南京理工大学张树鹏研究组分享 http://blog.sciencenet.cn/u/shupeng2009

博文

张树鹏老师合作文章在Chemosphere期刊发表

已有 721 次阅读 2022-10-31 11:47 |个人分类:点滴成果|系统分类:论文交流

Enhanced capacitive deionization properties of activated carbon doped with carbon nanotube-bridged molybdenum disulfide

 

Jing Sun a, Yun Li a, Haiou Song a, c, *, Hongxiang Li a, Qian Lai a, Gusunkiz Egabaierdi a, Qimeng Li a, Shupeng Zhang b, *, Huan He a, Aimin Li c


a School of the Environment, Nanjing Normal University, Nanjing 210023, PR China

b School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China

State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China


The shortage of freshwater supplies has restricted societal development. Capacitive deionization (CDI) is an emerging technology for desalination of seawater or brackish water, the performance of which is highly dependent on electrode materials. In this work, a molybdenum disulfide/carbon nanotube composite (CNTs-b-MoS2) with high capacitance was successfully synthesized using a hydrothermal method. The composite exhibited a specific capacitance of 112.79 F g-1. To reduce costs and determine the practicality of using CNTs-b-MoS2 for CDI, we combined activated carbon (AC) with CNTs-b-MoS2 as a CDI electrode. The research demonstrated that after doping with 5% (mass ratio) CNTs-b-MoS2, the specific capacitance and electrosorption capacity of AC were significantly improved and the maximum desalination capacity of CNTs-b-MoS2/AC reached 8.19 mg g-1. The low dosage of CNTs-b-MoS2 combined with the high specific surface area of AC avoided the shortcomings of CNTs-b-MoS2, namely low specific surface area and high cost. Moreover, the outstanding conductivity of CNTs-b-MoS2 improved the conductivity and enhanced the adsorption capacity of AC, giving CNTs-b-MoS2/AC potential as an advanced, low-cost CDI electrode material.

In summary, CNTs-b-MoS2 composites were successfully synthesized using a one-step hydrothermal method. The CNTs provided nucleation sites so that MoS2 could be uniformly loaded onto its surface. Electrochemical characterization of CNTs-b-MoS2 found a specific capacitance of 112.79 F g-1 and enhanced conductivity, indicating a potential for CDI. Considering that synthesis of CNTs-b-MoS2 was time-consuming and expensive, and its specific surface area was not competitive, a small amount of CNTs-b-MoS2 was added to commercial AC. This not only enhanced the conductivity of commercial AC, but also reduced the investment cost for CDI. The ternary composite electrode CNTs-b-MoS2/AC containing 5% (mass ratio) of CNTs-b-MoS2 displayed the optimal specific capacitance, which was 41.99 F g-1. Finally, CNTs-b-MoS2/AC was used as an electrode for CDI, which exhibited a maximum electrosorption capacity of 8.19 mg g-1. The desalination capacity relative to AC alone was increased by 56%, highlighting the potential of CNTs-b-MoS2/AC as an advanced and cost-effective capacitive deionization electrode material.

image.png




https://blog.sciencenet.cn/blog-311896-1361649.html

上一篇:为成长打Call-课题组代表性荣誉(2010-2021年)
下一篇:张树鹏,林佳阳等合作综合实验研究论文在《当代化工研究》期刊发表
收藏 IP: 222.190.117.*| 热度|

1 郑永军

该博文允许注册用户评论 请点击登录 评论 (0 个评论)

数据加载中...

Archiver|手机版|科学网 ( 京ICP备07017567号-12 )

GMT+8, 2023-1-28 00:58

Powered by ScienceNet.cn

Copyright © 2007- 中国科学报社

返回顶部