A Z-scheme CdS/BiVO4 photocatalysis towards Eriochrome black T: An experimental design and mechanism study

Hemmatpour, Pooneh; Nezamzadeh‐Ejhieh, Alireza

doi:10.1016/j.chemosphere.2022.135925

Cited by 58 publications

(19 citation statements)

References 101 publications

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“…With the above band structures, Z-scheme or type II heterojunction may be constructed between ZIS and BFO. The formation of a Z-scheme heterojunction occurs when electrons from the CB of BFO transfer to the VB of ZIS. , However, the charge density difference obtained from DFT confirms that the electron flow is from the CB of ZIS to that of BFO. Thus, the e – excited to the CB of ZIS transfer to the CB of BFO due to their potential difference, while the h + in BFO transfer to ZIS.…”

Section: Resultsmentioning

confidence: 93%

Photodegradation of Xanthate Using a Bi₂Fe₄O₉/ZnIn₂S₄Heterojunction: Experimental and DFT Studies

Nie,

Liu,

Liu

et al. 2023

Ind. Eng. Chem. Res.

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Bi 2 Fe 4 O 9 /ZnIn 2 S 4 (BFO/ZIS) composites are synthesized by using a facile impregnation method and tested for the photocatalytic degradation of xanthate for the first time. The effects of multiple parameters, including catalyst dosage and the pH value of solution, on xanthate photodegradation are investigated systematically. Furthermore, the photocatalytic mechanisms of BFO/ZIS are proposed based on various characterizations and density functional theory calculations. Results show that the degradation efficiency of 30BFO/ZIS is 98.25% during 90 min of visible light irradiation, which is 2.63 and 2.89 times higher than that of pure ZIS and BFO, respectively. This is mainly because the type II heterojunction formed between BFO and ZIS improves the separation of photogenerated carriers. Furthermore, the xanthate photodegradation efficiency of 30BFO/ZIS decreases slightly from 98.25 to 92.86% after four cycles, indicating its excellent durability and stability. Finally, the chemical oxygen demand (COD) removal efficiency of 30BFO/ZIS is up to 81.06%, exhibiting a high degree of mineralization.

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Section: Resultsmentioning

confidence: 93%

Photodegradation of Xanthate Using a Bi₂Fe₄O₉/ZnIn₂S₄Heterojunction: Experimental and DFT Studies

Nie,

Liu,

Liu

et al. 2023

Ind. Eng. Chem. Res.

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“…Thus, especial attention has been paid to heterogeneous photocatalysis based on the illumination of a semiconducting compound under UV or visible light irradiation. − This AOP strategy is an environmentally friendly, low-cost technology with high efficiency for degrading/mineralizing various organic pollutants without secondary pollution. Its overall efficiency (including the adsorption and photodegradation of the pollutant molecules) depends on the operational parameters. − …”

Section: Photodegradation Of Organic Pollutantsmentioning

confidence: 99%

A Comprehensive Review on the Boosted Effects of Anion Vacancy in the Heterogeneous Photocatalytic Degradation, Part II: Focus on Oxygen Vacancy

Rezaei,

Nezamzadeh-Ejhieh,

Massah

2024

ACS Omega

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Environmental problems, including the increasingly polluted water and the energy crisis, have led to a need to propose novel strategies/methodologies to contribute to sustainable progress and enhance human well-being. For these goals, heterogeneous semiconducting-based photocatalysis is introduced as a green, eco-friendly, cost-effective, and effective strategy. The introduction of anion vacancies in semiconductors has been wellknown as an effective strategy for considerably enhancing the photocatalytic activity of such photocatalytic systems, giving them the advantages of promoting light harvesting, facilitating photogenerated electron−hole pair separation, optimizing the electronic structure, and enhancing the yield of reactive radicals. This Review will introduce the effects of anion vacancy-dominated photodegradation systems. Then, their mechanism will illustrate how an anion vacancy changes the photodegradation pathway to enhance the degradation efficiency toward pollutants and the overall photocatalytic performance. Specifically, the vacancy defect types and the methods of tailoring vacancies will be briefly illustrated, and this part of the Review will focus on the oxygen vacancy (OV) and its recent advances. The challenges and development issues for engineered vacancy defects in photocatalysts will also be discussed for practical applications and to provide a promising research direction. Finally, some prospects for this emerging field will be proposed and suggested. All permission numbers for adopted figures from the literature are summarized in a separate file for the Editor.

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“…The E g can be obtained by drawing a plot of [F(R)hυ] 1/2 versus the photon energy (hυ) and extrapolating the plots to [F(R)hυ] 1/2 = 0 (Fig. 4b) 44 . The E g values were determined to be about 2.11, 1.87, and 2.03 eV for SnIn 4 S 8 , SmVO 4 , and SnIn 4 S 8 /SmVO 4 , respectively, thereby guaranteeing their utilization under visible light.…”

Section: Band Gap Energy Band Edge Potentials and E --H + Separation ...mentioning

confidence: 99%

Hexavalent chromium reduction and Rhodamine B degradation by visible-light-driven photocatalyst of stannum indium sulfide-samarium vanadate

et al. 2023

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In this study, a flower-like SnIn4S8/SmVO4 heterostructure was synthesized by applying a hydrothermal approach and used as a visible-light-driven photocatalyst to remove hexavalent chromium (Cr6+) and Rhodamine B (RhB). The process design and optimization were carried out by response surface methodology (RSM). An artificial neural network (ANN) was also used to determine the relative importance of operational factors. Under RSM-based optimal conditions, the Cr6+ and RhB removal efficiency reached 90.93 and 97.57%, respectively. Process modeling by ANN revealed pH as the most influential factor in Cr6+ and dye removal. The predominant photocatalytic activity of SnIn4S8/SmVO4 was attributed to its Z-scheme structure, leading to the significant separation of charge carriers and conserving the redox capacity of the photogenerated electron-holes. Kinetic studies revealed that the SnIn4S8/SmVO4 could achieve considerable rate constants of 0.036 and 0.080 min−1 to remove Cr6+ and RhB, respectively. Furthermore, the catalyst’s reusability was confirmed under optimal conditions.

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A Z-scheme CdS/BiVO4 photocatalysis towards Eriochrome black T: An experimental design and mechanism study

Cited by 58 publications

References 101 publications

Photodegradation of Xanthate Using a Bi₂Fe₄O₉/ZnIn₂S₄Heterojunction: Experimental and DFT Studies

Photodegradation of Xanthate Using a Bi₂Fe₄O₉/ZnIn₂S₄Heterojunction: Experimental and DFT Studies

A Comprehensive Review on the Boosted Effects of Anion Vacancy in the Heterogeneous Photocatalytic Degradation, Part II: Focus on Oxygen Vacancy

Hexavalent chromium reduction and Rhodamine B degradation by visible-light-driven photocatalyst of stannum indium sulfide-samarium vanadate

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A Z-scheme CdS/BiVO4 photocatalysis towards Eriochrome black T: An experimental design and mechanism study

Cited by 58 publications

References 101 publications

Photodegradation of Xanthate Using a Bi2Fe4O9/ZnIn2S4Heterojunction: Experimental and DFT Studies

Photodegradation of Xanthate Using a Bi2Fe4O9/ZnIn2S4Heterojunction: Experimental and DFT Studies

A Comprehensive Review on the Boosted Effects of Anion Vacancy in the Heterogeneous Photocatalytic Degradation, Part II: Focus on Oxygen Vacancy

Hexavalent chromium reduction and Rhodamine B degradation by visible-light-driven photocatalyst of stannum indium sulfide-samarium vanadate

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Product

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Photodegradation of Xanthate Using a Bi₂Fe₄O₉/ZnIn₂S₄Heterojunction: Experimental and DFT Studies

Photodegradation of Xanthate Using a Bi₂Fe₄O₉/ZnIn₂S₄Heterojunction: Experimental and DFT Studies