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Redox-catalysis flow electrode desalination in an organic solvent
Wei, Qiang1,2; Tang, Lufan1,2; Ramalingam, Karthick1,2; Liang, Mengjun1,2; Ma, Jinxing3; Shi, Yumeng4; Hui, Kwun Nam5; Hui, Kwan San6; Chen, Fuming1,2
Source PublicationJournal of Materials Chemistry A

The typical flow electrode capacitive deionization (FCDI) device uses carbon materials as flow electrodes in aqueous conditions. The low salt removal rate and high energy consumption have hindered further development. In this study, we propose an organic redox flow electrode in FCDI to achieve a quick salt removal process and low energy consumption. The organic medium,i.e., acetonitrile, containing 50 mM NaI/30 mM Ielectrolyte as the redox couples replaces the conventional water-based electrolyte. With the addition of 3 wt% multi-wall carbon nanotubes with the -NHgroup, the highest desalination rate of 6.8 μg cmscould be achieved at a current density of 13 mA cm, which is the highest desalination rate in capacitive deionization systems applied to date. Furthermore, the electrical energy consumption is reduced to zero when using the light illumination on the semiconductor as the driving force. The high-performance FCDI device based on the organic redox electrodes is of great significance for the practical desalination application at a low energy cost.

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Indexed BySCIE
WOS Research AreaChemistry ; Energy & Fuels ; Materials Science
WOS SubjectChemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS IDWOS:000700903900001
Scopus ID2-s2.0-85117065416
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Cited Times [WOS]:10   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
Corresponding AuthorChen, Fuming
Affiliation1.South China Normal Univ, Guangdong Engn Technol Res Ctr Efficient Green En, Sch Phys & Telecommun Engn, Guangdong Prov Key Lab Quantum Engn & Quantum Mat, Guangzhou 510006, Peoples R China
2.School of Electronics and Information Engineering, South China Normal University, Foshan, 528225, China
3.Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou, 510006, China
4.International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
5.Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Avenida da Universidade, 999078, Macao
6.School of Engineering, Faculty of Science, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
Recommended Citation
GB/T 7714
Wei, Qiang,Tang, Lufan,Ramalingam, Karthick,et al. Redox-catalysis flow electrode desalination in an organic solvent[J]. Journal of Materials Chemistry A,2021,9(39):22254-22261.
APA Wei, Qiang,Tang, Lufan,Ramalingam, Karthick,Liang, Mengjun,Ma, Jinxing,Shi, Yumeng,Hui, Kwun Nam,Hui, Kwan San,&Chen, Fuming.(2021).Redox-catalysis flow electrode desalination in an organic solvent.Journal of Materials Chemistry A,9(39),22254-22261.
MLA Wei, Qiang,et al."Redox-catalysis flow electrode desalination in an organic solvent".Journal of Materials Chemistry A 9.39(2021):22254-22261.
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