Low energy consumption dual-ion electrochemical deionization system using NaTi2(PO4)3-AgNPs electrodes

Novel desalination technologies with high ion removal capacity and low energy consumption are urgently needed to solve the water scarcity problem. Here we report a novel energy efficient dual-ions electrochemical deionization (DEDI) system with Ag nanoparticles/reduced graphene-oxide (AgNPs/rGO) as...

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Main Authors: Huang, Yinxi, Chen, Fuming, Guo, Lu, Zhang, Jun, Chen, Tupei, Yang, Hui Ying
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2021
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Online Access:https://hdl.handle.net/10356/150758
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1507582021-06-08T06:55:26Z Low energy consumption dual-ion electrochemical deionization system using NaTi2(PO4)3-AgNPs electrodes Huang, Yinxi Chen, Fuming Guo, Lu Zhang, Jun Chen, Tupei Yang, Hui Ying School of Electrical and Electronic Engineering Engineering::Environmental engineering Membrane Capacitive Deionization Reduced Graphene Oxide Novel desalination technologies with high ion removal capacity and low energy consumption are urgently needed to solve the water scarcity problem. Here we report a novel energy efficient dual-ions electrochemical deionization (DEDI) system with Ag nanoparticles/reduced graphene-oxide (AgNPs/rGO) as chloride ion Faradaic electrode and NaTi2(PO4)3/reduced graphene-oxide (NTP/rGO) as sodium ion Faradaic electrode. During the intercalation process, the sodium ions and chloride ions in the feed solution will be chemically intercalated into NTP/rGO electrode and AgNPs/rGO electrode, respectively. The DEDI system shows a stable and reversible salt removal capacity of 105 mg g−1 for 50 cycles with applied voltage range of −1.2–1.4 V. More importantly, when applying from 0 V to 1.4 V, although the removal capacity is relatively low (35.8 mg g−1), the energy recovery of this system is higher than 30% and the energy consumption is as low as 0.127 Wh g−1. Considering the brackish water used here is 2500 ppm, the energy consumption can be estimated to be 0.254 Wh L−1 for desalination of brackish water to drinkable water (500 ppm). The excellent performance of this DEDI system has made it a promising commercial technology for desalination of brackish water even seawater in the future. Environment & Water Industry Development Council (EWI) National Research Foundation (NRF) Public Utilities Board (PUB) This research work is supported by the National Research Foundation of Singapore, Prime Minister’s Office under its Environment & Water Research Programme with Grant No. 1301-IRIS-17 and administered by the Environment & Water Industry Programme Office (EWI) of the PUB, Singapore’s national agency. 2021-06-08T06:55:26Z 2021-06-08T06:55:26Z 2019 Journal Article Huang, Y., Chen, F., Guo, L., Zhang, J., Chen, T. & Yang, H. Y. (2019). Low energy consumption dual-ion electrochemical deionization system using NaTi2(PO4)3-AgNPs electrodes. Desalination, 451, 241-247. https://dx.doi.org/10.1016/j.desal.2018.02.006 0011-9164 https://hdl.handle.net/10356/150758 10.1016/j.desal.2018.02.006 2-s2.0-85041962479 451 241 247 en 1301-IRIS-17 Desalination © 2018 Elsevier B.V. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Environmental engineering
Membrane Capacitive Deionization
Reduced Graphene Oxide
spellingShingle Engineering::Environmental engineering
Membrane Capacitive Deionization
Reduced Graphene Oxide
Huang, Yinxi
Chen, Fuming
Guo, Lu
Zhang, Jun
Chen, Tupei
Yang, Hui Ying
Low energy consumption dual-ion electrochemical deionization system using NaTi2(PO4)3-AgNPs electrodes
description Novel desalination technologies with high ion removal capacity and low energy consumption are urgently needed to solve the water scarcity problem. Here we report a novel energy efficient dual-ions electrochemical deionization (DEDI) system with Ag nanoparticles/reduced graphene-oxide (AgNPs/rGO) as chloride ion Faradaic electrode and NaTi2(PO4)3/reduced graphene-oxide (NTP/rGO) as sodium ion Faradaic electrode. During the intercalation process, the sodium ions and chloride ions in the feed solution will be chemically intercalated into NTP/rGO electrode and AgNPs/rGO electrode, respectively. The DEDI system shows a stable and reversible salt removal capacity of 105 mg g−1 for 50 cycles with applied voltage range of −1.2–1.4 V. More importantly, when applying from 0 V to 1.4 V, although the removal capacity is relatively low (35.8 mg g−1), the energy recovery of this system is higher than 30% and the energy consumption is as low as 0.127 Wh g−1. Considering the brackish water used here is 2500 ppm, the energy consumption can be estimated to be 0.254 Wh L−1 for desalination of brackish water to drinkable water (500 ppm). The excellent performance of this DEDI system has made it a promising commercial technology for desalination of brackish water even seawater in the future.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Huang, Yinxi
Chen, Fuming
Guo, Lu
Zhang, Jun
Chen, Tupei
Yang, Hui Ying
format Article
author Huang, Yinxi
Chen, Fuming
Guo, Lu
Zhang, Jun
Chen, Tupei
Yang, Hui Ying
author_sort Huang, Yinxi
title Low energy consumption dual-ion electrochemical deionization system using NaTi2(PO4)3-AgNPs electrodes
title_short Low energy consumption dual-ion electrochemical deionization system using NaTi2(PO4)3-AgNPs electrodes
title_full Low energy consumption dual-ion electrochemical deionization system using NaTi2(PO4)3-AgNPs electrodes
title_fullStr Low energy consumption dual-ion electrochemical deionization system using NaTi2(PO4)3-AgNPs electrodes
title_full_unstemmed Low energy consumption dual-ion electrochemical deionization system using NaTi2(PO4)3-AgNPs electrodes
title_sort low energy consumption dual-ion electrochemical deionization system using nati2(po4)3-agnps electrodes
publishDate 2021
url https://hdl.handle.net/10356/150758
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