Facile and rapid synthesis of a novel spindle-like heterojunction BiVO<sub>4</sub> showing enhanced visible-light-driven photoactivity

Chen, Fangyan; Zhang, Xi; Tang, Yubin; Wang, Xingang; Shu, Keke

doi:10.1039/c9ra07891f

Cited by 24 publications

(6 citation statements)

References 36 publications

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“…As a result, the E CB of CeO 2 and the LUMO potential of MIL101(Fe) are −0.41 eV and − 0.67 eV, respectively. According to the formular: E g = E VB ‐E CB , 55 the valence band potential (E VB ) of CeO 2 and the highest occupied molecular orbital (HOMO) potential of MIL101(Fe) are obtained as 2.48 eV and 2.07 eV, respectively.…”

Section: Resultsmentioning

confidence: 99%

A novel CeO₂/MIL101(Fe) heterojunction for enhanced photocatalytic degradation of tetracycline under visible‐light irradiation

Chen

Bian

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND MIL101(Fe) has attracted growing attention as a potential new photocatalyst. However, the drawbacks of easy recombination of photogenerated electron–hole pairs result in unsatisfactory activity. RESULTS In this work, to enhance the photocatalytic activity of MIL101(Fe), CeO2 nanorods were attached on the surface of octahedral MIL101(Fe) to obtain a novel 1D/3D heterojunction CeO2/MIL101(Fe). The as‐synthesized samples were characterized by a series of methods. The photocatalytic activity of CeO2/MIL101(Fe) was investigated by photodegradation of tetracycline under visible‐light irradiation. Compared with pristine CeO2 and MIL101(Fe), the as‐prepared CeO2/MIL101(Fe) composite with CeO2 content of 10 wt% exhibited a superior photocatalytic activity, with a tetracycline (TC) degradation efficiency of 83.5% and a TOC removal rate of 55.7% within 120 min. CONCLUSION The enhanced photocatalytic performance is attributed to the efficient separation of photogenerated charge carriers resulting from the formation of type‐II heterojunction between CeO2 and MIL101(Fe). This work provides a new approach for the fabrication of MOF‐based photocatalysts with high activity. © 2022 Society of Chemical Industry (SCI).

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Section: Resultsmentioning

confidence: 99%

A novel CeO₂/MIL101(Fe) heterojunction for enhanced photocatalytic degradation of tetracycline under visible‐light irradiation

Chen

Bian

et al. 2022

J of Chemical Tech & Biotech

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“…[1][2][3] Semiconductor photocatalysis has been considered as a desirable technology to solve both the energy crisis and environmental pollution, and has received extensive attention. [4][5][6][7] 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.…”

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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“…Photocatalysis is considered as an alternative and promising strategy for degradation and mineralization of antibiotics due to its low cost, high efficiency, mild reaction condition, and no secondary pollution [9][10][11]. A variety of semiconductors have been used for antibiotic degradation [12][13][14][15][16][17]. However, poor adsorptive ability, low quantum yield, and rapid recombination of photogenerated carriers restrict the real applications of photocatalysis in the removal of CTC from wastewater [18].…”

Section: Introductionmentioning

confidence: 99%

Spindle-like MIL101(Fe) decorated with Bi₂O₃ nanoparticles for enhanced degradation of chlortetracycline under visible-light irradiation

Hao¹,

Chen²,

Bian³

et al. 2022

Beilstein J. Nanotechnol.

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Improving the photocatalytic performance of metal–organic frameworks (MOFs) is an important way to expand its potential applications. In this work, zero-dimensional (0D) Bi2O3 nanoparticles were anchored to the surface of tridimensional (3D) MIL101(Fe) by a facile solvothermal method to obtain a novel 0D/3D heterojunction Bi2O3/MIL101(Fe) (BOM). The morphology and optical properties of the as-prepared Bi2O3/MIL101(Fe) composite were characterized. The photocatalytic activity of the synthesized samples was evaluated by degrading chlortetracycline (CTC) under visible-light irradiation. The obtained BOM-20 composite (20 wt % Bi2O3/MIL101(Fe)) exhibits the highest photocatalytic activity with CTC degradation efficiency of 88.2% within 120 min. The degradation rate constant of BOM-20 toward CTC is 0.01348 min−1, which is 5.9 and 4.3 times higher than that of pristine Bi2O3 and MIL101(Fe), respectively. The enhanced photocatalytic activity is attributed to the formation of a Z-scheme heterojunction between Bi2O3 and MIL101(Fe), which is conducive to the rapid separation of photogenerated carriers and the enhancement of photogenerated electron and hole redox capacity. The intermediate products were analyzed by liquid chromatography–mass spectrometry (LC–MS), and a possible photocatalytic degradation path of CTC was proposed. This work provides a new perspective for the preparation of efficient MOF-based photocatalysts.

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Facile and rapid synthesis of a novel spindle-like heterojunction BiVO₄ showing enhanced visible-light-driven photoactivity

Abstract: A novel spindle-like monoclinic–tetragonal BiVO4 heterojunction is rapidly synthesized via a pressure-controllable microwave method.

Cited by 24 publications

References 36 publications

A novel CeO₂/MIL101(Fe) heterojunction for enhanced photocatalytic degradation of tetracycline under visible‐light irradiation

A novel CeO₂/MIL101(Fe) heterojunction for enhanced photocatalytic degradation of tetracycline under visible‐light irradiation

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

Spindle-like MIL101(Fe) decorated with Bi₂O₃ nanoparticles for enhanced degradation of chlortetracycline under visible-light irradiation

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Facile and rapid synthesis of a novel spindle-like heterojunction BiVO4 showing enhanced visible-light-driven photoactivity

Abstract: A novel spindle-like monoclinic–tetragonal BiVO4 heterojunction is rapidly synthesized via a pressure-controllable microwave method.

Cited by 24 publications

References 36 publications

A novel CeO2/MIL101(Fe) heterojunction for enhanced photocatalytic degradation of tetracycline under visible‐light irradiation

A novel CeO2/MIL101(Fe) heterojunction for enhanced photocatalytic degradation of tetracycline under visible‐light irradiation

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

Spindle-like MIL101(Fe) decorated with Bi2O3 nanoparticles for enhanced degradation of chlortetracycline under visible-light irradiation

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Facile and rapid synthesis of a novel spindle-like heterojunction BiVO₄ showing enhanced visible-light-driven photoactivity

A novel CeO₂/MIL101(Fe) heterojunction for enhanced photocatalytic degradation of tetracycline under visible‐light irradiation

A novel CeO₂/MIL101(Fe) heterojunction for enhanced photocatalytic degradation of tetracycline under visible‐light irradiation

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

Spindle-like MIL101(Fe) decorated with Bi₂O₃ nanoparticles for enhanced degradation of chlortetracycline under visible-light irradiation