Citation: Hua Lei, Meixuan Wu, Ying Liu, Fan Mo, Jiayao Chen, Shilong Ji, Yan Zou, Xiaoping Dong. Built-in piezoelectric field improved photocatalytic performance of nanoflower-like Bi₂WO₆ using low-power white LEDs[J]. Chinese Chemical Letters, ;2021, 32(7): 2317-2321. doi: 10.1016/j.cclet.2020.12.019 shu

Built-in piezoelectric field improved photocatalytic performance of nanoflower-like Bi₂WO₆ using low-power white LEDs

Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Xiasha Higher Education Zone, Hangzhou 310018, China

xpdong@zstu.edu.cn

Received Date: 25 September 2020
Revised Date: 16 November 2020
Accepted Date: 10 December 2020
Available Online: 16 December 2020

Figures(4)

Photocatalysis technology has been proved to be a potential strategy for removal of organic dyes, however high-power light sources are generally necessary to initiate photocatalytic reaction. In this work, we employed an excellent photocatalyst of Bi₂WO₆ with visible light harvest and meanwhile an intrinsic ferroelectricity, which realized the efficient degradation of organic dye via the synergetic photopiezocatalysis. Through coupling the illumination by a low-power (9 W) LED and the ultrasonic vibration (120 W) by an ultrasonic cleaner, the nanoflower-like Bi₂WO₆ composed of ultrathin nanosheets showed a much more enhanced photopiezocatalysis performance for purification of organic dye than the individual photocatalysis and piezocatalysis. Furthermore, the high mineralization efficiency and the good durability of the Bi₂WO₆ catalyst were demonstrated. The possible mechanism of photopiezocatalysis was finally proposed, where the ultrasound-induced piezoelectric field in Bi₂WO₆ drove photo-generated electrons and holes to diffuse along opposite directions, consequently promoting the separation efficiency of charge carriers. This work indicates that the synergetic photopiezocatalysis by coupling irradiation and ultrasonic vibration is a promising strategy to purify organic pollutants in wastewater.
- Photopiezocatalysis,
- LED illumination,
- Ultrasonic vibration,
- Piezoelectric effect,
- Dye degradation
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Built-in piezoelectric field improved photocatalytic performance of nanoflower-like Bi2WO6 using low-power white LEDs

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通讯作者: 陈斌, bchen63@163.com

Built-in piezoelectric field improved photocatalytic performance of nanoflower-like Bi₂WO₆ using low-power white LEDs