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...
| Main Authors: | , , , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2016
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| Online Access: | https://hdl.handle.net/10356/83397 http://hdl.handle.net/10220/41422 |
| _version_ | 1826120271476555776 |
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| 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. |
| 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. |
| author_sort | Wang, Yilei |
| collection | NTU |
| 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. |
| first_indexed | 2024-10-01T05:13:26Z |
| format | Journal Article |
| id | ntu-10356/83397 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:13:26Z |
| publishDate | 2016 |
| record_format | dspace |
| spelling | ntu-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 |
| 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 |
| title | 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_short | 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 |
| topic | Water disinfection Capacitive deionization |
| url | https://hdl.handle.net/10356/83397 http://hdl.handle.net/10220/41422 |
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