Create a strong internal electric-field on PDI photocatalysts for boosting phenols degradation via preferentially exposing pi-conjugated planes up to 100%

Zhang, Yaning ¹Wang, Dan ¹Liu, Weixu ²Lou, Yang ¹Zhang, Ying ¹Dong, Yuming ¹Xu, Jing ³Pan, Chengsi ¹Zhu, Yongfa¹

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作者信息

1. Jiangnan Univ, Sch Chem & Mat Engn, Key Lab Synthet & Biol Colloids, Minist Educ, Wuxi 214122, Jiangsu, Peoples R China
2. Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China
3. Jiangnan Univ, Sch Food Sci & Technol, Wuxi 214122, Jiangsu, Peoples R China
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Abstract

Nearly 100% exposure of pi-conjugated planes, whose structure inherently exhibits large electron delocalization and fast charge transfer, has been achieved in perylene diimide (PDI) supramolecular photocatalysts by a solvent-induced self-assembly method. The high exposure ratio of pi-conjugated planes is found to cause a larger surface potential and higher surface charge density by experimental data, and higher electron distribution by DFT calculations, relative to pi-stacked planes exposed on PDI nanorods or (020) planes exposed on PDI particles, resulting in a strong internal electric field. This gives pi-conjugated PDI ca. 8-17 times higher activity on phenols photodegradation than reported PDI, and 4-6 times higher activity than well-known photocatalysts like Bi2WO6 or g-C3N4. The successful control of PDI to preferentially expose pi-conjugated planes may not only boost the photocatalytic activity in this system, but also give some guidelines in the design and development of more efficient organic photocatalysts with wide spectrum response.

Key words

PDI/Internal electric field/Facet control/Photocatalyst/Phenol

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出版年

2022

Applied Catalysis

ISSN：0926-3373

被引量34

参考文献量66

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