Dual ion desalting electrode and preparation method thereof

Abstract

The invention discloses a dual-ion desalination electrode and a preparation method thereof. The MXene@NTO composite material is used as the negative electrode material, and the NiCo‑Ox@graphene composite material or bamboo shoot leaf carbonized material is used as the positive electrode material. The component of the MXene@NTO is Ti 3 C 2 @Na 4 Ti 5 o 12 &Na 4 Ti 9 o 20 , which is prepared by the following steps: according to the amount of adding at least 10ml of NaOH solution per 0.1g of MXene, adding MXene to NaOH solution with a concentration of 1-10mol / L, hydrothermal reaction at 100-300°C for 1-6h, static Cool naturally to room temperature; filter the resulting reaction product, wash it with deionized water at least twice, and vacuum-dry it at 30-80°C for at least 10 hours to obtain the MXene@NTO composite material. The desalination electrode prepared by the invention has the desalination performance of regular pore structure, high effective surface area, high desalination capacity, high desalination rate and low energy consumption, and can be applied to the preparation of dual-ion capacitor desalination electrodes, assembled into dual-ion desalination batteries and applied to water Environmental treatment, fast and efficient removal of Na in water environment + , Cl ‑ , SO 4 2‑ , F ‑ , providing a new route for low-energy, high-performance desalination.

Description

technical field [0001] The invention belongs to the technical field of dual-ion capacitor desalination, and in particular relates to a preparation method of a dual-ion desalination electrode. Background technique [0002] With the rapid growth of population and the continuous expansion of industrialization process, the shortage of fresh water has become one of the biggest threats to human beings. Desalination of seawater and brackish water is a viable option for addressing freshwater supply. [0003] Seawater desalination is the use of seawater desalination to produce fresh water. Seawater desalination methods currently used include seawater freezing method, electrodialysis method, distillation method, reverse osmosis method, and ammonium carbonate ion exchange method. Currently, reverse osmosis membrane method and distillation method are the most popular in the market mainstream. Among them, the distillation method has high energy consumption, and the reverse osmosis memb...

AI Technical Summary

Problems solved by technology

However, the symmetric capacitive deionization method using carbon-based electrodes has disadvantages such as complex pore structure, low effective surface area, double layer overlap effect, poor desalination efficiency, and low charge efficiency.

Images