MoS2 and g-C3N4 nanosheet co-modified Bi2WO6 ternary heterostructure catalysts coupling with H2O2 for improved visible photocatalytic activity

MoS2 and g-C3N4 nanosheet co-modified Bi2WO6 ternary heterostructure catalyst (g-C3N4/MoS2/Bi2WO6) has been synthesized through the hydrothermal and ultrasound method and applied for tetracycline (TC) degradation in synergy with H2O2 under visible light irradiation. The CN/MS/BWO catalysts were anal...

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Bibliographic Details
Published in:Materials chemistry and physics 2021-11, Vol.272, p.124982, Article 124982
Main Authors: Wu, Zengmin, Jin, Chongyue, Li, Zhilin, Yang, Daien, Xie, Yuanhua, Wang, Min
Format: Article
Language:English
Subjects:
Antibiotics
Bi2WO6
Bismuth compounds
Carbon nitride
Catalysts
Catalytic activity
Electromagnetic absorption
H2O2
Heterostructures
Holes (electron deficiencies)
Hydrogen peroxide
Light irradiation
Molybdenum disulfide
Nanosheets
Photocatalysis
Photodegradation
Ternary heterojunction
Tetracycline
Tungstates
Ultrasonic methods
Ultrasonic testing
Visible light
X ray photoelectron spectroscopy
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Summary:MoS2 and g-C3N4 nanosheet co-modified Bi2WO6 ternary heterostructure catalyst (g-C3N4/MoS2/Bi2WO6) has been synthesized through the hydrothermal and ultrasound method and applied for tetracycline (TC) degradation in synergy with H2O2 under visible light irradiation. The CN/MS/BWO catalysts were analyzed by XRD, SEM, HRTEM, PL, FI-IR, XPS and UV–vis DRS. The optimal 3CN/0.5MS/BWO catalyst can degrade 90% of TC for 60 min under visible light with H2O2 (2 mL/L), being 30% higher than that of pure Bi2WO6. Recycling experiments showed that the photocatalysts maintained outstanding stability after five-time recycles. The improved photocatalytic ability of the CN/MS/BWO heterostructure was owing to the increased visible-light absorption and photogenerated electron-hole pairs separation rate. This work explores one high-efficiency photocatalytic degradation process of antibiotics, which will help further research in this field. [Display omitted] •The ternary g-C3N4/MoS2/Bi2WO6 (CN/MS/BWO) heterostructure was successfully synthesized.•H2O2 was a scavenger to expedite the separation of photogenerated charge carriers.•The ·O2− played the most important role in the TC degradation reaction.•The ternary heterostructure increased visible-light absorption and inhibited the electron-hole recombination rate.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2021.124982