dc.contributor.authorWang, Yilei
dc.contributor.authorEl-Deen, Ahmed G.
dc.contributor.authorLi, Peng
dc.contributor.authorOh, Bernice Hui Lin
dc.contributor.authorGuo, Zanru
dc.contributor.authorKhin, Mya Mya
dc.contributor.authorVikhe, Yogesh Shankar
dc.contributor.authorWang, Jing
dc.contributor.authorHu, Rebecca G.
dc.contributor.authorBoom, Remko M.
dc.contributor.authorKline, Kimberly A.
dc.contributor.authorBecker, David Laurence
dc.contributor.authorDuan, Hongwei
dc.contributor.authorChan-Park, Mary B.
dc.date.accessioned2016-09-06T06:10:34Z
dc.date.available2016-09-06T06:10:34Z
dc.date.issued2015
dc.identifier.citationWang, Y., El-Deen, A. G., Li, P., Oh, B. H., Guo, Z., Khin, M. M., et al. (2015). High-Performance Capacitive Deionization Disinfection of Water with Graphene Oxide-graft-Quaternized Chitosan Nanohybrid Electrode Coating. ACS Nano, 9(10), 10142-10157.en_US
dc.identifier.issn1936-0851en_US
dc.identifier.urihttp://hdl.handle.net/10220/41422
dc.description.abstractWater disinfection materials should ideally be broad-spectrum-active, nonleachable, and noncontaminating to the liquid needing sterilization. Herein, we demonstrate a high-performance capacitive deionization disinfection (CDID) electrode made by coating an activated carbon (AC) electrode with cationic nanohybrids of graphene oxide-graft-quaternized chitosan (GO-QC). Our GO-QC/AC CDID electrode can achieve at least 99.9999% killing (i.e., 6 log reduction) of Escherichia coli in water flowing continuously through the CDID cell. Without the GO-QC coating, the AC electrode alone cannot kill the bacteria and adsorbs a much smaller fraction (<82.8 ± 1.8%) of E. coli from the same biocontaminated water. Our CDID process consists of alternating cycles of water disinfection followed by electrode regeneration, each a few minutes duration, so that this water disinfection process can be continuous and it only needs a small electrode voltage (2 V). With a typical brackish water biocontamination (with 104 CFU mL–1 bacteria), the GO-QC/AC electrodes can kill 99.99% of the E. coli in water for 5 h. The disinfecting GO-QC is securely attached on the AC electrode surface, so that it is noncontaminating to water, unlike many other chemicals used today. The GO-QC nanohybrids have excellent intrinsic antimicrobial properties in suspension form. Further, the GO component contributes toward the needed surface conductivity of the CDID electrode. This CDID process offers an economical method toward ultrafast, contaminant-free, and continuous killing of bacteria in biocontaminated water. The proposed strategy introduces a green in situ disinfectant approach for water purification.en_US
dc.description.sponsorshipNRF (Natl Research Foundation, S’pore)en_US
dc.description.sponsorshipMOE (Min. of Education, S’pore)en_US
dc.format.extent45 p.en_US
dc.language.isoenen_US
dc.relation.ispartofseriesACS Nanoen_US
dc.rights© 2016 American Chemical Society. This is the author created version of a work that has been peer reviewed and accepted for publication by ACS Nano, American Chemical Society. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1021/acsnano.5b03763].en_US
dc.subjectWater disinfectionen_US
dc.subjectCapacitive deionizationen_US
dc.titleHigh-Performance Capacitive Deionization Disinfection of Water with Graphene Oxide-graft-Quaternized Chitosan Nanohybrid Electrode Coatingen_US
dc.typeJournal Article
dc.contributor.researchSingapore Centre on Environmental Life Sciences Engineering
dc.contributor.schoolSchool of Chemical and Biomedical Engineeringen_US
dc.contributor.schoolSchool of Biological Sciencesen_US
dc.contributor.schoolLee Kong Chian School of Medicine
dc.identifier.doihttp://dx.doi.org/10.1021/acsnano.5b03763
dc.description.versionAccepted versionen_US


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