Prussian blue analogue/titanium tricarbon 2 composite material as well as preparation method and application thereof

Abstract

The invention discloses a Prussian blue analogue / titanium tricarbon 2 composite material as well as a preparation method and application thereof. The method is based on the principle that a Faraday capacitor and a double-electric-layer capacitor store charges. In a capacitive deionization device, under the condition of certain voltage, the Prussian blue analogue / titanium tricarbon 2 composite material is used as a Faraday capacitor to adsorb sodium ions, and the other electrode takes activated carbon as a double-electric-layer capacitor to adsorb chloride ions, so that sodium chloride is removed, and the purpose of desalting is achieved. Cyclic adsorption and desorption of the material on chloride ions and sodium ions can be achieved by controlling the magnitude of applied voltage and adjusting the positive electrode and the negative electrode, operation is easy, secondary pollution is avoided, and assistance of other chemical substances is not needed. The sodium chloride adsorption capacity of a hybrid capacitive deionization device composed of the titanium tricarbon derived sodium titanate / graphene composite material and the activated carbon electrode can reach 102.13 mg.g <-1 >, and the method is a desalination method with great prospects.

Description

technical field [0001] The invention belongs to the technical field of high-energy electrochemistry. Background technique [0002] With the rapid increase of the world's population and the gradual intensification of environmental pollution, human beings are facing a severe crisis of drinking water safety. In addition, my country is also facing more and more serious water shortage problems. According to relevant data, my country's per capita fresh water possession is only 2,200 cubic meters, ranking 121st in the world, less than one-third of the world's per capita water resources, and one of the 13 countries with the most scarce per capita water resources in the world. However, my country's water consumption has maintained a high level for a long time, and water pollution has increased the proportion of brackish water, which has led to a severe shortage of water resources in my country. [0003] In response to the shortage of drinking water resources, the most commonly used...

AI Technical Summary

Problems solved by technology

However, traditional carbon-based electrodes often have problems such as long-term cycle prone to electrode oxidation, adsorption capacity is affected by the specific surface area of ​​the material, and common ion efficiency affects charge efficiency. Therefore, new electrode materials are urgently needed for the desalination process.

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