CuBi2O4 and rGO co-modified 3D hierarchical flower-like Bi5O7I nanoflakes as Z-scheme heterojunction for enhanced photocatalytic performance

Xu, Chengyang; Yan, Keding; Wang, Peiying; Zhou, X. H.; Zhang, Tongtong; Fu, Yiwen; Yan, Qishe

doi:10.1016/j.seppur.2020.117935

Cited by 53 publications

(9 citation statements)

References 55 publications

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“…In Figure S1 (see Supplementary Materials ), the co-existence of Bi, O, I, Cu, and S elements can be detected in the survey spectra. In the Bi 4f high-resolution XPS spectrum in Figure 2 b, two peaks at 159.6 and 164.9 eV are in line with the typical binding energies of Bi 4f 7/2 and Bi 4f 5/2 , respectively [ 29 ]. In Figure 2 c, two symmetric peaks were created by fitting the asymmetric O 1s XPS spectrum.…”

Section: Resultsmentioning

confidence: 79%

Construction of S-Scheme CuS/Bi5O7I Heterojunction for Boosted Photocatalytic Disinfection with Visible Light Exposure

Guo

Zhang

et al. 2023

Molecules

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In this paper, a novel S-scheme CuS/Bi5O7I heterojunction was successfully constructed using a two-step approach comprising the alkaline hydrothermal method and the adsorption–deposition method, and it consisted of Bi5O7I microrods with CuS particles covering the surface. The photocatalytic antibacterial effects on Escherichia coli (E. coli) were systematically examined with visible light exposure. The results suggested that the 3%-CuS/Bi5O7I composite showed the optimal antibacterial activity, completely inactivating E. coli (5 × 108 cfu/mL) in 180 min of irradiation. Moreover, the bacterial inactivation process was scientifically described. •O2− and h+ were the major active species for the inactivation of the bacteria. In the early stages, SOD and CAT initiated the protection system to avoid the oxidative destruction of the active species. Unfortunately, the antioxidant protection system was overwhelmed thereafter, which led to the destruction of the cell membrane, as evidenced by the microstructure changes in E. coli cells. Subsequently, the leakage of intracellular components including K+, proteins, and DNA resulted in the unavoidable death of E. coli. Due to the construction of the S-scheme heterojunction, the CuS/Bi5O7I composite displayed the boosted visible light harvesting, the high-efficiency separation of photogenerated electrons and holes, and a great redox capacity, contributing to an outstanding photocatalytic disinfection performance. This work offers a new opportunity for S-scheme Bi5O7I-based heterojunctions with potential application in water disinfection.

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Section: Resultsmentioning

confidence: 79%

Construction of S-Scheme CuS/Bi5O7I Heterojunction for Boosted Photocatalytic Disinfection with Visible Light Exposure

Guo

Zhang

et al. 2023

Molecules

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“…For example, Ag 3 PO 4 /C 3 N 5 , MgIn 2 S 4 /UiO-66-NH 2 , Ag 2 MoO 4 /ZnWO 4 , AgI/Bi 4 V 2 O 11 , Co 3 O 4 /TiO 2 , WO 2.72 /ZnIn 2 S 4 , SnIn 4 S 8 /CeO 2 , CuBi 2 O 4 /WO 3 , and CuBi 2 O 4 /MnO 2 have been reported, and degradation experiments revealed that these constructed Z-scheme systems exhibited desired photocatalytic activities to degrade the organic pollutants in a simulated water environment under light irradiation. Among these Z-scheme systems, CuBi 2 O 4 -based Z-scheme systems have received increasing attention from researchers owing to the negative conduction band (CB) potential and narrow band gap of CuBi 2 O 4 . , In CuBi 2 O 4 -based Z-scheme systems, the negative CB potential endows hybrid systems with a strong reducing ability to react with dissolved oxygen to easily produce • O 2 – . Furthermore, the narrow band gap of CuBi 2 O 4 considerably enhances its ability to harvest irradiated light, consequently improving the concentration of the charge pairs produced.…”

Section: Introductionmentioning

confidence: 99%

Oxygen Vacancy-Mediated CuWO₄/CuBi₂O₄ Samples with Efficient Charge Transfer for Enhanced Catalytic Activity toward Photodegradation of Pharmacologically Active Compounds

Chen,

Zhang,

Wang

et al. 2023

Langmuir

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“…In addition, the high recombination rate of photogenerated electrons and holes hinders the treatment of highly concentrated industrial wastewater. Therefore, the development of new forms of visible light-driven photocatalysis for expanding the response range to a much wider wavelength or promoting the effective separation of photoinduced charge carriers is considered to be a promising method of degrading pollutant in wastewater (Xu et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Novel preparation of stable and highly photocatalytic Z-scheme Cs3PW12O40/Ag3PO4 photocatalysts for the photocatalytic degradation of organic contaminants in water

Duan

et al. 2022

Water Science and Technology

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The Cs3PW12O40/Ag3PO4 (CsPW/Ag3PO4) heterojunction photocatalyst in this study was prepared using a simple chemical precipitation method. Spherical CsPW particles were successfully deposited on Ag3PO4 nanocrystals, all the as-prepared samples are characterized by X-ray diffraction pattern (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), UV visible spectroscopy (UV-Vis), and X-ray photoelectron spectroscopy (XPS). The catalyst activity in relation to rhodamine B (RhB) degradation was evaluated under visible light (λ > 420 nm). The CsPW/Ag3PO4 heterojunction photocatalyst can effectively degrade RhB. The Z-scheme 3% CsPW/Ag3PO4 heterojunction photocatalyst has a higher photocatalytic ability compared with the single-component photocatalyst CsPW or Ag3PO4. The comparatively high photocatalytic performance can be attributed to the high matching of the energy band position and close interface contact, suggesting an enhanced separation efficiency of the photoinduced carriers of the CsPW/Ag3PO4 heterojunction photocatalyst. The reactive species trapping experiments demonstrated photogenerated holes (h+) and superoxide radicals to be the main active components of photocatalytic degradation. A possible photocatalytic mechanism is subsequently proposed.

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CuBi2O4 and rGO co-modified 3D hierarchical flower-like Bi5O7I nanoflakes as Z-scheme heterojunction for enhanced photocatalytic performance

Cited by 53 publications

References 55 publications

Construction of S-Scheme CuS/Bi5O7I Heterojunction for Boosted Photocatalytic Disinfection with Visible Light Exposure

Construction of S-Scheme CuS/Bi5O7I Heterojunction for Boosted Photocatalytic Disinfection with Visible Light Exposure

Oxygen Vacancy-Mediated CuWO₄/CuBi₂O₄ Samples with Efficient Charge Transfer for Enhanced Catalytic Activity toward Photodegradation of Pharmacologically Active Compounds

Novel preparation of stable and highly photocatalytic Z-scheme Cs3PW12O40/Ag3PO4 photocatalysts for the photocatalytic degradation of organic contaminants in water

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CuBi2O4 and rGO co-modified 3D hierarchical flower-like Bi5O7I nanoflakes as Z-scheme heterojunction for enhanced photocatalytic performance

Cited by 53 publications

References 55 publications

Construction of S-Scheme CuS/Bi5O7I Heterojunction for Boosted Photocatalytic Disinfection with Visible Light Exposure

Construction of S-Scheme CuS/Bi5O7I Heterojunction for Boosted Photocatalytic Disinfection with Visible Light Exposure

Oxygen Vacancy-Mediated CuWO4/CuBi2O4 Samples with Efficient Charge Transfer for Enhanced Catalytic Activity toward Photodegradation of Pharmacologically Active Compounds

Novel preparation of stable and highly photocatalytic Z-scheme Cs3PW12O40/Ag3PO4 photocatalysts for the photocatalytic degradation of organic contaminants in water

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Oxygen Vacancy-Mediated CuWO₄/CuBi₂O₄ Samples with Efficient Charge Transfer for Enhanced Catalytic Activity toward Photodegradation of Pharmacologically Active Compounds