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Issue 5, 2018
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Ultrahigh performance of novel energy-efficient capacitive deionization electrodes based on 3D nanotubular composites

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Abstract

Capacitive deionization (CDI) is being progressed as an auspicious ion removal technique from brackish and seawater. Herein, we introduce a novel one-step facile chemical approach to fabricate tubular architectured composite electrodes made of both Titania and Multiwalled carbon nanotubes (TNTs/MWCNTs). The composites have been exploited, for the first time, as electrode materials for capacitive deionization. The composite electrodes were fully characterized via Field Emission Scanning Electron Microscopy (FESEM), Raman spectroscopy, X-ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS) techniques, and Nitrogen Sorption. The electrochemical response was investigated by using Cyclic Voltammetry (CV), Galvanostatic Charge and Discharge (GCD), and Potentio-Electrochemical Impedance Spectroscopy (PEIS) measurements. The fabricated composite electrodes containing 5 wt% TiO2 nanotubes showed remarkable specific capacitance, conductivity, reversibility, and durability compared to pristine MWCNTs and other MWCNT-based composite electrodes reported in the literature. The desalination capability of the composite electrode was investigated using batch mode operation. The electrosorption capacity of the composite electrode containing 5 wt% TiO2 nanotubes (13.2 mg gāˆ’1) is approximately two fold larger than that of pristine MWCNTs (7.7 mg gāˆ’1), indicating an improved desalination efficiency. Therefore, the fabricated TNT/MWCNT composite electrode is a promising candidate for CDI technology.

Graphical abstract: Ultrahigh performance of novel energy-efficient capacitive deionization electrodes based on 3D nanotubular composites

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Publication details

The article was received on 07 Oct 2017, accepted on 18 Jan 2018 and first published on 19 Jan 2018


Article type: Paper
DOI: 10.1039/C7NJ03838K
Citation: New J. Chem., 2018,42, 3560-3567
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    Ultrahigh performance of novel energy-efficient capacitive deionization electrodes based on 3D nanotubular composites

    M. Ramadan, H. M. A. Hassan, A. Shahat, R. F. M. Elshaarawy and N. K. Allam, New J. Chem., 2018, 42, 3560
    DOI: 10.1039/C7NJ03838K

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