Capacitive Deionization of Saline Water by Using MoS2-Graphene Hybrid Electrodes with High Volumetric Adsorption Capacity

Jinlong Han; Tingting Yan; Junjie Shen; Liyi Shi; Jianping Zhang; Dengsong Zhang

doi:10.1021/acs.est.9b04274

Capacitive Deionization of Saline Water by Using MoS₂-Graphene Hybrid Electrodes with High Volumetric Adsorption Capacity

Jinlong Han, Tingting Yan, Junjie Shen, Liyi Shi, Jianping Zhang, Dengsong Zhang

Shanghai University

Research output: Contribution to journal › Article › peer-review

209 Citations (SciVal)

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Abstract

Capacitive deionization (CDI) has received wide attention as an emerging water treatment technology because of its low energy consumption, low cost, and high efficiency. However, the conventional carbon electrode materials for CDI have low densities, which occupy large volumes and are disadvantageous for use in limited space (e.g., in household or on offshore platforms). In order to miniaturize the CDI device, it is quite urgent to develop high volumetric adsorption capacity (VAC) electrode materials. To overcome this issue, we rationally designed and originally developed high VAC MoS₂-graphene hybrid electrodes for CDI. It is interesting that MoS₂-graphene hybrid electrode has a much higher NaCl VAC of 14.3 mg/cm³ with a gravimetric adsorption capacity of 19.4 mg/g. It has been demonstrated that the adsorption capacity is significantly enhanced because of the rapid ion transport of MoS₂ and high electrical conductivity of graphene. In situ Raman spectra and high-angle annular dark-field scanning transmission electron microscopy tests demonstrated a favorable Faradaic reaction, which was crucial to enhancing the NaCl VAC of the MoS₂-graphene hybrid electrode. This work opens a new avenue for miniaturizing future CDI devices.

Original language	English
Pages (from-to)	12668-12676
Number of pages	9
Journal	Environmental Science and Technology
Volume	53
Issue number	21
Early online date	18 Sept 2019
DOIs	https://doi.org/10.1021/acs.est.9b04274
Publication status	Published - 5 Nov 2019

Funding

This work was supported by the National Key R&D Program of China (2017YFB0102200), the National Natural Science Foundation of China (21722704 and 21906101), and the Science and Technology Commission of Shanghai Municipality (16DZ1204300, 15DZ2281400 and 16JC1401700). We are grateful to Dr. Lupeng Han and Dr. Zaheen Ullah Khan for providing the helpful guidance. We are grateful to Dr. Hu Pengfei and Dr. Peng Jianchao, Test Center of Shanghai University, for providing the helpful guidance.

ASJC Scopus subject areas

General Chemistry
Environmental Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acs.est.9b04274

Revised-Manucript-HJL-Sep15.pdf
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Environ. Sci. Technol., copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acs.est.9b04274
Accepted author manuscript, 2.17 MB

Cite this

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title = "Capacitive Deionization of Saline Water by Using MoS2-Graphene Hybrid Electrodes with High Volumetric Adsorption Capacity",

abstract = "Capacitive deionization (CDI) has received wide attention as an emerging water treatment technology because of its low energy consumption, low cost, and high efficiency. However, the conventional carbon electrode materials for CDI have low densities, which occupy large volumes and are disadvantageous for use in limited space (e.g., in household or on offshore platforms). In order to miniaturize the CDI device, it is quite urgent to develop high volumetric adsorption capacity (VAC) electrode materials. To overcome this issue, we rationally designed and originally developed high VAC MoS2-graphene hybrid electrodes for CDI. It is interesting that MoS2-graphene hybrid electrode has a much higher NaCl VAC of 14.3 mg/cm3 with a gravimetric adsorption capacity of 19.4 mg/g. It has been demonstrated that the adsorption capacity is significantly enhanced because of the rapid ion transport of MoS2 and high electrical conductivity of graphene. In situ Raman spectra and high-angle annular dark-field scanning transmission electron microscopy tests demonstrated a favorable Faradaic reaction, which was crucial to enhancing the NaCl VAC of the MoS2-graphene hybrid electrode. This work opens a new avenue for miniaturizing future CDI devices.",

author = "Jinlong Han and Tingting Yan and Junjie Shen and Liyi Shi and Jianping Zhang and Dengsong Zhang",

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AU - Shi, Liyi

AU - Zhang, Jianping

AU - Zhang, Dengsong

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