An ‘ice-melting’ kinetic control strategy for highly photocatalytic organic nanocrystals
| Autor: | Yao Shenglian, Dongjian Jiang, Yujuan Zhang, Lu-Ning Wang, Federico Rosei, Xiaohong Zhang, Zheng-Hong Huang, Feiyu Kang, Yingzhi Chen |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Nanostructure Renewable Energy Sustainability and the Environment 02 engineering and technology General Chemistry Orders of magnitude (numbers) 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Amorphous solid Organic semiconductor Crystallinity Chemical engineering Nanocrystal Photocatalysis General Materials Science 0210 nano-technology Order of magnitude |
| Zdroj: | Journal of Materials Chemistry A. 8:25275-25282 |
| ISSN: | 2050-7496 2050-7488 |
| Popis: | Engineering the size, shape and crystallinity of organic semiconductor nanostructures (OSNs) offers the opportunity of fine tuning their optoelectronic properties for photocatalytic applications. Here, we report a facile and general ‘ice-melting’ kinetic control strategy to synthesize OSNs with excellent photocatalytic performance. The ultraslow release and interaction of organic molecules from ice melting yields an ultralow local concentration (∼five orders of magnitude fewer molecules), fundamentally enhancing the energy barrier thus leading to their relaxed and ordered assembly into refined nanocrystals (∼one order of magnitude smaller in size, morphological change from amorphous to crystalline); such nanocrystals display improved light-harvesting and charge transfer properties and consequent photocatalytic efficiency towards degrading organic pollutants compared to standard OSNs, or even commercial titania photocatalysts (Degussa P25); we also generalize the ‘ice-melting’ kinetic control strategy to synthesize a series of highly photoactive organic nanocrystals. |
| Databáze: | OpenAIRE |
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