In-situ construction of high-efficiency phase-transition induced m-Bi2O4/Bi4O7 surface heterojunction photocatalysts and mechanism investigation

Cheng, Da Long; Teng, Mengqi; Chen, Yufeng; Wang, Geming; Wang, Shenggao; Yang, Jingjing

doi:10.1016/j.jpcs.2021.109947

Cited by 18 publications

(7 citation statements)

References 48 publications

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“…The results showed that TiO 2 with a (110)/(001) junction had a good photocatalytic performance. In recent years, it has been reported that the surface junctions separate the electrons and holes efficiently and improve the photocatalytic activity. − …”

Section: Introductionmentioning

confidence: 99%

BiOCl Nanorings with Co-Exposed (110)/(001) Facets for Photocatalytic Degradation of Organic Dyes

Peng

Zhao

Liu

2022

ACS Appl. Nano Mater.

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A BiOCl nanoring with co-exposed (110)/(001) facets is presented, which is prepared by selectively etching (001) facets of BiOCl nanosheets based on a selective etching mechanism. The BiOCl nanorings display a high photocatalytic performance toward organic dyes including butyl rhodamine B (RhB) and methyl orange (MO). The results show that 40 mg of BiOCl nanorings can degrade 40 mL of RhB (10 mg L −1 ) in 4 min. Besides, 40 mL of 30 mg L −1 RhB can be completely degraded within 14 min. The reaction rate constant of 1.659 min −1 for BiOCl nanorings is seven times higher than that of the BiOCl nanosheets. In addition, 40 mg of BiOCl nanorings can degrade 97% of 40 mL (10 mg L −1 ) MO in 2 min. The good photocatalytic performance is ascribed to the formation of type-II junctions between ( 001) and ( 110) facets. It is expected that the specific nanoring structure presented here would find broad applications for developing many other emerging high-performance photocatalysts.

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Section: Introductionmentioning

confidence: 99%

BiOCl Nanorings with Co-Exposed (110)/(001) Facets for Photocatalytic Degradation of Organic Dyes

Peng

Zhao

Liu

2022

ACS Appl. Nano Mater.

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“…TiO 2 , the first and most studied photocatalyst, has been regarded as t photocatalyst with most potential. However, TiO 2 can only be excited under UV light irradiation to exhibit high photocatalytic activity for degradation of pollutants 8‐10 . Because UV light accounts for only 4% of the solar spectrum, low utilization of solar energy limits the practical application of TiO 2 11,12 .…”

Section: Introductionmentioning

confidence: 99%

“…However, TiO 2 can only be excited under UV light irradiation to exhibit high photocatalytic activity for degradation of pollutants. [8][9][10] Because UV light accounts for only 4% of the solar spectrum, low utilization of solar energy limits the practical application of TiO 2 . 11,12 Therefore, development of visible-light responsive photocatalysts, which can utilize solar energy more effectively, has become a research hotspot in the field of photocatalysis.…”

Section: Introductionmentioning

confidence: 99%

Bi₂O₄ decorated with SnO₂ nanoparticles as direct Z‐scheme heterojunction for enhanced degradation of tetracycline under visible light irradiation

Zhao

Chen

Hao

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND Bismuth tetraoxide (Bi2O4) has attracted increasing interest as a novel visible‐light‐driven photocatalyst. It suffers from some drawbacks, such as quick recombination of photogenerated electrons and holes, small specific surface area and few active sites due to submicron rod structure. RESULTS A novel and efficient binary heterojunction photocatalyst, in which zero‐dimensional (0D) SnO2 nanoparticles was anchored on the surface of one‐dimensional (1D) Bi2O4 micrometer rods, was successfully synthesized. The as‐prepared samples were characterized by X‐ray diffraction (XRD), scanning electron microscopy, transmission electron microscope, Fourier transform infrared spectroscopy and X‐ray photoelectron spectroscopy. The photocatalytic activity of the synthesized photocatalysts was evaluated by photodegradation of tetracycline (TC) under visible‐light irradiation. The prepared 30‐SB composite (30 wt% SnO2/Bi2O4) exhibits the highest photocatalytic activity toward TC degradation. The removal efficiency of TC was up to 84.3% within 120 min. The rate constant k for the reaction of 30‐SB composite is 0.029017 min−1, which is 13.4 and 1.8 times as high as that of SnO2 and Bi2O4, respectively. CONCLUSION The significantly boosted photocatalytic activity is attributed to the formation of Z‐scheme heterojunctions between SnO2 and Bi2O4. Z‐scheme charge transfer promoted the effective separation of photogenerated carriers and ensured that the holes with higher oxidative activity and electrons with stronger reducibility participate in the production of •OH and •O2− as well as direct degradation of TC. This work will provide a new modification strategy for the potentially excellent photocatalyst Bi2O4. © 2022 Society of Chemical Industry (SCI).

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“…However, the short lifetime of photogenerated electrons seriously hinders its photocatalytic performance. After that, the photocatalysis was enhanced by compounding with other catalysts, such as g-C 3 N 4 /Bi 2 O 4 , [5] Bi 2 O 3 /TiO 2 , [6] m-Bi 2 O 4 /Bi 4 O 7 , [7] etc. In bismuth-based materials, bismuth in BiO 2-x has two valence states, which can reduce the bandgap and have good photocatalytic properties.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Activity of AgI/BiO_2‐x Heterojunction Photocatalyst

et al. 2021

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In this paper, a new type of AgI/BiO 2-x was successfully obtained. The crystal structure, micro morphology, element distribution and light response ability of AgI, BiO 2-x and AgI/ BiO 2-x were observed by XRD, SEM, EDS-mapping and DRS. The results show that the heterojunction between AgI and BiO 2-x is conducive to electron transfer and improve the separation efficiency of photogenerated carriers. When AgI/BiO 2-x was used to degrade rhodamine B, the reaction rate of the best sample is 0.1405 min À 1 , which is 6 folds more than BiO 2-x and 2.9 times higher than AgI. After four times cycling experiments, the degradation rate was maintained excellent. Hence, this work provides an effective and steady photocatalyst.

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In-situ construction of high-efficiency phase-transition induced m-Bi2O4/Bi4O7 surface heterojunction photocatalysts and mechanism investigation

Cited by 18 publications

References 48 publications

BiOCl Nanorings with Co-Exposed (110)/(001) Facets for Photocatalytic Degradation of Organic Dyes

BiOCl Nanorings with Co-Exposed (110)/(001) Facets for Photocatalytic Degradation of Organic Dyes

Bi₂O₄ decorated with SnO₂ nanoparticles as direct Z‐scheme heterojunction for enhanced degradation of tetracycline under visible light irradiation

Enhanced Photocatalytic Activity of AgI/BiO_2‐x Heterojunction Photocatalyst

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In-situ construction of high-efficiency phase-transition induced m-Bi2O4/Bi4O7 surface heterojunction photocatalysts and mechanism investigation

Cited by 18 publications

References 48 publications

BiOCl Nanorings with Co-Exposed (110)/(001) Facets for Photocatalytic Degradation of Organic Dyes

BiOCl Nanorings with Co-Exposed (110)/(001) Facets for Photocatalytic Degradation of Organic Dyes

Bi2O4 decorated with SnO2 nanoparticles as direct Z‐scheme heterojunction for enhanced degradation of tetracycline under visible light irradiation

Enhanced Photocatalytic Activity of AgI/BiO2‐x Heterojunction Photocatalyst

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Bi₂O₄ decorated with SnO₂ nanoparticles as direct Z‐scheme heterojunction for enhanced degradation of tetracycline under visible light irradiation

Enhanced Photocatalytic Activity of AgI/BiO_2‐x Heterojunction Photocatalyst