Micro-/nanostructured ZnFe2O4 hollow sphere/GO composite for structurally enhanced photocatalysis performance

The pollution of organic dyes has become a serious environmental problem. It is still urgent to prepare a highly efficient and environment-friendly photocatalyst for pollutants removal. Herein, a micro-/nanostructured ZnFe 2 O 4 hollow sphere/GO (ZnFe 2 O 4 /GO) composite photocatalyst was prepared...

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Bibliographic Details
Published in:Rare metals 2023-03, Vol.42 (3), p.813-821
Main Authors: Zhao, Yang-Yang, Wang, Xian-Biao, Xu, Qian-Kun, Chakir, Soufian, Xu, Yong-Fei, Xu, Bao, Hu, Yong-Hua
Format: Article
Language:English
Subjects:
Biomaterials
Catalytic activity
Chemistry and Materials Science
Energy
Graphene
Letter
Light irradiation
Materials Engineering
Materials Science
Metallic Materials
Nanoparticles
Nanoscale Science and Technology
Nanospheres
Nanostructure
Photocatalysis
Photocatalysts
Physical Chemistry
Self-assembly
Wastewater treatment
Zinc ferrites
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Summary:The pollution of organic dyes has become a serious environmental problem. It is still urgent to prepare a highly efficient and environment-friendly photocatalyst for pollutants removal. Herein, a micro-/nanostructured ZnFe 2 O 4 hollow sphere/GO (ZnFe 2 O 4 /GO) composite photocatalyst was prepared through a one-step hydrothermal method with high performance and recycling property. The obtained micro-/nanostructured composite was assembled by ZnFe 2 O 4 hollow spheres and GO nanosheets. The special self-assembled hollow nanosphere structure enlarged visible light harvesting. In addition, luminescence property demonstrates that the introduction of graphene oxide (GO) inhibits the recombination of electron–hole pairs, leading to enhancement of photocatalytic activity of ZnFe 2 O 4 . Under visible light irradiation, the ZnFe 2 O 4 /GO composite exhibited excellent photocatalytic activity for Congo red (93%), higher than that of the pure ZnFe 2 O 4 hollow spheres (only 60%) and commercial ZnFe 2 O 4 nanoparticles (40%). Moreover, the micro-/nanostructured ZnFe 2 O 4 /GO composite photocatalyst can be regenerated with high efficiency and remains over 80% activity after seven regenerations. This work not only supplies a new strategy for one-step preparation of such ZnFe 2 O 4 /GO micro-/nanostructures for structurally enhanced photocatalysis, but also provides a highly efficient photocatalyst for wastewater treatment. Graphical abstract
ISSN:1001-0521
1867-7185
DOI:10.1007/s12598-022-02200-0