Polyimide with enhanced pi stacking for efficient visible-light-driven photocatalysis

Zhang Kelian; Li Hanmei; Shi HaixianHong Wei

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Polyimide with enhanced pi stacking for efficient visible-light-driven photocatalysis

机译：聚酰亚胺与增强π堆垛效率visible-light-driven光催化

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Polyimide organic semiconductors have received considerable attention as chemically stable donor-acceptor photocatalysts, yet exhibit moderate photocatalytic efficiency which is limited by low surface area, insufficient light harvesting capability, and rapid recombination of photo-excited charge carriers. Herein, we develop a polyimide-based photocatalyst with a significantly enhanced pi stacking structure which is obtained from solvothermal condensation of pyromellitic dianhydride and N,N-diethylmelamine. The ordered pi stacking leads to extended light absorption ranges via effective intermolecular pi-pi interactions, resulting in a high hydrogen evolution rate of 2516 mu mol g(-1) h(-1) with an apparent quantum efficiency of 11% at 420 nm, as well as significantly boosted photocatalytic degradation and H2O2 synthesis activities.

机译：聚酰亚胺有机半导体已经收到相当大的关注的化学稳定性亲水催化剂,但展览温和的光催化效率受限于表面积低、光线不足收获能力,快速重组photo-excited运营商收费。一个polyimide-based与一个光催化剂显著增强π堆垛结构这是来自solvothermal凝结苯四甲酸二酐和N, N-diethylmelamine。导致通过扩展光吸收范围有效的介子相互作用,分子间导致高氢进化的速度2516亩摩尔g (1) h(1)具有明显的量子效率的11%在420 nm,以及大大提高了光催化降解和过氧化氢合成活动。

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来源
《Catalysis science & technology》 |2021年第14期|4889-4897|共9页
作者
Zhang Kelian; Li Hanmei; Shi HaixianHong Wei;
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作者单位

Sun Yat Sen Univ, Guangdong Engn Technol Res Ctr,Sch Chem, Key Lab Polymer Composite & Funct Mat,Minist Educ, High Performance Organ & Polymer Photoelect Func, Guangzhou 510275, Peoples R China;

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正文语种英语
中图分类汉语教学;
关键词
Quantum efficiency; pyromellitic dianhydride; Hydrogen evolutionStackingVisible LightphotoabsorptionPI-STACKPolyimidesPhotocatalystsCharge carriers;

机译：量子效率;苯四甲酸二酐;氢evolutionStackingVisible;

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Polyimide with enhanced pi stacking for efficient visible-light-driven photocatalysis

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