Microwave Assisted Hydrothermal Way Towards Highly Crystalized N-Doped Carbon Quantum Dots and Their Oxygen Reduction Performance
He Huang , Chen Liang , Haoyan Sha , Ying Yu , Yue Lou , Cailing Chen , Chunguang Li , Xiaobo Chen , Zhan Shi , Shouhua Feng
Chemical Research in Chinese Universities ›› 2019, Vol. 35 ›› Issue (2) : 171 -178.
Microwave Assisted Hydrothermal Way Towards Highly Crystalized N-Doped Carbon Quantum Dots and Their Oxygen Reduction Performance
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(I D/I G=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.
Carbon-dot / Nitrogen-dopping / Highly-crystalized / Oxygen reduction reaction(ORR)
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