Construction of oxygen vacancy on Bi12O17Cl2 nanosheets by heat-treatment in H2O vapor for photocatalytic NO oxidation

Yang, Yi; Zeng, Yi; Jin, Tongxin; Zhang, Xiaohu; Teng, Huai‐Long; Wang, Shengyao; Chen, Hao

doi:10.1016/j.jmst.2022.02.018

Cited by 16 publications

(4 citation statements)

References 32 publications

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“…The two intensive peaks at 158.4 and 163.73 eV in the Bi 4f spectrum (Figure b) were attributed to Bi 4f 7/2 and Bi 4f 5/2 . The O 1s peak was resolved into three peaks corresponding to Bi–O (529.1 eV) and surface −OH species (531.24 eV and 533.04 eV) (Figure c) . In addition, two characteristic peaks at 197.45 and 199.10 eV corresponding to Cl 2p 3/2 and Cl 2p 1/2 could be observed in Figure d …”

Section: Resultsmentioning

confidence: 89%

“…31 The O 1s peak was resolved into three peaks corresponding to Bi−O (529.1 eV) and surface −OH species (531.24 eV and 533.04 eV) (Figure 2c). 32 In addition, two characteristic peaks at 197.45 and 199.10 eV corresponding to Cl 2p 3/2 and Cl 2p 1/2 could be observed in Figure 2d. 33 The morphology and microstructural characterizations of materials were investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM).…”

Section: Resultsmentioning

confidence: 91%

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MOF-Derived Bi₁₂O₁₇Cl₂ Nanoflakes for the Photocatalytic Degradation of Bisphenol A and Tetracycline Hydrochloride under Visible Light

Wang,

Xue,

Liao

et al. 2024

ACS Appl. Nano Mater.

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Photocatalytic degradation of pollutants is an attractive method to handle environmental pollution issues. Here, Bi 12 O 17 Cl 2 photocatalysts were synthesized facilely by hydrolyzed bismuth-based metal organic framework (Bi-BTC) precursors, and their thickness was adjusted by controlling the hydrolysis time. Under visible light irradiation, MOF-derived Bi 12 O 17 Cl 2 nanoflakes fabricated by this strategy exhibited higher photocatalytic activity in the degradation of bisphenol A (BPA) and tetracycline hydrochloride (TCH) than the conventional Bi 12 O 17 Cl 2 materials prepared by hydrothermal and chemical precipitation, which could reach up to 94.3 and 92.2% within 60 min under optimal conditions. The inhibition experiments and electron spin resonance (ESR) confirmed that superoxide radicals (• O 2 − ) were the main active species for photodegradation activity. Furthermore, the possible degradation pathways of BPA and TCH were proposed according to the detected intermediates by LC-MS. At the same time, this method has been extended to synthesize Bi 5 O 7 I and Bi 12 O 17 Br 2 materials, providing a strategy for the fabrication of bismuth-rich bismuth oxyhalide materials in environment treatment.

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Section: Resultsmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 91%

MOF-Derived Bi₁₂O₁₇Cl₂ Nanoflakes for the Photocatalytic Degradation of Bisphenol A and Tetracycline Hydrochloride under Visible Light

Wang,

Xue,

Liao

et al. 2024

ACS Appl. Nano Mater.

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“…Briefly, a strong PL emission intensity is detected for BMO, demonstrating its strong charge recombination behavior after excitation. However, the corresponding PL emission intensity decreases sharply for BMO-OH, indicating that the charge recombination behavior is restrained effectively by introduced OVs. ,− That is, BMO-OH possesses a higher photogenerated charge separation efficiency than BMO. This viewpoint can be further illustrated by the light on–off induced photocurrent–time behaviors shown in Figure c.…”

Section: Resultsmentioning

confidence: 99%

Constructing Oxygen Vacancies on Bi₂MoO₆ Nanosheets by Aqueous Ammonia Etching with Enhanced Photocatalytic NO Oxidation Performance

et al. 2022

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Photocatalytic technology is deemed as an ideal strategy to deal with nitrogen oxides. Constructing oxygen vacancies (OVs) on semiconductors can greatly promote photogenerated charge separation efficiency, molecular activation, and photocatalytic activity. However, a novel method for OVs introduction under moderate conditions is still lacking. In the present work, a {001} facet exposed Bi 2 MoO 6 (BMO) nanosheet is treated in aqueous ammonia under mild conditions. In this procedure, OVs are successfully introduced into BMO via etching of the {MoO 4 } 2− layer by aqueous ammonia, and a OVs-rich BMO-OH catalyst is prepared. Photocatalytic performance tests convey that a NO removal ratio of 47% is obtained on the BMO-OH catalyst, which is about 2.2 times higher than that of pristine BMO material. The enhanced photoactivity is attributed to high reactant adsorption and ROS generation properties of BMO-OH caused by the introduced OVs. These findings provide new insights into OVs construction and photocatalytic technology.

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“…To enhance the photocatalytic degradation ability of Bi 12 O 17 Cl 2, various strategies have been employed, including heterojunction fabrication [ 7 ], ion doping [ 8 ], selective synthesis routes [ 9 ], plasmon resonance effect [ 10 ], solid solution [ 11 ] and photosensitization effect [ 12 ]. The photosensitization strategy involves applying a photosensitizer such a porphyrin, to photocatalyst of interest to increase visible light utilization in the resulting composite heterostructure [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Self-assembled micro and nano rod-shaped porphyrin@Bi12O17Cl2 composite as an efficient photocatalyst for degradation of organic contaminants

Ogbeifun,

Tichapondwa,

Chirwa

2023

Discover Nano

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Bi12O17Cl2 is a potential photocatalyst in practical applications due to its excellent photostability, visible light activity, and competitive bandgap energy. However, the fast recombination of photogenerated charge carriers makes it impractical for pollution mitigation. Recently, aggregated porphyrins have emerged as photosensitizers in light-dependent applications such as photocatalysis. Although Bi12O17Cl2 and porphyrin can function as separate photocatalysts, their photocatalytic properties in terms of visible light adsorption, charge separation and transport, can be improved when they are combined to form heterostructure. In this study, rod-shaped aggregated 5,10,15, 20-Tetrakis (4-carboxyphenyl) porphyrin was synthesized by CTAB-assisted, self-assembly strategy and Bi12O17Cl2 by a facile microwave method. The porphyrin and Bi12O17Cl2 were combined to generate a series of x%Porphyrin@Bi12O17Cl2 having 0.02% wt., 0.1% wt., 0.4% wt., 1% wt. and 10% wt. as compositions of porphyrin. The materials’ photocatalytic degradation efficiency was tested on Rhodamine B dye as a representative pollutant. The best and worst performances were reported for 1%Porphyrin@Bi12O17Cl2 and 10%Porphyrin@Bi12O17Cl2, respectively, which are 3.1 and 0.5 times increases in efficiency compared to pure Bi12O17Cl2. From the radical trapping experiment, electrons and superoxide were the dominant reactive species in the degradation process. The enhanced photocatalytic capability of the materials was attributed to the photosensitizing property of porphyrin and the heterojunction formation, which promotes the separation of photogenerated charge carriers. A plausible step-scheme (S-scheme) was proposed for the photocatalytic degradation mechanism. The S-scheme provided the high redox potential of the photogenerated charge carriers. The findings herein offer a new option for improving the photocatalytic performance of Bi12O17Cl2 for environmental applications through the photosensitization strategy. Graphical abstract

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Construction of oxygen vacancy on Bi12O17Cl2 nanosheets by heat-treatment in H2O vapor for photocatalytic NO oxidation

Cited by 16 publications

References 32 publications

MOF-Derived Bi₁₂O₁₇Cl₂ Nanoflakes for the Photocatalytic Degradation of Bisphenol A and Tetracycline Hydrochloride under Visible Light

MOF-Derived Bi₁₂O₁₇Cl₂ Nanoflakes for the Photocatalytic Degradation of Bisphenol A and Tetracycline Hydrochloride under Visible Light

Constructing Oxygen Vacancies on Bi₂MoO₆ Nanosheets by Aqueous Ammonia Etching with Enhanced Photocatalytic NO Oxidation Performance

Self-assembled micro and nano rod-shaped porphyrin@Bi12O17Cl2 composite as an efficient photocatalyst for degradation of organic contaminants

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Construction of oxygen vacancy on Bi12O17Cl2 nanosheets by heat-treatment in H2O vapor for photocatalytic NO oxidation

Cited by 16 publications

References 32 publications

MOF-Derived Bi12O17Cl2 Nanoflakes for the Photocatalytic Degradation of Bisphenol A and Tetracycline Hydrochloride under Visible Light

MOF-Derived Bi12O17Cl2 Nanoflakes for the Photocatalytic Degradation of Bisphenol A and Tetracycline Hydrochloride under Visible Light

Constructing Oxygen Vacancies on Bi2MoO6 Nanosheets by Aqueous Ammonia Etching with Enhanced Photocatalytic NO Oxidation Performance

Self-assembled micro and nano rod-shaped porphyrin@Bi12O17Cl2 composite as an efficient photocatalyst for degradation of organic contaminants

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Product

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MOF-Derived Bi₁₂O₁₇Cl₂ Nanoflakes for the Photocatalytic Degradation of Bisphenol A and Tetracycline Hydrochloride under Visible Light

MOF-Derived Bi₁₂O₁₇Cl₂ Nanoflakes for the Photocatalytic Degradation of Bisphenol A and Tetracycline Hydrochloride under Visible Light

Constructing Oxygen Vacancies on Bi₂MoO₆ Nanosheets by Aqueous Ammonia Etching with Enhanced Photocatalytic NO Oxidation Performance