A Z-scheme iron-based hollow microsphere with enhanced photocatalytic performance for tetracycline degradation

Photocatalytic oxidation has been considered as a potential method for elimination of organic contaminants with low energy consumption. Photodegradation performance is subject to some factors: bandgap, band-edge positions and carrier separation efficiency. Z-scheme heterojunction system can improve...

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Bibliographic Details
Published inJournal of materials research Vol. 36; no. 7; pp. 1600 - 1613
Main Authors Chen, Cong, Li, Zhihao, Guo, Yuting, Ling, Liwei, Zheng, Yingping, Ren, Lili, Wu, Min
Format Journal Article
LanguageEnglish
Published Cham Springer International Publishing 14.04.2021
Springer Nature B.V
Subjects
Antibiotics
Applied and Technical Physics
Biomaterials
Carbon nitride
Chemistry and Materials Science
Contaminants
Crosslinking
Energy consumption
Ferric oxide
Heterojunctions
Inorganic Chemistry
Materials Engineering
Materials research
Materials Science
Nanotechnology
Oxidation
Performance degradation
Photocatalysis
Photocatalysts
Photodegradation
Separation
Waste management
Catalytic
Environment
Composite
Photochemical
Cost-effective
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Summary:Photocatalytic oxidation has been considered as a potential method for elimination of organic contaminants with low energy consumption. Photodegradation performance is subject to some factors: bandgap, band-edge positions and carrier separation efficiency. Z-scheme heterojunction system can improve photocatalytic performance through optimizing these factors. Thus, a Z-scheme α-Fe 2 O 3 /g-C 3 N 4 hollow microsphere was obtained via controlled crosslinking and hydrolysis process (uniform dispersion of two components: through crosslinking; hollow structure: from self-sacrifice of glucose). Numerous constructed pores are beneficial for tetracycline (TC) to adsorb on photocatalysts (7.9 mg/L), which further accelerates TC degradation process. TC degradation rate increased to 67% over α-Fe 2 O 3 /g-C 3 N 4 -4 (g-C 3 N 4 : 48%, α-Fe 2 O 3 : 44%) after 2 h irradiation, which results from the quick capture and separation of photogenerated electron–hole pairs and the oxidation and reduction abilities of photocatalysts. This work presents an insight into promoting degradation efficiency of antibiotics and simultaneously reducing photocatalyst cost. Graphic Abstract
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ISSN:0884-2914
2044-5326
DOI:10.1557/s43578-021-00208-3