Preparation of carbon dots from carbonized corncobs by electrochemical oxidation and their application in Na-batteries

LI Rui-lin; ZHAO Zong-bin; LENG Chang-yu; LI Yong; AI Li-shen; SUN Yang; WANG Xu-zhen; QIU Jie-shan

doi:10.1016/S1872-5805(22)60644-9

Volume 38 Issue 2

Apr. 2023

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Article Navigation > New Carbon Mater. > 2023 > 38(2): 347-355

LI Rui-lin, ZHAO Zong-bin, LENG Chang-yu, LI Yong, AI Li-shen, SUN Yang, WANG Xu-zhen, QIU Jie-shan. Preparation of carbon dots from carbonized corncobs by electrochemical oxidation and their application in Na-batteries. New Carbon Mater., 2023, 38(2): 347-355. doi: 10.1016/S1872-5805(22)60644-9

Citation:

LI Rui-lin, ZHAO Zong-bin, LENG Chang-yu, LI Yong, AI Li-shen, SUN Yang, WANG Xu-zhen, QIU Jie-shan. Preparation of carbon dots from carbonized corncobs by electrochemical oxidation and their application in Na-batteries. New Carbon Mater., 2023, 38(2): 347-355. doi: 10.1016/S1872-5805(22)60644-9

Citation:

LI Rui-lin, ZHAO Zong-bin, LENG Chang-yu, LI Yong, AI Li-shen, SUN Yang, WANG Xu-zhen, QIU Jie-shan. Preparation of carbon dots from carbonized corncobs by electrochemical oxidation and their application in Na-batteries. New Carbon Mater., 2023, 38(2): 347-355. doi: 10.1016/S1872-5805(22)60644-9

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Preparation of carbon dots from carbonized corncobs by electrochemical oxidation and their application in Na-batteries

doi: 10.1016/S1872-5805(22)60644-9

1.
State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory for Energy Materials and Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
2.
College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China

Funds: National Natural Science Foundation of China (52172038, 22179017, U1610105).

More Information

Author Bio:
LI Rui-lin, Master Student. E-mail: ruilinli2019@163.com
Corresponding author: ZHAO Zong-bin, Ph. D, Professor. E-mail: zbzhao@dlut.edu.cn; QIU Jie-shan, Ph. D, Professor. E-mail: jqiu@dlut.edu.cn
Received Date: 2022-11-23
Rev Recd Date: 2023-03-03

Available Online: 2022-08-23

Publish Date: 2023-04-07

Abstract

Abstract

Carbon dots (CDs) have attracted increasing attention due to their high specific surface area, good dispersion, abundant surface functional groups, low biotoxicity and photoluminescence. However, their preparation on a large-scale is still a great challenge because of the high cost and environmental problems, and this seriously limits their practical applications. Herein, carbonized corncobs were used as the starting material for the preparation of the CDs by electrochemical oxidation. Their natural porous structures with well-developed channels allow the electrode to be filled with electrolyte, and the electrochemical oxidation takes place both on the inside and outside surfaces of the carbonized corncob, achieving a CD output of 79.8 mg h⁻¹ per gram of electrode material at 1 A. The CDs were combined with graphene oxide (GO) to produce CD/rGO composite aerogels by a hydrothermal method. After heat treatment at 600 °C, the materials obtained were used as the anode in a sodium ion battery, which had a capacity of 263.3 mAh g⁻¹ after 1 000 cycles at 1 A g⁻¹. This work suggests a new way to prepare CDs and possibly expand their range of application.
- Corncob,
- Carbon dots,
- Electrochemical synthesis,
- Sodium ion batteries

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References(39)

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