The synergetic enhancement of piezo catalytic performance to remove tetracycline by K2Ti6O13/TiO2 composite

The synergetic enhancement of piezo catalytic performance to remove tetracycline by K2Ti6O13/TiO2 composite

•The synergetic enhancement of the piezo catalysis of K2Ti6O13/TiO2 nanocomposite.•The enhancement of the piezo catalysis is due to the band gap engineering.•The mechanism of the piezo catalysis is systematically investigated. The K2Ti6O13/TiO2 heterojunction is constructed to improve the piezo cata...

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Bibliographic Details
Published in:Journal of alloys and compounds 2022-04, Vol.900, p.163492, Article 163492
Main Authors: Zhang, Shuo, Liu, Hangxi, Gao, Feixue, Fang, Ming, Zhang, Yifeng, Cai, Yawen, Li, Kexin, Kong, Mingguang, Tan, Xiaoli
Format: Article
Language:eng
Subjects:
Catalysis
Composite
Degradation
Ethylenediaminetetraacetic acids
Free radicals
Heterojunctions
K2Ti6O13
Piezo catalysis
Silver nitrate
Tetracycline
TiO2
Titanium dioxide
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Summary:•The synergetic enhancement of the piezo catalysis of K2Ti6O13/TiO2 nanocomposite.•The enhancement of the piezo catalysis is due to the band gap engineering.•The mechanism of the piezo catalysis is systematically investigated. The K2Ti6O13/TiO2 heterojunction is constructed to improve the piezo catalytic performance of tetracycline. [Display omitted] Piezo catalysis has recently been considered an important technology in environmental treatment. In this study, a type II heterojunction of K2Ti6O13/TiO2 composite is successfully prepared by a hydrothermal method for the highly efficient piezo catalytic degradation of tetracycline. The factors influencing the piezo catalysis of tetracycline are systematically studied and discussed, including pH value, competition of anions/cations, ultrasonic power, ultrasonic frequency, and temperature, etc. Free radical sacrificial agents (EDTA-2Na, DMSO, AgNO3, and P-BQ, etc.) are utilized to better understand the degradation mechanism by piezo catalysis, and holes are found to play a dominant role in the catalytic process, and ·O2- comes the second. The combination of K2Ti6O13 and TiO2 constructs a type II heterojunction of the highly efficient separation of piezo electrons and holes, thus systematically increasing the piezo catalytic performance. This work provides a new idea to degrade organic pollution through piezo catalysis and the potential application of piezo catalysis in environmental treatment.
ISSN:0925-8388
1873-4669