A yolk–shell Bi@void@SnO2 photocatalyst with enhanced tetracycline degradation

The yolk–shell Bi@void@SnO 2 photocatalyst was synthesized via a step-by-step process. The composition, morphology, optical and photoelectrochemical properties as well as the surface chemical composition and states of the samples were characterized by X-ray diffraction, transmission electron microsc...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2019-08, Vol.30 (16), p.14987-14994
Main Authors: Wu, Xiang-Feng, Wang, Yi-Jin, Song, Lian-Jun, Su, Jun-Zhang, Zhang, Jia-Rui, Jia, Yun-Ning, Shang, Jia-Lu, Nian, Xiao-Wei, Zhang, Chen-Yu, Sun, Xiu-Guo
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemical composition
Chemistry and Materials Science
Composite materials
Electromagnetic absorption
Light irradiation
Materials Science
Morphology
Optical and Electronic Materials
Optical properties
Organic chemistry
Photocatalysis
Photocatalysts
Photodegradation
Photoelectrons
Reflectance
Synthesis
Tin dioxide
Transmission electron microscopy
X-ray diffraction
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Summary:The yolk–shell Bi@void@SnO 2 photocatalyst was synthesized via a step-by-step process. The composition, morphology, optical and photoelectrochemical properties as well as the surface chemical composition and states of the samples were characterized by X-ray diffraction, transmission electron microscopy, UV–Vis diffuse reflectance spectra, electrochemical impedance spectra and X-ray photoelectron spectrometer, respectively. The tetracycline has been used to evaluate the photocatalytic activities of the as-synthesized samples. Compared with the degradation efficiency of 16.33% for pure Bi and almost nothing for SnO 2 under visible light irradiation, the as-developed Bi@void@SnO 2 photocatalyst possesses 81.81% of degradation efficiency. Meanwhile, the light absorption of the as-developed yolk–shell composites is broadened from ultraviolet to visible light comparing to pure SnO 2 due to the surface plasmon resonance effect of Bi spheres. Moreover, the superoxide radicals, especially in holes, play leading roles during the photocatalytic degradation process. In addition, the decomposition mechanism of the as-fabricated composites for tetracycline is analyzed in detail.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-019-01871-3