High-Performance Capacitive Deionization Disinfection of Water with Graphene Oxide-graft-Quaternized Chitosan Nanohybrid Electrode Coating

Water 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 cation...

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Main Authors: Wang, Yilei, El-Deen, Ahmed G., Li, Peng, Oh, Bernice Hui Lin, Guo, Zanru, Khin, Mya Mya, Vikhe, Yogesh Shankar, Wang, Jing, Hu, Rebecca G., Boom, Remko M., Kline, Kimberly A., Becker, David Lawrence, Duan, Hongwei, Chan-Park, Mary B.
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2016
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Online Access:https://hdl.handle.net/10356/83397
http://hdl.handle.net/10220/41422
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spelling sg-ntu-dr.10356-833972021-03-10T02:46:53Z High-Performance Capacitive Deionization Disinfection of Water with Graphene Oxide-graft-Quaternized Chitosan Nanohybrid Electrode Coating Wang, Yilei El-Deen, Ahmed G. Li, Peng Oh, Bernice Hui Lin Guo, Zanru Khin, Mya Mya Vikhe, Yogesh Shankar Wang, Jing Hu, Rebecca G. Boom, Remko M. Kline, Kimberly A. Becker, David Lawrence Duan, Hongwei Chan-Park, Mary B. School of Chemical and Biomedical Engineering School of Biological Sciences Lee Kong Chian School of Medicine (LKCMedicine) Singapore Centre for Environmental Life Sciences Engineering Water disinfection Capacitive deionization Water 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. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Accepted version 2016-09-06T06:10:34Z 2019-12-06T15:21:35Z 2016-09-06T06:10:34Z 2019-12-06T15:21:35Z 2015 Journal Article Wang, 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. 1936-0851 https://hdl.handle.net/10356/83397 http://hdl.handle.net/10220/41422 10.1021/acsnano.5b03763 en ACS Nano © 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]. 45 p. application/pdf application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Water disinfection
Capacitive deionization
spellingShingle Water disinfection
Capacitive deionization
Wang, Yilei
El-Deen, Ahmed G.
Li, Peng
Oh, Bernice Hui Lin
Guo, Zanru
Khin, Mya Mya
Vikhe, Yogesh Shankar
Wang, Jing
Hu, Rebecca G.
Boom, Remko M.
Kline, Kimberly A.
Becker, David Lawrence
Duan, Hongwei
Chan-Park, Mary B.
High-Performance Capacitive Deionization Disinfection of Water with Graphene Oxide-graft-Quaternized Chitosan Nanohybrid Electrode Coating
description Water 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.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Wang, Yilei
El-Deen, Ahmed G.
Li, Peng
Oh, Bernice Hui Lin
Guo, Zanru
Khin, Mya Mya
Vikhe, Yogesh Shankar
Wang, Jing
Hu, Rebecca G.
Boom, Remko M.
Kline, Kimberly A.
Becker, David Lawrence
Duan, Hongwei
Chan-Park, Mary B.
format Article
author Wang, Yilei
El-Deen, Ahmed G.
Li, Peng
Oh, Bernice Hui Lin
Guo, Zanru
Khin, Mya Mya
Vikhe, Yogesh Shankar
Wang, Jing
Hu, Rebecca G.
Boom, Remko M.
Kline, Kimberly A.
Becker, David Lawrence
Duan, Hongwei
Chan-Park, Mary B.
author_sort Wang, Yilei
title High-Performance Capacitive Deionization Disinfection of Water with Graphene Oxide-graft-Quaternized Chitosan Nanohybrid Electrode Coating
title_short High-Performance Capacitive Deionization Disinfection of Water with Graphene Oxide-graft-Quaternized Chitosan Nanohybrid Electrode Coating
title_full High-Performance Capacitive Deionization Disinfection of Water with Graphene Oxide-graft-Quaternized Chitosan Nanohybrid Electrode Coating
title_fullStr High-Performance Capacitive Deionization Disinfection of Water with Graphene Oxide-graft-Quaternized Chitosan Nanohybrid Electrode Coating
title_full_unstemmed High-Performance Capacitive Deionization Disinfection of Water with Graphene Oxide-graft-Quaternized Chitosan Nanohybrid Electrode Coating
title_sort high-performance capacitive deionization disinfection of water with graphene oxide-graft-quaternized chitosan nanohybrid electrode coating
publishDate 2016
url https://hdl.handle.net/10356/83397
http://hdl.handle.net/10220/41422
_version_ 1695706174455808000