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Capacitive deionization by ordered mesoporous carbon: electrosorption isotherm, kinetics, and the effect of modification
Alternative TitleDesalin. Water Treat.
Duan, Feng1,2,3; Li, Yuping1,2; Cao, Hongbin1,2; Xie, Yongbing1,2; Zhang, Yi1,2
2014-02-23
Source PublicationDESALINATION AND WATER TREATMENT
ISSN1944-3994
Volume52Issue:7-9Pages:1388-1395
AbstractIn this study, an ordered mesoporous carbon (OMC) was synthesized and investigated as electrodes for capacitive deionization (CDI). The influence of working parameters on salt removal was studied and the electrosorption isotherm and kinetics were investigated. It was found that the electrosorption process fitted both Langmuir isotherm and Freundlich isotherm, and followed pseudo-first-order kinetics. The maximum electrosorptive capacity was 10.1mg/g at the optimized applied voltage of 1.2V and flow rate of 40ml/min. In order to investigate the effect of surface groups on CDI efficiency, OMC was modified by H2O2 solution or thermal treatment under N-2 atmosphere, without significantly changing its textural properties. X-ray photoelectron spectroscopy measurements showed that the amount of surface oxygen-containing groups was decreased and increased by the thermal and chemical treatments, respectively. CDI experiments revealed that OMC modified by H2O2 solution performed better than original OMC, while thermal treatment worsened the performance of OMC, probably due to the difference in their surface groups. This indicated that the CDI performance of OMC was greatly affected by the surface chemistry.; In this study, an ordered mesoporous carbon (OMC) was synthesized and investigated as electrodes for capacitive deionization (CDI). The influence of working parameters on salt removal was studied and the electrosorption isotherm and kinetics were investigated. It was found that the electrosorption process fitted both Langmuir isotherm and Freundlich isotherm, and followed pseudo-first-order kinetics. The maximum electrosorptive capacity was 10.1mg/g at the optimized applied voltage of 1.2V and flow rate of 40ml/min. In order to investigate the effect of surface groups on CDI efficiency, OMC was modified by H2O2 solution or thermal treatment under N-2 atmosphere, without significantly changing its textural properties. X-ray photoelectron spectroscopy measurements showed that the amount of surface oxygen-containing groups was decreased and increased by the thermal and chemical treatments, respectively. CDI experiments revealed that OMC modified by H2O2 solution performed better than original OMC, while thermal treatment worsened the performance of OMC, probably due to the difference in their surface groups. This indicated that the CDI performance of OMC was greatly affected by the surface chemistry.
KeywordOrdered Mesoporous Carbon Capacitive Deionization Electrosorption Modification Surface Chemistry
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
DOI10.1080/19443994.2013.787027
URL查看原文
Indexed BySCI
Language英语
WOS KeywordRO BRINE TREATMENT ; ACTIVATED CARBON ; COMPOSITE ELECTRODES ; BRACKISH-WATER ; DESALINATION ; REMOVAL ; PERFORMANCE ; AEROGEL ; IONS
WOS Research AreaEngineering ; Water Resources
WOS SubjectEngineering, Chemical ; Water Resources
WOS IDWOS:000331695700018
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/10897
Collection研究所(批量导入)
Affiliation1.Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
3.UCAS, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Duan, Feng,Li, Yuping,Cao, Hongbin,et al. Capacitive deionization by ordered mesoporous carbon: electrosorption isotherm, kinetics, and the effect of modification[J]. DESALINATION AND WATER TREATMENT,2014,52(7-9):1388-1395.
APA Duan, Feng,Li, Yuping,Cao, Hongbin,Xie, Yongbing,&Zhang, Yi.(2014).Capacitive deionization by ordered mesoporous carbon: electrosorption isotherm, kinetics, and the effect of modification.DESALINATION AND WATER TREATMENT,52(7-9),1388-1395.
MLA Duan, Feng,et al."Capacitive deionization by ordered mesoporous carbon: electrosorption isotherm, kinetics, and the effect of modification".DESALINATION AND WATER TREATMENT 52.7-9(2014):1388-1395.
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