Citation: Ping Ye, Lingshuang Qin, Mengyao He, Fangfang Wu, Zengye Chen, Mingxing Liang, Libo Deng. 荷叶衍生多孔碳的零电荷电位调节实现废水中电化学捕集镉离子[J]. Acta Physico-Chimica Sinica, ;2025, 41(3): 231103. doi: 10.3866/PKU.WHXB202311032 shu

荷叶衍生多孔碳的零电荷电位调节实现废水中电化学捕集镉离子

1.
College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, Guangdong Province, China;
2.
College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, Guangdong Province, China

Received Date: 26 November 2023
Revised Date: 9 January 2024
Accepted Date: 4 February 2024

Fund Project: The project was supported by the Shenzhen Science and Technology Program (JCYJ20220818095806013, JCYJ20230808105111022), Natural Science Foundation of Guangdong Province (2023A1515012267), National Natural Science Foundation of China (22178223), and National Sponsored Postdoctoral Researcher Program of China (GZC20231721).

随着电池、电镀和采矿业的发展，镉(Cd²⁺)等重金属离子被大量排放，对环境造成严重威胁。由于废水中Cd²⁺浓度低，传统的去除技术存在动力学慢、二次污染等问题。因此，本文通过微波热解和KOH活化工艺，制备了荷叶衍生碳，开发了基于生物质衍生碳、不对称结构的电容性去离子(CDI)系统。结果表明，获得的纳米片状薄碳(NSTC-3)具有3705.0 m²∙g^-1的超高比表面积，在0.5 A∙g^-1电流密度下展现了92.5 F∙g^-1的比电容(NSTC-3为工作电极，商业活性炭YP-50F为对电极)。分别以YP-50F、NSTC-3为阳极和阴极，在1.2 V电压下，实现了88.6 mg_Cd·g_cathode^-1的电吸附容量(Cd²⁺的初始浓度为100 mg∙L^-1)，比对称构型(NSTC-3//NSTC-3)的性能提高了36.3%。优异的去除性能和良好的循环稳定性归因于电极表面电荷性质的调控和不对称电极结构的构建，从而最大限度地减少了同离子排斥，调节了电极电势分布。本研究为设计生物炭基电化学水处理工艺提供了新思路。
- Capacitive deionization,
- Cadmium,
- Lotus leaf-derived carbon,
- Asymmetric configuration,
- Potential of zero charge
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沈阳化工大学材料科学与工程学院沈阳 110142