Just Accepted
Just Accepted Articles have been posted online after technical editing and typesetting for immediate view. The final edited version with page numbers will appear in the Current Issue soon.
Submit a Manuscript
Improved photocatalytic activity of SrBi2Nb2O9 for the degradation of ciprofloxacin hydrochloride via piezoelectric-enhanced charge transfer
Shanshan Yan, Sihai Sun, Zhiwu Chen*, Xin Wang
https://doi.org/10.1016/j.cjsc.2025.100569
ABSTRACT
Piezo-photocatalysis is an emerging photocatalytic technology in which the piezoelectric electric field drives photogenerated carriers to separate, thereby improving the photocatalytic activity of the catalyst. Herein, solid phase and one-step molten salt processes were used to prepare SrBi2Nb2O9 (SBN) powders with granular and sheet morphologies, respectively. The influence of micromorphology on the piezo-photocatalytic performances of SBN was determined by degrading ciprofloxacin hydrochloride (CIP). SBN nanosheets demonstrated remarkable piezo-photocatalytic performance, achieving a 89.13% CIP degradation rate in 60 min and an apparent rate constant of 34.73×10-3 min-1. This performance was approximately 2.65 times higher than granular SBN and outperformed many recently reported piezo-photocatalysts under similar experimental conditions. Free radical trapping techniques, electron spin resonance spectroscopy and liquid chromatography-mass spectrometry were utilized to study the potential paths and mechanisms of CIP degradation. Piezoresponse force microscopy and finite element simulation showed that the piezo-response of SBN nanosheets was significantly higher than that of granular SBN. SBN nanosheets achieve high degradation efficiency due to their optimized conduction band positions and enhanced piezoelectric effect, facilitated by the two-dimensional nanosheet structures. In this work, it is shown the piezoelectric internal electric field of piezoelectric catalysts can be increased by tuning the catalyst morphology, which points to a possible direction for the production of high-performance piezoelectric catalysts.
- Address: Fuzhou High & New Technology Industrial Zone, Shangjie, Minhou, Fuzhou, Fujian 350108, China
- Tel: (86)-591-63173769, 63173770
- E-mail: cjsc@fjirsm.ac.cn
CN 35–1112/TQ, ISSN 0254–5861 Copyright @ 2022 Chinese Journal of Structural Chemistry-www.Chinese Journal of Structural Chemistry.net. All Rights Reserved 闽ICP备2022002645号-1