Facile Synthesis of Sillén-Aurivillius Layered Oxide Bi7Fe2Ti2O17Cl with Efficient Photocatalytic Performance for Degradation of Tetracycline

The development of an efficient and environment-friendly photocatalyst for antibiotics degradation is of great significance and still remains a major challenge. Herein, a novel Sillén-Aurivillius layered oxide Bi7Fe2Ti2O17Cl is successfully synthesized via a one-step flux route (noted as F-BFTOC) an...

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Bibliographic Details
Published inCatalysts Vol. 12; no. 2; p. 221
Main Authors Gu, Yan, Yu, Fang, Chen, Jikun, Zhang, Qinfang
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.02.2022
Subjects
Antibiotics
Bi7Fe2Ti2O17Cl
Catalysts
Catalytic activity
Chemical reactions
degradation mechanism
Efficiency
Electron paramagnetic resonance
Electron spin
First principles
High performance liquid chromatography
Light
Mass spectrometry
Performance degradation
Photocatalysis
photocatalyst
Photocatalysts
Photodegradation
Pollutants
Rhodamine
Semiconductors
Spectrum analysis
Spin resonance
tetracycline
Water purification
Zinc oxides
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Summary:The development of an efficient and environment-friendly photocatalyst for antibiotics degradation is of great significance and still remains a major challenge. Herein, a novel Sillén-Aurivillius layered oxide Bi7Fe2Ti2O17Cl is successfully synthesized via a one-step flux route (noted as F-BFTOC) and solid-state reaction (noted as S-BFTOC). The as-prepared F-BFTOC manifests the enhanced visible-light photocatalytic performance towards tetracycline (TC) degradation compared with Bi4NbO8Cl and its degradation efficiency reaches 90% within 90 min. Additionally, the proposed degradation pathway and photocatalytic mechanism are systematically investigated by liquid chromatography tandem-mass spectrometry (HPLC-MS), active species trapping test, electron spin resonance (ESR) and first-principles calculations. The superior degradation of antibiotics is primarily derived from the photo-generated h+, and radical ·O2− as the dominant active species. More importantly, the F-BFTOC exhibits excellent cycle stability and TC is ultimately transformed into non-toxic open-loop products. Simultaneously, Rhodamine B (RhB) as a typical organic pollutant is further employed to evaluate the photocatalytic activity of F-BFTOC, and 98% of the degradation efficiency is achieved. BFTOC as a multifunctional photocatalyst for pollutant degradation offers a new insight for Sillén-Aurivillius photocatalytic in the field of water purification.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal12020221