Anion-selective capacitive deionization using functionalized rGO thin films

Drinking water shortage is worsening. Capacitive deionization (CDI) of saltwater has gained attention due to its low energy consumption and environmental friendliness. A single anion exchange membrane (AEM) can selectively move anions to positive electrodes for better desalination performances. Poly...

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Bibliographic Details
Published inMRS communications Vol. 13; no. 6; pp. 1342 - 1348
Main Authors Cheng, H.-C., Chen, P.-A., Peng, C.-Y., Liu, S.-H., Tuan, Y.-J., Wang, Hong Paul
Format Journal Article
LanguageEnglish
Published Cham Springer International Publishing 01.12.2023
Subjects
Biomaterials
Characterization and Evaluation of Materials
Chemistry and Materials Science
Materials Engineering
Materials Science
Nanotechnology
Polymer Sciences
Research Letter
Composite
Chemical synthesis
Graphene
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Summary:Drinking water shortage is worsening. Capacitive deionization (CDI) of saltwater has gained attention due to its low energy consumption and environmental friendliness. A single anion exchange membrane (AEM) can selectively move anions to positive electrodes for better desalination performances. Poly(diallyldimethylammonium chloride)-functionalized reduced graphene oxide (PrGO) serves as an AEM for CDI. The AC and PrGO coated AC electrode pair (AC‖PrGO/AC) for CDI of saltwater under + 1.5 V for 1 h reaches a high optimized-salt removal and electrosorption capacity. This work presents the feasibility using the high-efficiency and facile PrGO anion-selective thin film layer served as an AEM analog for a simplified and low-cost membrane-CDI process to enhance desalination performances for potential water recycling and reuse from salt, inorganic waste or metal-contaminated ground waters. Graphical abstract
ISSN:2159-6867
2159-6867
DOI:10.1557/s43579-023-00465-9