Boron and nitrogen co-doped porous carbon derived from sodium alginate enhanced capacitive deionization for water purification  

作　　者：Xiao Yong Pengfei Sha Jinghui Peng Mengdi Liu Qian Zhang Jianhua Yu Liyan Yu Lifeng Dong 

机构地区：[1]College of Materials Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China [2]Department of Physics,Hamline University,Saint Paul,MN 55104,USA

出　　处：《Frontiers of Chemical Science and Engineering》2023年第12期2014-2024,共11页化学科学与工程前沿（英文版）

基　　金：partially supported by the National Natural Science Foundation of China(Grant Nos.51472174,61604086,and 21776147);the Shandong Province Natural Science Foundation(Grant Nos.ZR2018BB066,ZR2021YQ32,and ZR2022QB164);the Taishan Scholar Project of Shandong Province(Grant No.tsqn201909117)。

摘　　要：Capacitive deionization can alleviate water shortage and water environmental pollution, but performances are greatly determined by the electrochemical and desalination properties of its electrode materials. In this work, B and N co-doped porous carbon with micro-mesoporous structures is derived from sodium alginate by a carbonization, activation, and hydrothermal doping process, which exhibits large specific surface area (2587 m^(2)·g^(‒1)) and high specific capacitance (190.7 F·g^(‒1)) for adsorption of salt ions and heavy metal ions. Furthermore, the materials provide a desalination capacity of 26.9 mg·g−1 at 1.2 V in 500 mg·L^(‒1) NaCl solution as well as a high removal capacity (239.6 mg·g^(‒1)) and adsorption rate (7.99 mg·g^(‒1)·min^(‒1)) for Pb2+ with an excellent cycle stability. This work can pave the way to design low-cost porous carbon with high-performances for removal of salt ions and heavy metal ions.

关 键 词：capacitance deionization porous carbon B N co-doping heavy metal ions water purification 

分 类 号：O64[理学—物理化学]