Fabrication of visible-light-active Bi/BiOI-Bi2O3 composite with enhanced photocatalytic activity

Wang, Qi; Wang, Hong; Gao, Qiaoyuan; Lin, Dagang; Fan, Yongjie; Duan, Ran; Cong, Yanqing; Zhang, Yi

doi:10.1016/j.jcis.2019.04.044

Cited by 52 publications

(19 citation statements)

References 48 publications

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“…For 600-BiOI sample, it was totally transfer to the Bi metal. The generation of Bi metal is mainly due to the reduction of H 2 [18,19]. Moreover, there is no impurity peak can be detected in this nanocomposite system.…”

Section: Xrdmentioning

confidence: 83%

“…Besides, the I 3d high-resolution spectra (Fig. 3f), those peaks located at 630.6 and 619.1 eV was ascribed to I 3d 3/2 and I 3d 5/2 , corresponding to the monovalent oxidation state of iodine (I − ) [19]. Furthermore, those I − of 500-BiOI show almost the same binding energy with pristine BiOI, suggesting that I − was developed to steam and release during the annealing process.…”

Section: Xps Analysismentioning

confidence: 94%

“…Besides, based on the above analysis, the optimal photocatalysis performance of 500-BiOI was ascribed to two critical reasons: Firstly, a suitable amount of surface oxygen vacancy can capture electron donors and act as an adsorption site to enrich the amount of MC-LR at the surface. Secondly, the SPR effect of Bi can quickly transfer the electron from the oxygen vacancy site for improving the charge separation ability of the nanocomposite [19]. Moreover, based on the XRD results, the 600-BiOI was utterly transformed into metallic Bi particle along with the disappearance of the nanocomposite.…”

Section: Photocatalysis and Stability Analysismentioning

confidence: 99%

“…Simultaneously, the existence of the Bi particle can directly activate the dissolved O 2 and generated the •O 2 − . Moreover, the residual photogenerated hole (h + ) in the negative valence band (VB) of the BiOI can directly react with MC-LR [19]. In this way, the 500-BiOI show the best performance than that of the other samples.…”

Section: Photocatalysis Mechanismmentioning

confidence: 99%

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Construction of oxygen vacancy modified Bi/BiOI nanocomposite with improved photocatalytic activity for microcystin-LR degradation

Xiao

Wang³

et al. 2020

J Mater Sci: Mater Electron

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Herein, a series of Bi/BiOI nanocomposites with oxygen vacancy modification have been prepared by the hydrogenated method. The Bi metal and oxygen vacancy were generated after annealing at high temperature concurrently. The obtained composite Bi/BiOI nanocomposite (label as x-BiOI, x means different annealing temperature) was used as a model photocatalyst to research the leading effects of oxygen vacancy and surface plasmon resonance (SPR) effect in microcystin-LR (MC-LR) photodegradation. As one of the most dangerous microcystins, the removal of MC-LR is urgent and meaningful. Moreover, based on the MC-LR photodegradation results, the photocatalytic activity of all oxygen vacancy modified Bi/ BiOI nanocomposites was better than that of pristine BiOI. Meanwhile, the 500-BiOI photocatalysis shows the optimal photocatalysis performance. In detail, the degradation rate constant of 500-BiOI (0.56196 h −1) is around five times higher than that of pristine BiOI (0.1047 h −1). The microcystin toxin of intermediate was also analyzed systematically. The probable mechanism of the obtained sample was proposed for better understanding the MC-LR photodegradation process. This work provides a critical reference in water pollution treatment.

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Section: Xrdmentioning

confidence: 83%

Section: Xps Analysismentioning

confidence: 94%

Section: Photocatalysis and Stability Analysismentioning

confidence: 99%

Section: Photocatalysis Mechanismmentioning

confidence: 99%

See 2 more Smart Citations

Construction of oxygen vacancy modified Bi/BiOI nanocomposite with improved photocatalytic activity for microcystin-LR degradation

Xiao

Wang³

et al. 2020

J Mater Sci: Mater Electron

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“…However, these single‐component photocatalysts still suffer from low efficiency, significantly ratarding their practical application . Encouragingly, the integration of two or three semiconductors which have fine photocatalytic properties has been demonstrated to be a useful approach to overcome their drawbacks for improving photocatalytic acitivity …”

Section: Introductionmentioning

confidence: 99%

Synthesis of noble‐metal‐free ternary K₇HNb₆O₁₉/Cd_0.5Zn_0.5S/g‐C₃N₄ tandem heterojunctions for efficient photocatalytic performance under visible light

Zhou

Zhao

et al. 2019

Applied Organom Chemis

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Exploring noble-metal-free, highly active and durable catalysts is vital to get to grips with the energy and environmental issues. Herein, we first dexterously design and synthesize a class of ternary Nb 6 /CZS/g-CN photocatalysts for the removal of hexavalent chromium Cr (VI) and organic dye pollutant (MO) from wastewater under visible-light irradiation. A heterojunction Nb 6 -1/CZS/g-CN loaded with 0.01 g K 7 HNb 6 O 19 showed excellent photocatalytic performance, with the MO photodegradation efficiency of 94% in 1 h and the Cr (VI) (150 mg/l) photoreduction efficiency as high as 91% in 2 hr. The main active species were deemed to be O 2 .-. Additionally, the as-prepared ternary heterojunction exhibits superior hydrogen evolution reaction (HER) rate. A heterojunction Nb 6 -4/CZS/g-CN loaded with 0.5 g K 7 HNb 6 O 19 exhibited the highest H 2 evolution rate as high as 1777.86 μmol h −1 g −1 under visible-light illumination, which is increased to 5.7 and 2.7 times that of bare CZS and biphase heterojunction CZS/g-CN . These findings afford a new class of promising low-cost photocatalyst bodying for its huge potential value in sustainable energy development and wastewater treatment.

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Construction of Ternary Bismuth‐Based Heterojunction by Using (BiO)₂CO₃ as Electron Bridge for Highly Efficient Degradation of Phenol

Shen

Yang

Xue

et al. 2023

Chemistry A European J

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Inspired by nature, it has been considered an effective approach to design artificial photosynthetic system by fabricating Z-scheme photocatalysts to eliminate environmental issues and alleviate the global energy crisis. However, the development of low cost, environment-friendly, and highefficient photocatalysts by utilizing solar energy still confronts huge challenge. Herein, we constructed a Bi 2 O 3 /(BiO) 2 CO 3 / Bi 2 MoO 6 ternary heterojunction via a facile solvothermal method and calcination approach and used it as a photocatalyst for the degradation of phenol. The optimized Bi 2 O 3 / (BiO) 2 CO 3 /Bi 2 MoO 6 heterojunction delivers a considerable activity for phenol photodegradation with an impressive removal efficiency of 98.8 % and about total organic carbon (TOC) of 68 % within 180 min under visible-light irradiation. The excellent photocatalytic activity was ascribed to the formation of a Z-scheme heterojunction, more importantly, the presence of (BiO) 2 CO 3 as an electron bridge greatly shortens the migration distance of photogenerated electron from E CB of Bi 2 O 3 to E VB of Bi 2 MoO 6 , thus prolonging the lifetime of photogenerated electrons, which is verified by trapping experiments, electron spin-resonance spectroscopy (ESR) results, and density functional theory (DFT) calculations. This work provides a potential strategy to fabricate highly efficient Bi-based Z-scheme photocatalysts with wide application prospects in solar-to-fuel conversion and environmental protection.

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Fabrication of visible-light-active Bi/BiOI-Bi2O3 composite with enhanced photocatalytic activity

Cited by 52 publications

References 48 publications

Construction of oxygen vacancy modified Bi/BiOI nanocomposite with improved photocatalytic activity for microcystin-LR degradation

Construction of oxygen vacancy modified Bi/BiOI nanocomposite with improved photocatalytic activity for microcystin-LR degradation

Synthesis of noble‐metal‐free ternary K₇HNb₆O₁₉/Cd_0.5Zn_0.5S/g‐C₃N₄ tandem heterojunctions for efficient photocatalytic performance under visible light

Construction of Ternary Bismuth‐Based Heterojunction by Using (BiO)₂CO₃ as Electron Bridge for Highly Efficient Degradation of Phenol

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Fabrication of visible-light-active Bi/BiOI-Bi2O3 composite with enhanced photocatalytic activity

Cited by 52 publications

References 48 publications

Construction of oxygen vacancy modified Bi/BiOI nanocomposite with improved photocatalytic activity for microcystin-LR degradation

Construction of oxygen vacancy modified Bi/BiOI nanocomposite with improved photocatalytic activity for microcystin-LR degradation

Synthesis of noble‐metal‐free ternary K7HNb6O19/Cd0.5Zn0.5S/g‐C3N4 tandem heterojunctions for efficient photocatalytic performance under visible light

Construction of Ternary Bismuth‐Based Heterojunction by Using (BiO)2CO3 as Electron Bridge for Highly Efficient Degradation of Phenol

Contact Info

Product

Resources

About

Synthesis of noble‐metal‐free ternary K₇HNb₆O₁₉/Cd_0.5Zn_0.5S/g‐C₃N₄ tandem heterojunctions for efficient photocatalytic performance under visible light

Construction of Ternary Bismuth‐Based Heterojunction by Using (BiO)₂CO₃ as Electron Bridge for Highly Efficient Degradation of Phenol