High performance stability of titania decorated carbon for desalination with capacitive deionization in oxygenated water

Abstract

Decoration of the surface of carbon nanoparticles with titania leads to a highly stable desalination capacity during capacitive deionization (CDI) operation in oxygenated saline solution.

Tunable Pseudocapacitive Behavior in Metal–Organic Framework-Derived TiO2@Porous Carbon Enabling High-Performance Membrane Capacitive Deionization

“…The increased content of oxygen vacancy is associated with the redox reaction of TiO 2 , anode oxidation, and formation of oxygen functional groups on the electrodes after the long-time cycling. 75,76,17,77 It is shown that the fraction of oxygen vacancies of TiO 2 @PC-600 is the smallest among the three electrodes, suggesting that the anatase TiO 2 may be capable of alleviating the formation of oxygen-containing surface function groups, favorable for long-term stability. 77 This new understanding on the desalination mechanism and interfacial reaction is expected to promote the rational design of highperformance TiO 2 -based electrodes for CDI applications.…”

Rapid Inversion of Surface Charges in Heteroatom‐Doped Porous Carbon: A Route to Robust Electrochemical Desalination

“…In order to improve the long‐term stability of CDI systems employing AC electrodes, compositional modifications of the electrode materials have been carried out. Choosing an appropriate binder or introducing ion exchange resins or oxide materials could reduce undesirable Faradaic reactions. Furthermore, functionalization with redox‐polymers has shown to significantly suppress parasitic Faradaic reactions, by providing a more favorable Faradaic process that can be utilized for ion‐binding, thus enhancing molecular selectivity and adsorption capacity .…”

A review of modification of carbon electrode material in capacitive deionization

“…Cycling stability of CDI is challenged with peroxide formation and rapid oxidation of anodic electrode. 82 To overcome this issue, Srimuk et al 83 presented a strategy by hybridizing nano-carbon particles with solgel-derived TiO 2 . This carbon/metal oxide hybrid showed 90% of the initial electrosorption capacity after 100 cycles, indicating an outstanding cycling stability.…”