen vacancy-modified Gd-doped BiOCl

Xu,

Guo,

Zhang

et al. 2024

New J. Chem.

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Chelated Ion‐Exchange Strategy toward BiOCl Mesoporous Single‐Crystalline Nanosheets for Boosting Photocatalytic Selective Aromatic Alcohols Oxidation

Mao

Liu

et al. 2023

Advanced Materials

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The photoresponse and photocatalytic efficiency of bismuth oxychloride (BiOCl) are greatly limited by rapid recombination of photogenerated carriers. The construction of porous single‐crystal BiOCl photocatalyst can effectively alleviate this issue and provide accessible active sites. Herein, a facile chelated ion‐exchange strategy is developed to synthesize BiOCl mesoporous single‐crystalline nanosheets (BiOCl MSCN) using acetic acid and ammonia solution respectively as chelating agent and ionization promoter. The strong chelation between acetate ions and Bi3+ ions introduces acetate ions into the precipitated product to exchange with Cl‐ ions, resulting in large lattice mismatch, strain release, and formation of void‐like mesopores. The prepared BiOCl MSCN photocatalyst exhibits excellent catalytic performance with 99% conversion and 98% selectivity for oxidation of benzyl alcohol to benzaldehyde and superior general adaptability for various aromatic alcohols. The theoretical calculations and characterizations confirm that the superior performance is mainly attributed to the abundant oxygen vacancies, plenty of accessible adsorption/active sites and fast charge transport path without grain boundaries.

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Micellar interface modulation self-assembly strategy towards mesoporous bismuth oxychloride-based materials for boosting photocatalytic pharmaceuticals degradation

Cited by 7 publications

References 58 publications

Heterojunctions Based on BiOBr Nanosheets Decorated on α-Bi₂O₃ for Photodegradation of Rhodamine B

Heterojunctions Based on BiOBr Nanosheets Decorated on α-Bi₂O₃ for Photodegradation of Rhodamine B

Effective solar light-driven isothiazolinone degradation by morphology- and oxygen vacancy-modified Gd-doped BiOCl

Chelated Ion‐Exchange Strategy toward BiOCl Mesoporous Single‐Crystalline Nanosheets for Boosting Photocatalytic Selective Aromatic Alcohols Oxidation

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Micellar interface modulation self-assembly strategy towards mesoporous bismuth oxychloride-based materials for boosting photocatalytic pharmaceuticals degradation

Cited by 7 publications

References 58 publications

Heterojunctions Based on BiOBr Nanosheets Decorated on α-Bi2O3 for Photodegradation of Rhodamine B

Heterojunctions Based on BiOBr Nanosheets Decorated on α-Bi2O3 for Photodegradation of Rhodamine B

Effective solar light-driven isothiazolinone degradation by morphology- and oxygen vacancy-modified Gd-doped BiOCl

Chelated Ion‐Exchange Strategy toward BiOCl Mesoporous Single‐Crystalline Nanosheets for Boosting Photocatalytic Selective Aromatic Alcohols Oxidation

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Product

Resources

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Heterojunctions Based on BiOBr Nanosheets Decorated on α-Bi₂O₃ for Photodegradation of Rhodamine B

Heterojunctions Based on BiOBr Nanosheets Decorated on α-Bi₂O₃ for Photodegradation of Rhodamine B