A novel 0D/2D WS2/BiOBr heterostructure with rich oxygen vacancies for enhanced broad-spectrum photocatalytic performance

Fu, Shuai; Yuan, Wei; Liu, Xianming; Yan, Yunhui; Li, Haiping; Li, Li; Zhao, Fengying; Zhou, Junhu

doi:10.1016/j.jcis.2020.02.077

Cited by 121 publications

(25 citation statements)

References 74 publications

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“…The efficiency of semiconductor-based photocatalyst, however, is limited by insufficient light utilization and poor effective surface area. To overcome these issues, two-dimensional (2D) layered structured transition metal chalcogenides (TMDC) based photocatalysts have been developed, which tremendously absorb the visible light and also provide sufficient effective surface area 16 – 18 . In addition, layered structured TMDC based photocatalyst exhibits outstanding chemical, optical and electronic properties which make them unique for environmental remediation and energy production applications 19 , 20 .…”

Section: Introductionmentioning

confidence: 99%

Enhanced sunlight driven photocatalytic activity of In2S3 nanosheets functionalized MoS2 nanoflowers heterostructures

Singh

Soni

2021

Sci Rep

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Visible light-sensitive 2D-layered based photocatalytic systems have been proven one of the effective recent trends. We report the preparation of a 2D-layered based In2S3–MoS2 nanohybrid system through a facile hydrothermal method, capable of efficiently degrading of organic contaminants with remarkable efficiency. Transmission electron microscopy (TEM) results inferred the attachment of 2D-layered In2S3 sheets with the MoS2 nanoflakes. Field emission SEM studies with chemical mapping confirm the uniform distribution of Mo, In, and S atoms in the heterostructure, affirming sample uniformity. X-ray diffraction, X-ray photoelectron spectroscopy, and Raman spectroscopy results confirm the appearance of 2H-MoS2 and β-In2S3 in the grown heterostructures. UV-DRS results reveal a significant improvement in the optical absorbance and significant bandgap narrowing (0.43 eV) in In2S3–MoS2 nanohybrid compared to pristine In2S3 nanosheets in the visible region. The effective bandgap narrowing facilitates the charge transfer between MoS2 and In2S3 and remarkably improves the synergistic effect. Effective bandgap engineering and improved optical absorption of In2S3–MoS2 nanohybrids are favorable for enhancing their charge separation and photocatalytic ability. The photocatalytic decomposition efficiency of the pristine In2S3 nanosheets and In2S3–MoS2 nanohybrids sample is determined by the decomposing of methylene blue and oxytetracycline molecules under natural sunlight. The optimized In2S3–MoS2 nanohybrids can decompose 97.67% of MB and 76.3% of OTC-HCl molecules solution in 8 min and 40 min of exposure of sunlight respectively. 2D-layered In2S3-MoS2 nanohybrids reveal the tremendous remediation performance towards chemical contaminations and pharmaceutical waste, which indicates their applicability in industrial and practical applications.

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Section: Introductionmentioning

confidence: 99%

Enhanced sunlight driven photocatalytic activity of In2S3 nanosheets functionalized MoS2 nanoflowers heterostructures

Singh

Soni

2021

Sci Rep

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“…The change amplitude in binding energies of O–Fe and O–Ta decreases in the following order: Cu 2 O/V O–Fe,Ta -SFTO > Cu 2 O/V O–Fe -SFTO > Cu 2 O/SFTO (Table S3), which suggests that sample Cu 2 O/V O–Fe,Ta -SFTO has the strongest interface interaction, followed by Cu 2 O/V O–Fe -SFTO. The shifted O 1s and Fe 2p peaks indicate that the SFTO component may combine with the Cu 2 O component via Fe–O–Cu(I) bonds . That is, Cu 2 O and SFTO components of sample Cu 2 O/V O–Fe,Ta -SFTO are mainly connected by the interfacial Fe–O–Cu(I) bonds, and this interaction also affects the chemical environment of Ta atoms, or vice versa, the Ta atoms also have an influence on the interface Fe–O–Cu(I) bonds, as proved by FT-IR spectra (Figure S8).…”

Section: Resultsmentioning

confidence: 81%

Selective Bonding Effect of Heterologous Oxygen Vacancies in Z-Scheme Cu₂O/SrFe_0.5Ta_0.5O₃ Heterojunctions for Constructing Efficient Interfacial Charge-Transfer Channels and Enhancing Photocatalytic NO Removal Performances

et al. 2021

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An interfacial structure is crucial to the photoinduced electron transport for a heterostructure photocatalyst. Constructing an interfacial electron channel with an optimized interfacial structure can efficiently improve the electron-transfer efficiency. Herein, the rapid electron-transfer channels were built up in a Cu2O/SrFe0.5Ta0.5O3 heterojunction (Cu2O/SFTO) based on the selective bonding effect of heterologous surface oxygen vacancies in the SFTO component. The heterologous surface oxygen vacancies, namely, VO–Fe and VO–Ta, respectively, adjacent to Fe and Ta atoms, were introduced into fabricating the Z-scheme Cu2O/SFTO heterojunction. Compared with sample Cu2O/SFTO with VO–Fe, the photocatalytic NO removal efficiency of sample Cu2O/SFTO with VO‑Fe and VO‑Ta was increased by 22.5%. The enhanced photocatalytic performance originated from the selective bonding effect of heterologous VO–Fe and VO–Ta on the interfacial electron-separating and -transfer efficiency. VO–Fe is the main body to construct the interfacial electron-transfer channels by forming interfacial Fe–O–Cu(I) bonds, which causes lattice distortion at the interface, and VO–Ta can optimize the structure of interfacial channels by balancing the electron density of SFTO to control the average space of the interface transition zone. This research provides a new cognitive perspective for constructing double perovskite oxide-based heterostructure photocatalysts.

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“…In TiO 2 /g-C 3 N 4 , there was tensile stress induced by TiO 2 and compressive stress from C 3 N 4 , with detrimental influence on the heterostructure interfacial area. However, using the same irradiation scenario (Vis, 500 W for 100 min) but employing WS 2 /BiOBr heterostructure [ 68 ], the photocatalytic efficiency of RhB (20 mg/L) has increased up to 95%, due to high Vis absorbance attributed to both partners. Even if the photocatalytic efficiency is lower compared with g-C 3 N 4 /ZnO, the RhB concentration was double.…”

Section: Photocatalytic Organic Pollutants Removal By Heterostructmentioning

confidence: 99%

“…The TC solution with 20 mg/L concentration was used to study the photocatalytic activity of two Z-mechanism heterostructures (MoS 2 /g-C 3 N 4 /Bi 24 O 31 Cl 10 [ 94 ] and CuBi 2 O 4 /Bi 2 WO 6 [ 95 ]), one type II heterostructure (La(OH) 3 /BiOCl [ 96 ]) and one p-n heterostructure (WS 2 /BiOBr [ 68 ]). La (OH) 3 /BiOCl type II heterostructure with sheets morphology obtained by microwave method shows very low energy consumption and reach 85% photocatalytic efficiency in 60 min of irradiation with a 5 W Vis source.…”

Section: Photocatalytic Organic Pollutants Removal By Heterostructmentioning

confidence: 99%

The Influence of Photoactive Heterostructures on the Photocatalytic Removal of Dyes and Pharmaceutical Active Compounds: A Mini-Review

Eneşca

Andronic

2020

Nanomaterials

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The diversification of pollutants type and concentration in wastewater has underlined the importance of finding new alternatives to traditional treatment methods. Advanced oxidation processes (AOPs), among others, are considered as promising candidate to efficiently remove organic pollutants such as dyes or pharmaceutical active compounds (PhACs). The present minireview resumes several recent achievements on the implementation and optimization of photoactive heterostructures used as photocatalysts for dyes and PhACs removal. The paper is focused on various methods of enhancing the heterostructure photocatalytic properties by optimizing parameters such as synthesis methods, composition, crystallinity, morphology, pollutant concentration and light irradiation.

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A novel 0D/2D WS2/BiOBr heterostructure with rich oxygen vacancies for enhanced broad-spectrum photocatalytic performance

Cited by 121 publications

References 74 publications

Enhanced sunlight driven photocatalytic activity of In2S3 nanosheets functionalized MoS2 nanoflowers heterostructures

Enhanced sunlight driven photocatalytic activity of In2S3 nanosheets functionalized MoS2 nanoflowers heterostructures

Selective Bonding Effect of Heterologous Oxygen Vacancies in Z-Scheme Cu₂O/SrFe_0.5Ta_0.5O₃ Heterojunctions for Constructing Efficient Interfacial Charge-Transfer Channels and Enhancing Photocatalytic NO Removal Performances

The Influence of Photoactive Heterostructures on the Photocatalytic Removal of Dyes and Pharmaceutical Active Compounds: A Mini-Review

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A novel 0D/2D WS2/BiOBr heterostructure with rich oxygen vacancies for enhanced broad-spectrum photocatalytic performance

Cited by 121 publications

References 74 publications

Enhanced sunlight driven photocatalytic activity of In2S3 nanosheets functionalized MoS2 nanoflowers heterostructures

Enhanced sunlight driven photocatalytic activity of In2S3 nanosheets functionalized MoS2 nanoflowers heterostructures

Selective Bonding Effect of Heterologous Oxygen Vacancies in Z-Scheme Cu2O/SrFe0.5Ta0.5O3 Heterojunctions for Constructing Efficient Interfacial Charge-Transfer Channels and Enhancing Photocatalytic NO Removal Performances

The Influence of Photoactive Heterostructures on the Photocatalytic Removal of Dyes and Pharmaceutical Active Compounds: A Mini-Review

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Selective Bonding Effect of Heterologous Oxygen Vacancies in Z-Scheme Cu₂O/SrFe_0.5Ta_0.5O₃ Heterojunctions for Constructing Efficient Interfacial Charge-Transfer Channels and Enhancing Photocatalytic NO Removal Performances