Novel oxygen vacancy-rich Bi2MoO6-SOVs/MgFe2O4 S-scheme heterojunction piezo-photocatalytic for efficient degradation of norfloxacin and theoretical calculations

Wei, Hainan; Meng, Fanming; Zhang, Han; Yu, Wenqing; Li, Jialong; Yao, Sheng

doi:10.1016/j.cej.2023.147738

Cited by 33 publications

(2 citation statements)

References 71 publications

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“…It is already established that the norfloxacin antibiotic is photocatalytically degraded by the oxidation process in an aqueous medium. − The free radicals and holes trapping tests provide more insight into the photocatalytic mechanism of norfloxacin degradation in aqueous solution using RGO–SnSe catalysts. The role of different oxidative species was studied by using 2-propanol (OH · scavenger), EDTA-Na 2 (h + , hole scavenger), and purging N 2 gas (O 2 –· scavenger). − The temporal photodegradation and degradation efficiency of RGO–SnSe composite for different scavengers are graphically represented in Figure S6A,B in SI, respectively.…”

Section: Resultsmentioning

confidence: 99%

Reduced Graphene Oxide–SnSe Nanocomposite Photocatalyst with High Apparent Quantum Yield for the Photodegradation of Norfloxacin

Kar,

Pal,

Ghosh

2024

ACS Appl. Nano Mater.

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A visible-light-responsive photocatalyst, comprising reduced graphene oxide (RGO) modified tin selenide (SnSe), was fabricated via a cost-effective, one-pot, easy-to-achieve, single-step solvothermal method. The Brunauer−Emmett−Teller analysis shows SnSe with a specific surface area of about 0.3 m 2 g −1 , while RGO−SnSe significantly increases it to 8.44 m 2 g −1 . The photocatalytic kinetics of the RGO−SnSe composite revealed a pseudo-first-order reaction mechanism during the degradation of norfloxacin antibiotics in an aqueous environment. Results indicated that an increase in RGO content in the composites led to enhanced degradation efficiency and apparent quantum yield, reaching maximum values of 90.7 and 11.37%, respectively, at a specific RGO loading of 37 wt %. These values were found to be 3.6 times higher than pure SnSe. However, further augmentation of RGO resulted in a decline in both efficiency and yield. The enhanced catalytic performance can be attributed to the improved synergy between RGO and SnSe. The electrical energy per order was calculated to assess the energy efficiency of the photocatalytic degradation process, yielding a low value of 6.7 kW h m −3 /order for the RGO−SnSe composite with a loading of 0.75 mg/L RGO−SnSe catalyst. The photocatalytic activity of the composite remained nearly unchanged for at least four repeated cycles without any degradation of the catalyst. This outcome underscores the efficacy of the RGO−SnSe composite as an efficient and sustainable technique for antibiotic degradation with a high apparent quantum yield and low energy consumption.

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Section: Resultsmentioning

confidence: 99%

Reduced Graphene Oxide–SnSe Nanocomposite Photocatalyst with High Apparent Quantum Yield for the Photodegradation of Norfloxacin

Kar,

Pal,

Ghosh

2024

ACS Appl. Nano Mater.

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“…In recent years, external stress induced by ultrasound to promote the piezoelectric effects, which can suppress the charge recombination, on the materials has enormously gained scientific interest . This phenomenon frequently originated from noncentrosymmetric structures of the materials, in which polarizing materials’ surfaces can boost the strength of piezoelectricity . A previous study showed that S-scheme g-C 3 N 4 /V 2 O 5 enhanced the removal of tetracycline under simultaneous irradiation of light and ultrasound .…”

Section: Introductionmentioning

confidence: 99%

Simultaneously Utilizing Excited Holes and Electrons for Piezoelectric-Enhanced Photoproduction of H₂O₂ from S-Scheme 2D S-Doped VO_x/g-C₃N₄ Nanostructures

Phuoc Toan,

Nguyen,

Phan

et al. 2024

ACS Appl. Mater. Interfaces

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2D/2D step-scheme (S-scheme) piezo-photocatalysts for the production of fine chemicals, such as hydrogen peroxide (H2O2), have attracted significant attention of global scientists owing to the efficiency in utilizing surface piezoelectric effects from 2D materials to overcome rapid charge recombination in photocatalytic processes. In this research, we reported the fabrication of 2D S-doped VO x deposited on 2D g-C3N4 to produce H2O2 via the piezo-photocatalytic process with high production yields at 20.19 mmol g–1 h–1, which was 1.75 and 4.87 times higher than that from solely piezo-catalytic and photocatalytic H2O2 generation. The finding pointed out that adding sulfur (S) to VO x can help to improve the catalytic outcomes by modifying the electronic properties of pristine VO x . In addition, when coupled with g-C3N4, the presence of S limits the formation of graphene in the VO x /g-C3N4 composites, causing shielding effects and pushing the cascade reactions toward water generation in the materials. Besides, the research also sheds light on the charge transport between g-C3N4 and S-VO x under irradiation and how the composites work to trigger the formation of H2O2. The presence of S in the composite systems enhances charge transfer between two semiconductors by strengthening the internal electric fields (IEF) to drive electrons moving in one direction, as demonstrated by density functional theory (DFT) calculations. Moreover, the formation of H2O2 significantly relies on the reduction of oxygen to generate oxygenic radical species at the g-C3N4 sites. Meanwhile, S-VO x provides oxidative sites in the composites to oxidize water molecules to directly or indirectly generate H2O2 or O2, which will further participate in the reactions to produce the final products. This study confirms the validation of S-scheme piezo-photocatalysts, thus encouraging further research on developing heterojunction materials with high catalytic efficiency, which can be used in practical conditions.

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Fabrication of a dual Z-scheme Ag3PO4/g-C3N4/Bi2MoO6 ternary nanocomposite for effective degradation of methylene blue dye

Chauhan,

Khan,

Sudhaik

et al. 2024

J Sol-Gel Sci Technol

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Novel oxygen vacancy-rich Bi2MoO6-SOVs/MgFe2O4 S-scheme heterojunction piezo-photocatalytic for efficient degradation of norfloxacin and theoretical calculations

Cited by 33 publications

References 71 publications

Reduced Graphene Oxide–SnSe Nanocomposite Photocatalyst with High Apparent Quantum Yield for the Photodegradation of Norfloxacin

Reduced Graphene Oxide–SnSe Nanocomposite Photocatalyst with High Apparent Quantum Yield for the Photodegradation of Norfloxacin

Simultaneously Utilizing Excited Holes and Electrons for Piezoelectric-Enhanced Photoproduction of H₂O₂ from S-Scheme 2D S-Doped VO_x/g-C₃N₄ Nanostructures

Fabrication of a dual Z-scheme Ag3PO4/g-C3N4/Bi2MoO6 ternary nanocomposite for effective degradation of methylene blue dye

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Novel oxygen vacancy-rich Bi2MoO6-SOVs/MgFe2O4 S-scheme heterojunction piezo-photocatalytic for efficient degradation of norfloxacin and theoretical calculations

Cited by 33 publications

References 71 publications

Reduced Graphene Oxide–SnSe Nanocomposite Photocatalyst with High Apparent Quantum Yield for the Photodegradation of Norfloxacin

Reduced Graphene Oxide–SnSe Nanocomposite Photocatalyst with High Apparent Quantum Yield for the Photodegradation of Norfloxacin

Simultaneously Utilizing Excited Holes and Electrons for Piezoelectric-Enhanced Photoproduction of H2O2 from S-Scheme 2D S-Doped VOx/g-C3N4 Nanostructures

Fabrication of a dual Z-scheme Ag3PO4/g-C3N4/Bi2MoO6 ternary nanocomposite for effective degradation of methylene blue dye

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Simultaneously Utilizing Excited Holes and Electrons for Piezoelectric-Enhanced Photoproduction of H₂O₂ from S-Scheme 2D S-Doped VO_x/g-C₃N₄ Nanostructures