Synergistic effects in simultaneous photocatalytic removal of Cr(VI) and tetracycline hydrochloride by Z-scheme Co3O4/Ag/Bi2WO6 heterojunction

Wan, Jun; Xue, Peng; Wang, Ruimiao; Liu, Lin; Liu, Enzhou; Bai, Xue; Hu, Xiaoyun

doi:10.1016/j.apsusc.2019.03.246

Cited by 119 publications

(34 citation statements)

References 51 publications

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“…The reason is that the establishment of heterojunction cannot only effectively broaden the range of light response and enhance the light absorption of catalyst but also achieve the effective separation of photo-generated carriers under the action of internal electric field and improve the catalytic activity [ 28 , 29 ]. Many Bi 2 WO 6 -based heterojunction photocatalysts, such as Bi 2 WO 6 /MoS 2 [ 30 ], Bi 2 WO 6 /Fe 2 O 3 [ 25 ], Bi 2 WO 6 /Bi 2 S 3 [ 31 ], CdS/Bi/Bi 2 WO 6 [ 32 ], meso-tetra (4-carboxyphenyl) porphyrin/rGO/Bi 2 WO 6 [ 33 ], and Co 3 O 4 /Ag/Bi 2 WO 6 [ 34 ], have been used to improve the performance of pure Bi 2 WO 6 . Huang et al successfully prepared a new flower-shaped AgBr/Bi 2 WO 6 catalyst, which showed good catalytic performance in the degradation of tetracycline (TC) under visible light (vis-light) irradiation [ 35 ].…”

Section: Introductionmentioning

confidence: 99%

Spherical Bi2WO6/Bi2S3/MoS2 n-p Heterojunction with Excellent Visible-Light Photocatalytic Reduction Cr(VI) Activity

Ren

Gong

et al. 2020

Nanomaterials

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Exploiting excellent photocatalytic activity and stable heterostructure composites are of critical importance for environmental sustainability. The spherical Bi2WO6/Bi2S3/MoS2 n-p heterojunction is first prepared via an in situ hydrothermal method using Bi2WO6, Na2MoO4·2H2O, and CH4N2S, in which the intermediate phase Bi2S3 is formed due to chemical coupling interaction of Bi2WO6 and CH4N2S. Scanning electron microscopy indicates that the compactness of the sample can be easily adjusted by changing the contents of S and Mo sources in the solution. The results of ultraviolet–visible (UV–vis) diffuse reflectance spectra, photoluminescence, transient photocurrent response, and electrochemical impedance spectra indicate that the formation of heterojunctions contributes to enhancing visible-light utilization and promoting photogenerated carrier separation and transfer. The composite material is used as a catalyst for the visible light photocatalytic reduction of Cr(VI). Remarkably, the optimal Bi2WO6/Bi2S3/MoS2 n-p heterojunction achieves the greatest Cr(VI) reduction rate of 100% within 75 min (λ > 420 nm, pH = 2); this rate is considerably better than the Cr(VI) reduction rate of pure Bi2WO6. The recycling experiment also reveals that the photocatalytic performance of the n-p heterojunction toward Cr(VI) is still maintained at 80% after three cycles, indicating that the n-p heterojunction has excellent structural stability. The capture experiment proves that the main active species in the system are electrons. The reasonable mechanism of Bi2WO6/Bi2S3/MoS2 photocatalytic reduction Cr(VI) is proposed. Our work provides new research ideas for the design of ternary heterojunction composites and new strategies for the development of photocatalysts for wastewater treatment.

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Section: Introductionmentioning

confidence: 99%

Spherical Bi2WO6/Bi2S3/MoS2 n-p Heterojunction with Excellent Visible-Light Photocatalytic Reduction Cr(VI) Activity

Ren

Gong

et al. 2020

Nanomaterials

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“…The Z-scheme Co 3 O 4 /Ag/Bi 2 WO 6 was used for the simultaneous photodegradation of Cr(VI) and TC under visible light irradiation, and the system was most efficient due to the full utilization of photogenerated electrons and holes. 150…”

Section: Effect Of Co-pollutants On Tc Removalmentioning

confidence: 99%

A review on tetracycline removal from aqueous systems by advanced treatment techniques

et al. 2020

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“…fabricated a Z‐Scheme Co 3 O 4 /Ag/Bi 2 WO 6 nanocomposite by a multistep synthesis. [ 122 ] Regarding the Ag/Bi 2 WO 6 nanocomposite system, the Fermi level of n‐type Bi 2 WO 6 was higher than that of metal Ag. After the charge redistribution when they came into contact, the equilibrium state would be established.…”

Section: Modulated Strategies Of Bi2wo6‐based Materials With Multifunmentioning

confidence: 99%

“…Additionally, we deeply illustrate and analyze the connections between the morphological, photophysics and photochemical properties of Bi 2 WO 6 , which include dopant or defect structures, metal deposition techniques, semiconductor combinations and surface modification by carbon‐based materials with conjugated π‐structures. [ 39–181 ] We critically review the practical applications of water splitting, pollutant removal, and especially CO 2 reduction. These aspects reflect the research status of Bi 2 WO 6 , as well as its potential and opportunities in the field of clean energy and environmental protection.…”

Section: Introductionmentioning

confidence: 99%

Recent progress in Bi₂WO₆‐Based photocatalysts for clean energy and environmental remediation: Competitiveness, challenges, and future perspectives

et al. 2020

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The efficient utilization of photocatalytic technology is essential for clean energy and environmental remediation. Bismuth tungstate (Bi2WO6), an appealing Aurivillius phase perovskite, has arisen widespread attention as a visible light responsive photocatalyst applied in environment due to its low cost, nontoxicity, modifiable morphology, and outstanding optical and chemical properties. Nevertheless, the photocatalytic activity of pure Bi2WO6 is unsatisfactory because of its relative small specific surface area, poor quantum yield, and the rapid recombination of photogenerated carriers. Therefore, many strategies, namely, morphological control, dopant or defect introduction, metal deposition, semiconductor combination and surface modification by carbon‐based materials with conjugated π‐structures, have been systematically studied to enhance the photocatalytic performance of Bi2WO6 in the past few years. In order to better explore and study the application of bismuth‐based perovskite oxides in the field of photocatalysis, this review summarizes the recent research progress on Bi2WO6‐based photocatalysts. Moreover, in terms of the improved photocatalytic activity of Bi2WO6‐based photocatalysts, three main applications, including water splitting, pollutants removal, and CO2 reduction, are introduced in detail and critically reviewed. Eventually, the prospects, opportunities, and challenges of Bi2WO6‐based photocatalysts are pointed out. This comprehensive review is expected to put forward valuable suggestions for designing of Bi2WO6‐based photocatalysts applied in clean energy production and environmental remediation on the premise of consolidating the existing theoretical basis of photocatalysis.

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Synergistic effects in simultaneous photocatalytic removal of Cr(VI) and tetracycline hydrochloride by Z-scheme Co3O4/Ag/Bi2WO6 heterojunction

Cited by 119 publications

References 51 publications

Spherical Bi2WO6/Bi2S3/MoS2 n-p Heterojunction with Excellent Visible-Light Photocatalytic Reduction Cr(VI) Activity

Spherical Bi2WO6/Bi2S3/MoS2 n-p Heterojunction with Excellent Visible-Light Photocatalytic Reduction Cr(VI) Activity

A review on tetracycline removal from aqueous systems by advanced treatment techniques

Recent progress in Bi₂WO₆‐Based photocatalysts for clean energy and environmental remediation: Competitiveness, challenges, and future perspectives

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Synergistic effects in simultaneous photocatalytic removal of Cr(VI) and tetracycline hydrochloride by Z-scheme Co3O4/Ag/Bi2WO6 heterojunction

Cited by 119 publications

References 51 publications

Spherical Bi2WO6/Bi2S3/MoS2 n-p Heterojunction with Excellent Visible-Light Photocatalytic Reduction Cr(VI) Activity

Spherical Bi2WO6/Bi2S3/MoS2 n-p Heterojunction with Excellent Visible-Light Photocatalytic Reduction Cr(VI) Activity

A review on tetracycline removal from aqueous systems by advanced treatment techniques

Recent progress in Bi2WO6‐Based photocatalysts for clean energy and environmental remediation: Competitiveness, challenges, and future perspectives

Contact Info

Product

Resources

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Recent progress in Bi₂WO₆‐Based photocatalysts for clean energy and environmental remediation: Competitiveness, challenges, and future perspectives