A large-scale synthesis of photoluminescent carbon quantum dots: a self-exothermic reaction driving the formation of the nanocrystalline core at room temperature
| العنوان: | A large-scale synthesis of photoluminescent carbon quantum dots: a self-exothermic reaction driving the formation of the nanocrystalline core at room temperature |
|---|---|
| المؤلفون: | Cheng Zhi Huang, Meng Li Liu, Ze Xi Liu, Bin Bin Chen, Wen Chan Deng, Lei Zhan |
| المصدر: | Green Chemistry. 18:5127-5132 |
| بيانات النشر: | Royal Society of Chemistry (RSC), 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | Exothermic reaction, Materials science, Photoluminescence, Carbonization, chemistry.chemical_element, Quantum yield, Nanotechnology, Ethylenediamine, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Pollution, Nanocrystalline material, 0104 chemical sciences, Nanomaterials, chemistry.chemical_compound, chemistry, Chemical engineering, Environmental Chemistry, 0210 nano-technology, Carbon |
| الوصف: | Carbon quantum dots (CQDs), a rising star family in photoluminescent (PL) nanomaterials, have been identified to have a core–shell structure with the nanocrystalline core of sp2-hybridized carbon clusters and the functional group formed shell of sp3-hybridized carbons, in which the core formation usually needs high-temperature carbonization. Herein, we develop a route to prepare CQDs on a large scale by using hydroquinone and ethylenediamine (EDA) as the precursors and the EDA-catalyzed decomposition of hydrogen peroxide at room temperature. The released heat from this highly exothermic reaction system can rapidly prompt the formation of the nanocrystalline core. The as-prepared CQDs in situ show green PL properties around 525 nm under excitation at 320 to 420 nm with the absolute quantum yield of 24.6%, and can find applications in visual analysis and other fields. |
| تدمد: | 1463-9270 1463-9262 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::62e6d46293ca2491f84a41519e6c01d0 https://doi.org/10.1039/c6gc01820c |
| رقم الأكسشن: | edsair.doi...........62e6d46293ca2491f84a41519e6c01d0 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14639270 14639262 |
|---|