Regulating crystallinity in linear conjugated polymer to boost the internal electric field for remarkable visible-light-driven disinfection

doi:10.1016/j.jmst.2022.08.001

J. Mater. Sci. Technol. ›› 2023, Vol. 137: 26-35.DOI: 10.1016/j.jmst.2022.08.001

• Research Article • Previous Articles Next Articles

Regulating crystallinity in linear conjugated polymer to boost the internal electric field for remarkable visible-light-driven disinfection

Dawei Zhang^a,b,1, Chengling Yang^a,b,1, Hanwen Wang^a, Yukun Yan^a,*, Zhanyong Wang^c, Xiangrong Li^a,d, Yan Liang^a, Jinsong Zhang^a,*, Jun Xiao^a,*

^aShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;
^bSchool of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China;
^cCollege of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang 110866, China;
^dCollege of Light Industry, Liaoning University, Shenyang 110036, China

Received:2022-08-15 Accepted:2022-08-16 Published:2023-02-20 Online:2023-02-15
Contact: *E-mail addresses: ykyan@imr.ac.cn (Y. Yan), jszhang@imr.ac.cn (J. Zhang), jxiao14b@imr.ac.cn (J. Xiao).
About author:¹These authors contributed equally to this work.

Abstract

Abstract: Conjugated linear polymers are promising metal-free photocatalysts for visible-light-driven photocatalytic water disinfection, but it was still bottlenecked by the insufficient photogenerated charge separation and transport (CST) process. Herein, we obtained the highly crystalline imine-linked conjugated linear polymer (ODA-BPAH) with a greatly enhanced CST process. The highly crystalline ODA-BPAH exhibited excellent broad-spectrum water disinfection efficiency up to 99.99999% in 1 h, which is among the reported highest of state-of-the-art photocatalysts. The crystallinity of ODA-BPAH was regulated by simply turning the solvent and the experiment results revealed that the ODA-BPAH with high crystallinity exhibited higher internal electric field strength and photocatalytic performance than that with low crystallinity, which indicates that higher crystallinity in linear conjugated polymers contributes to superior CST efficiency as well as the generation of reactive oxygen species. This work highlights the impact of polymer crystallinity on the internal electric field and proves that linear poly-imine could be a new type of promising metal-free photocatalyst for water treatment.

Key words: Polymeric photocatalysts, Water disinfection, Imine-linked conjugated polymer, High crystallinity, Internal electric field

Dawei Zhang, Chengling Yang, Hanwen Wang, Yukun Yan, Zhanyong Wang, Xiangrong Li, Yan Liang, Jinsong Zhang, Jun Xiao. Regulating crystallinity in linear conjugated polymer to boost the internal electric field for remarkable visible-light-driven disinfection[J]. J. Mater. Sci. Technol., 2023, 137: 26-35.

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Regulating crystallinity in linear conjugated polymer to boost the internal electric field for remarkable visible-light-driven disinfection

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