Simultaneous capacitive deionisation and disinfection of saltwater by Ag@C/rGO electrodes

W. T. Chang, P. A. Chen, W. R. Chen, S. H. Liu, H. Paul Wang

研究成果: Article同行評審

摘要

Capacitive deionisation (CDI) of saltwater, with the advantages of low energy consumption and being environmentally friendly, has been considered a potential solution to the scarcity of fresh water from sea, contaminated or waste waters. In the present work, Ag@C core-shell nanoparticle dispersed rGO (Ag@C/rGO) electrodes were synthesised and used for the CDI of saltwater. To better understand the formation mechanism of the Ag@C core-shell nanoparticles, temperature-programmed carbonisation of the Ag+-β-cyclodextrin complexes was studied by in situ synchrotron small-Angle X-ray scattering spectroscopy. At 573 K, the core Ag metal forms Ag@C core-shell nanoparticles with the highest probability nanosizes of 40-80 nm. In the 4-cycle flow-by CDI (once through) experiments using the Ag@C/GO electrodes, high electrosorption efficiencies (25.0-44.9%) were obtained. Each CDI cycle involving electrosorption at 1.2 V and regeneration at 0 V for 1 h was highly reversible. In addition, the disinfection efficiency of the Ag@C/rGO electrodes, contributed by both silver and rGO, was very high (>97%). This study shows that the easily synthesised Ag@C/rGO core-shell carbon-based electrodes are feasible for simultaneous deionisation and disinfection of saltwater as a potential source of drinking water.

原文English
頁(從 - 到)352-359
頁數8
期刊Environmental Chemistry
18
發行號8
DOIs
出版狀態Published - 2022 4月

All Science Journal Classification (ASJC) codes

  • 化學(雜項)
  • 環境化學
  • 地球化學與岩石學

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