Construction of magnetically separable hierarchical Z-scheme NiFe2O4@Bi2Sn2O7 heterojunction with enhanced visible-light photocatalytic activity

The magnetic photocatalysts play an important role in practical application. Herein, a novel magnetic hierarchical Z-scheme NiFe 2 O 4 @Bi 2 Sn 2 O 7 heterojunction photocatalyst was fabricated by hydrothermal strategy. The structure, micromorphology and physical properties of the as-prepared produc...

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Published inJournal of materials research Vol. 36; no. 16; pp. 3366 - 3379
Main Authors Wu, Chenyan, Huang, Feilong, Shen, Qianhong, Yu, LiXin, Zhang, Changteng, Sheng, Jiansong, Cheng, Di, Yang, Hui
Format Journal Article
LanguageEnglish
Published Cham Springer International Publishing 28.08.2021
Springer Nature B.V
Subjects
Applied and Technical Physics
Biomaterials
Carrier lifetime
Catalytic activity
Chemistry and Materials Science
Composite materials
Heterojunctions
Heterostructures
Inorganic Chemistry
Light irradiation
Magnetic properties
Materials Engineering
Materials research
Materials Science
Nanoparticles
Nanotechnology
Nickel ferrites
Photocatalysis
Photocatalysts
Photodegradation
Physical properties
Structural stability
Heterostructure
Hierarchical
Catalytic
Magnetic
Photochemical
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Summary:The magnetic photocatalysts play an important role in practical application. Herein, a novel magnetic hierarchical Z-scheme NiFe 2 O 4 @Bi 2 Sn 2 O 7 heterojunction photocatalyst was fabricated by hydrothermal strategy. The structure, micromorphology and physical properties of the as-prepared products were analysed, and the photocatalytic performance was carried out via photocatalytic degradation of tetracycline hydrochloride under visible-light irradiation. The longest average carrier lifetime of the NiFe 2 O 4 @Bi 2 Sn 2 O 7 composite is about 2.9 times longer than that of pure Bi 2 Sn 2 O 7 (2.45 ns), thereby achieving the enhanced photocatalytic activity. After a four-cycle photocatalytic degradation reaction, the NiFe 2 O 4 @Bi 2 Sn 2 O 7 composite still exhibits excellent photocatalytic activity and structural stability due to its magnetic property, and this feature is conducive to its practical application. The results demonstrate that NiFe 2 O 4 nanoparticles are uniformly loaded on flower-like hierarchical Bi 2 Sn 2 O 7 , and thus not only forming nanosized Z-scheme NiFe 2 O 4 @Bi 2 Sn 2 O 7 heterostructure, but also making the composite material magnetic. This work provided new perspectives about construction of heterojunction photocatalysts. Graphic Abstract
ISSN:0884-2914
2044-5326
DOI:10.1557/s43578-021-00369-1