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• W4309581330 endingPage "155717" @default.
• W4309581330 startingPage "155717" @default.
• W4309581330 abstract "Thioether post-modification for covalent aromatic polyimide polymer made it become high active photocatalyst for H 2 O 2 photosynthesis in pure water with a yielding rate of about 2240 μmol·h -1 ·g -1 . • Unique thioether-modification strategy for covalent aromatic polyimides (S-CAPs) • S-CAPs with about 6 times higher photocatalytic activity than original CAPs. • High H 2 O 2 yielding rate over 2240 μmol·h -1 ·g -1 in pure water. • Thioether-modification facilitate the separation of photoexcited electron and hole pairs over CAPs. Hydrogen peroxide is one of the 100 most commonly used chemical reagents. Sunlight-driven two-electron reduction of O 2 (2e - ORR) in pure water was a promising H 2 O 2 photosynthesis route. Some covalent organic polymers (COPs) have been demonstrated as effective sacrificial agent-free photocatalysts for H 2 O 2 photosynthesis, while more COPs are poorly active. In this present work, a simple thioether-modification strategy for covalent aromatic polyimides (CAPs) was developed to obtain high-performance sacrificial agent-free photocatalysts. During solvothermal synthesis of CAP polymers in dimethyl sulfoxide (DMSO) solvent at higher temperature (180 °C), thioether groups resulting from thermal decomposition of DMSO were grafted on dianhydride blocks of CAP polymers (S-CAPs). This enabled less active CAPs to become high active S-CAPs photocatalyst. The H 2 O 2 production rate over the optimized S-CAPs reached 2240 μmol·h -1 ·g -1 without using any additional sacrificial agents, among the best photocatalysts for H 2 O 2 photosynthesis. The thioether groups grafting on S-CAP frameworks were found to efficiently enhance visible light absorption and facilitate the separation of photogenerated electron (-) and hole (+) pairs during photosynthesis. It not only provided an impressive sacrificial agent-free photocatalyst for H 2 O 2 photosynthesis, but also demonstrated a novel post-modification method to gain high-performance COP-based photocatalyst." @default.
• W4309581330 created "2022-11-28" @default.
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• W4309581330 date "2023-02-01" @default.
• W4309581330 modified "2023-10-16" @default.
• W4309581330 title "Thioether-modified covalent aromatic polyimides with enhanced photocatalytic performance for hydrogen peroxide photosynthesis in pure water" @default.
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• W4309581330 doi "https://doi.org/10.1016/j.apsusc.2022.155717" @default.
• W4309581330 hasPublicationYear "2023" @default.
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