Boosted tetracycline and Cr(VI) simultaneous cleanup over Z-Scheme BiPO4/CuBi2O4 p-n heterojunction with 0D/1D trepang-like structure under simulated sunlight irradiation

Lu, Changyu; Wang, Lantao; Yang, Daiqiong; Jin, Zhenhai; Wang, Xin; Xu, Jian‐Xin; Li, Zhida; Shi, Weilong; Guan, Wenxian; Huang, Wei

doi:10.1016/j.jallcom.2022.165849

Cited by 42 publications

(6 citation statements)

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“…Therefore, Bi 2 Sn 2 O 7 /β-Bi 2 O 3 S-scheme heterostructures are activated to produce photogenerated electron–hole pairs under photoexcitation ( eq 6 ), a built-in electric field is formed between the interfaces of the materials and the energy band is bent so that the photoexcited electrons in the CB of Bi 2 Sn 2 O 7 can transfer to the VB of β-Bi 2 O 3 and recombine ( eq 7 ). 113 The heterojunction structure between Bi 2 Sn 2 O 7 and β-Bi 2 O 3 ensures the occurrence of this process. Therefore, Bi 2 Sn 2 O 7 and β-Bi 2 O 3 heterojunction can greatly enhance the efficiency of carrier separation and its catalytic activity, as confirmed by the PL, TPR, and EIS results ( Figure 10 ).…”

Section: Resultsmentioning

confidence: 99%

Self-Assembly of Bi₂Sn₂O₇/β-Bi₂O₃ S-Scheme Heterostructures for Efficient Visible-Light-Driven Photocatalytic Degradation of Tetracycline

et al. 2023

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Fabrication of S-scheme heterojunctions with enhanced redox capability offers an effective approach to address environmental remediation. In this study, high-performance Bi 2 Sn 2 O 7 /β-Bi 2 O 3 S-scheme heterojunction photocatalysts were fabricated via the in situ growth of Bi 2 Sn 2 O 7 on β-Bi 2 O 3 microspheres. The optimized Bi 2 Sn 2 O 7 /β-Bi 2 O 3 (BSO/BO-0.4) degradation efficiency for tetracycline hydrochloride was 95.5%, which was 2.68-fold higher than that of β-Bi 2 O 3 . This improvement originated from higher photoelectron−hole pair separation efficiency, more exposed active sites, excellent redox capacity, and efficient generation of • O 2 − and • OH. Additionally, Bi 2 Sn 2 O 7 / β-Bi 2 O 3 exhibited good stability against photocatalytic degradation, and the degradation efficiency remained >89.7% after five cycles. The photocatalytic mechanism of Bi 2 Sn 2 O 7 /β-Bi 2 O 3 S-scheme heterojunctions was elucidated. In this study, we design and fabricate high-performance heterojunction photocatalysts for environmental remediation using S-scheme photocatalysts.

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Section: Resultsmentioning

confidence: 99%

Self-Assembly of Bi₂Sn₂O₇/β-Bi₂O₃ S-Scheme Heterostructures for Efficient Visible-Light-Driven Photocatalytic Degradation of Tetracycline

et al. 2023

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“…The CB potential ( E CB ) of the n-type semiconductor is 0.1 eV more negative than E fb [ 34 , 35 ], so the E CB value of Bi 5 O 7 I is −0.82 eV. For p-type semiconductor, the VB potential ( E VB ) is 0.1 eV more positive than E fb , and the E VB value of CuS is 1.97 eV [ 36 ]. On account of E CB = E VB − E g , the E VB value of Bi 5 O 7 I and the E CB value of CuS are 1.74 and 0.14 eV, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…(vs. NHE), respectively. On account of the p-type nature of CuS and the n-type nature of Bi 5 O 7 I, the E F level of CuS is close to VB, while the E F level of Bi 5 O 7 I is near CB [ 36 , 46 ]. According to Figure 9 a, the E F level of Bi 5 O 7 I is higher than that of CuS.…”

Section: Resultsmentioning

confidence: 99%

“…According to Figure 9 a, the E F level of Bi 5 O 7 I is higher than that of CuS. When Bi 5 O 7 I was combined with CuS, the electrons migrated from Bi 5 O 7 I with a higher E F to CuS with a smaller E F , resulting in the formation of IEF [ 36 , 47 ], which can be seen in Figure 9 b. The IEF can cause the accumulation or depletion of free charge carriers near the surface and result in the foundation of a well-developed heterojunction interface.…”

Section: Resultsmentioning

confidence: 99%

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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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“…The current mainstream methods for water purification include chemical air flotation, advanced oxidation, photocatalytic degradation, adsorption, and microbial treatment [ 4 , 5 , 6 ]. However, traditional treatment methods, such as chemical, physical, and biological methods, have some limitations, such as easily causing secondary pollution, incomplete degradation, and toxicity for microorganisms [ 7 , 8 , 9 ]. Photocatalytic technology is an advanced oxidation technology with low energy consumption, high reaction efficiency, and no secondary pollution [ 10 , 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Rational Design of Monolithic g-C3N4 with Floating Network Porous-like Sponge Monolithic Structure for Boosting Photocatalytic Degradation of Tetracycline under Simulated and Natural Sunlight Illumination

et al. 2023

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In order to solve the problems of powder g-C3N4 catalysts being difficult to recycle and prone to secondary pollution, floating network porous-like sponge monolithic structure g-C3N4 (FSCN) was prepared with a one-step thermal condensation method using melamine sponge, urea, and melamine as raw materials. The phase composition, morphology, size, and chemical elements of the FSCN were studied using XRD, SEM, XPS, and UV–visible spectrophotometry. Under simulated sunlight, the removal rate for 40 mg·L−1 tetracycline (TC) by FSCN reached 76%, which was 1.2 times that of powder g-C3N4. Under natural sunlight illumination, the TC removal rate of FSCN was 70.4%, which was only 5.6% lower than that of a xenon lamp. In addition, after three repeated uses, the removal rates of the FSCN and powder g-C3N4 samples decreased by 1.7% and 2.9%, respectively, indicating that FSCN had better stability and reusability. The excellent photocatalytic activity of FSCN benefits from its three-dimensional-network sponge-like structure and outstanding light absorption properties. Finally, a possible degradation mechanism for the FSCN photocatalyst was proposed. This photocatalyst can be used as a floating catalyst for the treatment of antibiotics and other types of water pollution, providing ideas for the photocatalytic degradation of pollutants in practical applications.

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Boosted tetracycline and Cr(VI) simultaneous cleanup over Z-Scheme BiPO4/CuBi2O4 p-n heterojunction with 0D/1D trepang-like structure under simulated sunlight irradiation

Cited by 42 publications

References 82 publications

Self-Assembly of Bi₂Sn₂O₇/β-Bi₂O₃ S-Scheme Heterostructures for Efficient Visible-Light-Driven Photocatalytic Degradation of Tetracycline

Self-Assembly of Bi₂Sn₂O₇/β-Bi₂O₃ S-Scheme Heterostructures for Efficient Visible-Light-Driven Photocatalytic Degradation of Tetracycline

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

Rational Design of Monolithic g-C3N4 with Floating Network Porous-like Sponge Monolithic Structure for Boosting Photocatalytic Degradation of Tetracycline under Simulated and Natural Sunlight Illumination

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Boosted tetracycline and Cr(VI) simultaneous cleanup over Z-Scheme BiPO4/CuBi2O4 p-n heterojunction with 0D/1D trepang-like structure under simulated sunlight irradiation

Cited by 42 publications

References 82 publications

Self-Assembly of Bi2Sn2O7/β-Bi2O3 S-Scheme Heterostructures for Efficient Visible-Light-Driven Photocatalytic Degradation of Tetracycline

Self-Assembly of Bi2Sn2O7/β-Bi2O3 S-Scheme Heterostructures for Efficient Visible-Light-Driven Photocatalytic Degradation of Tetracycline

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

Rational Design of Monolithic g-C3N4 with Floating Network Porous-like Sponge Monolithic Structure for Boosting Photocatalytic Degradation of Tetracycline under Simulated and Natural Sunlight Illumination

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Self-Assembly of Bi₂Sn₂O₇/β-Bi₂O₃ S-Scheme Heterostructures for Efficient Visible-Light-Driven Photocatalytic Degradation of Tetracycline

Self-Assembly of Bi₂Sn₂O₇/β-Bi₂O₃ S-Scheme Heterostructures for Efficient Visible-Light-Driven Photocatalytic Degradation of Tetracycline