Trace-Fe-Enhanced Capacitive Deionization of Saline Water by Boosting Electron Transfer of Electro-Adsorption Sites

被引：138
作者：
Wang, Guizhi [1 ]
Yan, Tingting [1 ]
Zhang, Jianping [1 ]
Shi, Liyi [1 ]
Zhang, Dengsong [1 ]
机构：
[1] Shanghai Univ, State Key Lab Adv Special Steel, Sch Mat Sci & Engn, Res Ctr Nano Sci & Technol,Dept Chem,Coll Sci, Shanghai 200444, Peoples R China
来源：
ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2020年 / 54卷 / 13期
基金：
中国国家自然科学基金;
关键词：
CARBON NANOSHEETS; GRAPHENE OXIDE; INTERCALATION; PERFORMANCE; COMPOSITES; REMOVAL; AMINE; ANODE;
D O I：
10.1021/acs.est.0c01518
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Capacitive deionization (CDI) is a promising water purification technology. However, the current ion adsorption capacity of CDI electrode materials is still an issue, which cannot meet the rapid demand of clean water from saline water. Herein, trace-Fe-enhanced removal of ions from saline water via CDI is presented. The ion adsorption capacity of CDI electrodes is up to 36.25 mg g(-1) in a 500 mg L-1 NaCl media at 1.2 V together with stable regeneration property. In situ Raman and ex situ XPS measurements unravel the removal mechanism of ions from saline water, and the reinforced adsorption of ions is due to the introduction of trace Fe boosting electron transfer of electro-adsorption sites during the CDI process. This work presents a promising solution to highly efficient capacitive deionization for saline water.
引用
收藏
页码：8411 / 8419
页数：9
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