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Research Article

Spherical cationic polymer networks with porphyrin photosensitizer for sustainable and efficient photocatalysis

Lingling Zhang1Liwei Wu1Junhui Bao2Longhui Li1Zejun Liu1Feng Bai1( )Jie Ju1( )Xi Yao1( )
Key Laboratory for Special Functional Materials of Ministry of Education, School of Materials Science and Engineering, Henan University, Kaifeng 475004, China
Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong 999077, China
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Graphical Abstract

Hollow spherical polymer networks packed with porphyrin moieties are prepared. Combining the strong electrostatic attraction to anionic reactants, excellent photo-catalysis and renewable photo-active sites, a new model with continuous and efficient photo-catalytic features is established.

Abstract

The continuous and sustainable photo-activity on micro- or nano-carriers has always been a key stepping stone in the industrialization of photo-catalysis, photo-synthesis, and photo-degradation. Herein, we report a new series of positively charged hollow microspheres carrying porphyrin moieties. Such hollow spheres are formed through crosslinking of well-ordered porous thin laminates, initiated by co-assembly of regular monomers and those decorated with porphyrin moieties. On the surface of an individual sphere, densely distributed positive sites attract anionic reactants. The superficial porphyrin decomposes the accumulated reactants under 1 Sun. After degradation and release of products, the photoactive sites are thereby renewed. We demonstrate that polymer network (1:10) exhibited superior sustainable photocatalytic performance with complete degradation of methyl orange (MO) in 40 min with no observable performance deterioration after six cycles. The established close loop of adsorption–reaction–release cycle makes possible many efficient and continuous photo-catalytic processes.

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12274_2023_6395_MOESM1_ESM.pdf (4.2 MB)
Nano Research
Pages 3934-3941
Cite this article:
Zhang L, Wu L, Bao J, et al. Spherical cationic polymer networks with porphyrin photosensitizer for sustainable and efficient photocatalysis. Nano Research, 2024, 17(5): 3934-3941. https://doi.org/10.1007/s12274-023-6395-2
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Received: 01 November 2023
Revised: 03 December 2023
Accepted: 03 December 2023
Published: 29 December 2023
© Tsinghua University Press 2023
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