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Desalination stability of capacitive deionization using ordered mesoporous carbon: Effect of oxygen-containing surface groups and pore properties
Duan, Feng1,2; Du, Xuan1; Li, Yuping1; Cao, Hongbin1; Zhang, Yi1
2015-11-16
Source PublicationDESALINATION
ISSN0011-9164
Volume376Issue:NOVPages:17-24
AbstractOrdered mesoporous carbons (OMCs) with various pore properties and oxygen-containing functional groups were obtained by changing preparation conditions and thermal or chemical modification after preparation. The modification hardly changed the pore structure of OMCs but did tailor surface properties. Desalination performance of capacitive deionization (CDI) by OMCs was investigated during 50 continuous cyclic adsorption/desorption experiments using a 500 mg/L NaCl solution and an applied potential of 1.2 V. The results showed pronounced degradation in the desalination performance for all materials as the cycle number increased, and an inversion in conductivity appeared at the beginning of the adsorption or desorption stage after several cycles. The surface properties are important for initial desalination, with the material with moderate oxygen functional groups displaying the largest desalination capacity, rate and charge efficiency. However, these groups had a negligible effect on the long-term desalination stability. The material which had a very small surface area and pore size underwent the most remarkable performance degradation, and large surface area and pore diameter were more favorable towards long-term stability. The deterioration in CDI performance was attributed partially to the decrease in surface area and mostly to an increase in oxygen functional groups on the electrodes, especially the anodes. (C) 2015 Elsevier B.V. All rights reserved.
KeywordCapacitive Deionization Surface Groups Pore Properties Cycling Stability
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
DOI10.1016/j.desal.2015.08.009
Indexed BySCI
Language英语
WOS KeywordSPONGE-TEMPLATED PREPARATION ; DE-IONIZATION PROCESSES ; LONG-TERM STABILITY ; WATER DESALINATION ; XEROGEL ELECTRODES ; BRACKISH-WATER ; NACL SOLUTIONS ; POROUS CARBON ; AREA GRAPHENE ; ZERO CHARGE
WOS Research AreaEngineering ; Water Resources
WOS SubjectEngineering, Chemical ; Water Resources
WOS IDWOS:000362618700003
Citation statistics
Cited Times:32[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/19603
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Duan, Feng,Du, Xuan,Li, Yuping,et al. Desalination stability of capacitive deionization using ordered mesoporous carbon: Effect of oxygen-containing surface groups and pore properties[J]. DESALINATION,2015,376(NOV):17-24.
APA Duan, Feng,Du, Xuan,Li, Yuping,Cao, Hongbin,&Zhang, Yi.(2015).Desalination stability of capacitive deionization using ordered mesoporous carbon: Effect of oxygen-containing surface groups and pore properties.DESALINATION,376(NOV),17-24.
MLA Duan, Feng,et al."Desalination stability of capacitive deionization using ordered mesoporous carbon: Effect of oxygen-containing surface groups and pore properties".DESALINATION 376.NOV(2015):17-24.
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