Microwave Assisted Hydrothermal Way Towards Highly Crystalized N-Doped Carbon Quantum Dots and Their Oxygen Reduction Performance
| Autor: | Cailing Chen, Chen Liang, He Huang, Yue Lou, Haoyan Sha, Chunguang Li, Shouhua Feng, Zhan Shi, Ying Yu, Xiaobo Chen |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Electrocatalyst 01 natural sciences Fluorescence Hydrothermal circulation 0104 chemical sciences Ion Catalysis Anode Chemical engineering Quantum dot 0210 nano-technology Luminescence |
| Zdroj: | Chemical Research in Chinese Universities. 35:171-178 |
| ISSN: | 2210-3171 1005-9040 |
| DOI: | 10.1007/s40242-019-8343-y |
| Popis: | We proposed a green microwave-assisted hydrothermal way to synthesize highly crystalized N-doped carbon quantum dots(N-CQDs). The N-CQDs obtained by this microwave method have good crystalline degree(ID/IG=0.6) and a high molar ratio of N/C(11.1%) comparing with those obtained from traditional top-down method. The experimental results show that glycerine plays a key role in the formation of highly crystalized N-CQDs. The as-prepared N-CQDs have good luminescent property and may be utilized as fluorescent probe to detect ions or mark cells. As the majority of N atoms in the N-CQDs were pyridinic type(64.8%), the as-prepared N-CQDs were used as a catalyst for the oxygen reduction reaction(ORR) electrocatalysis in the anode of the fuel cell(the onset potential is–0.121 V), which was a 4e-transfer procedure and the catalyst showed good stability after 100 cycles. |
| Databáze: | OpenAIRE |
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