Hollow cubic Cu2-xS/Fe-POMs/AgVO3 dual Z-scheme heterojunctions with wide-spectrum response and enhanced photothermal and photocatalytic-fenton performance

[Display omitted] •Cu2-xS/Fe-POMs/AgVO3 dual Z-scheme heterojunction is fabricated.•It has wide spectrum response and photothermal effect.•It shows excellent photocatalytic-Fenton degradation performance.•It is due to synergy of SPR effect, photo-Fenton, and dual Z-scheme heterojunction.•Hollow stru...

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Bibliographic Details
Published in:Applied catalysis. B, Environmental Environmental, 2021-12, Vol.298, p.120628, Article 120628
Main Authors: Qiu, Yalu, Xing, Zipeng, Guo, Meijun, Li, Zhenzi, Wang, Nan, Zhou, Wei
Format: Article
Language:English
Subjects:
Bisphenol A
Heterojunctions
Heterostructures
Hollow structure
Light reflection
Photocatalysis
Photocatalysts
Photocatalytic-Fenton
Photodegradation
Photoresponse
Photothermal effect
Polyoxometallates
Recombination
Superstructures
Surface plasmon resonance
Z-scheme
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Summary:[Display omitted] •Cu2-xS/Fe-POMs/AgVO3 dual Z-scheme heterojunction is fabricated.•It has wide spectrum response and photothermal effect.•It shows excellent photocatalytic-Fenton degradation performance.•It is due to synergy of SPR effect, photo-Fenton, and dual Z-scheme heterojunction.•Hollow structure has multiple light reflection paths and light collection capability. The assembly photocatalyst with rational design of nanostructure can effectually inhibit the rapid charge recombination and improve the photocatalytic performance. Herein, a hollow cubic Cu2-xS/Fe-polyoxometalate/AgVO3 (Cu2-xS/Fe-POMs/AgVO3) dual Z-scheme heterojunction superstructure is constructed on the surface of a hollow cubic Cu2-xS with a clear structure by continuous growth deposition. The hollow cube structure can promote the utilization of light through the refraction and reflection of light in the cavity. Fe-POMs act as the linker between Cu2-xS and AgVO3, providing adequate active sites. In addition, due to the surface plasmon resonance effect of Cu2-xS, Cu2-xS/Fe-POMs/AgVO3 has an obvious photothermal effect, which extends the photoresponse to near-infrared region. The hollow cubic Cu2-xS/Fe-POMs/AgVO3 photocatalyst has excellent photocatalytic-Fenton degradation rate of 98.6 % for bisphenol A within 150 min due to the formation of dual Z-scheme heterostructures benefiting spatial charge separation. This work provides new insights for fabricating superstructure photocatalyst with high-performance and broad-spectrum response.
ISSN:0926-3373
1873-3883
DOI:10.1016/j.apcatb.2021.120628