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Preparation method and application of novel chloride ion removal material Ti3C2Tx/Ag

A new type of chloride ion technology, applied in separation methods, nanotechnology for materials and surface science, chemical instruments and methods, etc., can solve the problems of less research on dechlorination electrodes, slow desalination rate, and low desalination capacity, etc Suitable for large-scale production, potential stability, high desalination capacity effect

Pending Publication Date: 2020-10-16
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, capacitive deionization and desodium electrodes (cathode) have been widely studied, but dechlorination electrodes (anode) are less studied, which limits its further development.
The currently researched dechlorination electrodes mainly include redox polymers, conductive polymers, MXene, Bi / BiOCl, and VOCl, etc. These materials have disadvantages such as poor stability, low desalination capacity, and slow desalination rate.

Method used

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  • Preparation method and application of novel chloride ion removal material Ti3C2Tx/Ag
  • Preparation method and application of novel chloride ion removal material Ti3C2Tx/Ag
  • Preparation method and application of novel chloride ion removal material Ti3C2Tx/Ag

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Effect test

Embodiment 1

[0048] The new chloride ion removal material Ti based on the battery-pseudocapacitive coupling mechanism of this embodiment 3 C 2 T x The preparation method of / Ag comprises the steps:

[0049] (1) Weigh 1g of LiF and add it to the hydrochloric acid solution (5mL of deionized water mixed with 15mL of 36%-38% concentrated hydrochloric acid) to obtain the first mixed solution, and heat it in a water bath at 40°C for 30min;

[0050] (2) Add Ti in the first mixed solution 3 AlC 2 , to obtain the second mixed solution, continue heating in a water bath at 40°C for 24h;

[0051] (3) Wash the second mixed solution obtained with absolute ethanol and deionized several times until the pH of the solution is greater than 5, and vacuum dry at 60° C. to obtain a sheet Ti 3 C 2 T x powder;

[0052] (4) Take 1g of the lamella Ti obtained above 3 C 2 T x Powder, dispersed in 250mL deionized water, ultrasonically stripped under Ar atmosphere for 1h, centrifuged at 3500rpm for 60min, t...

Embodiment 2

[0061] The new chloride ion removal material Ti based on the battery-pseudocapacitive coupling mechanism of this embodiment 3 C 2 T x The preparation method of / Ag comprises the steps:

[0062] (1) Preparation of 2mg / mL, 15mL few-layer Ti 3 C 2 T x solution;

[0063] (2) Weigh 25.39mg of AgNO 3 Dissolve the solid in 5mL deionized water, and add 138μL, 1mol / L hydrochloric acid solution drop by drop under ultrasonication to form AgCl colloid;

[0064] (3) Add the AgCl colloid obtained above to the few-layer Ti 3 C 2 T x solution, and then put the obtained mixture into a constant temperature shaker, and shake it at 25°C and 150rpm for 6h;

[0065] (4) vacuum filter and separate the reacted mixed solution, wash with deionized water, and then dry naturally at room temperature to obtain Ti 3 C 2 T x / Ag-6 film.

Embodiment 3

[0067] The new chloride ion removal material Ti based on the battery-pseudocapacitive coupling mechanism of this embodiment 3 C 2 T x The preparation method of / Ag comprises the steps:

[0068] (1) Preparation of 2mg / mL, 15mL few-layer Ti 3 C 2 T x solution;

[0069] (2) Weigh 25.39mg of AgNO 3 Dissolve the solid in 5mL deionized water, and add 138μL, 1mol / L hydrochloric acid solution drop by drop under ultrasonication to form AgCl colloid;

[0070] (3) Add the AgCl colloid obtained above to the few-layer Ti 3 C 2 T x solution, and then put the obtained mixture into a constant temperature shaker, and shake it at 25°C and 150rpm for 9h;

[0071] (4) vacuum filter and separate the reacted mixed solution, wash with deionized water, and then dry naturally at room temperature to obtain Ti 3 C 2 T x / Ag-9 film.

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Abstract

The invention discloses a preparation method and application of a novel chloride ion removal material Ti3C2Tx / Ag. The method includes: etching a block Ti3AlC2 to obtain laminar Ti3C2Tx-MXene; ultrasonically stripping the Ti3C2Tx-MXene solution, and taking a supernatant to obtain a few-lamella Ti3C2Tx-MXene solution; dissolving a certain amount of AgNO3 in deionized water, and adding a certain amount of hydrochloric acid under an ultrasonic condition to obtain an AgCl colloidal solution; adding the obtained AgCl colloid into the few-lamella Ti3C2Tx-MXene solution, and performing oscillation fora certain time under the conditions of constant temperature and constant rotating speed; and carrying out vacuum filtration and separation on the reacted mixed solution, performing washing with deionized water for several times, and conducting natural drying at room temperature to obtain the Ti3C2Tx / Ag film. An in-situ self-reduction technology is utilized, AgCl colloid is used as an oxidizing agent, Ti3C2Tx-MXene is used as a reducing agent, the loading capacity and the particle size of Ag are regulated and controlled by controlling the reaction time, and the synthesis method is simple and practicable; based on the battery effect (conversion reaction) of Ag nanoparticles and the pseudocapacitance behavior (ion intercalation) of Ti3C2Tx, the prepared and synthesized Ti3C2Tx / Ag film showsexcellent chloride ion removal capability and good desalination performance.

Description

technical field [0001] The invention belongs to the technical field of environmental material synthesis, and in particular relates to a novel chlorine ion removal material Ti 3 C 2 T x / Ag preparation method and its application in capacitive deionization and desalination. Background technique [0002] With the continuous development of industry and agriculture and the increase of population, the problem of water shortage has become increasingly prominent. The earth is rich in water resources in Shanghai. If the seawater is desalinated, it can provide sufficient water resources for human beings. Seawater mainly contains a large amount of salt, among which NaCl is the main component of seawater. At present, seawater desalination technologies mainly include thermal evaporation, electrodialysis, multi-stage flash evaporation, reverse osmosis and electrochemical oxidation, etc., but these technologies have defects such as high energy consumption, heavy pollution and high cost...

Claims

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Application Information

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IPC IPC(8): C01B32/921B22F9/24B82Y30/00C02F1/469C02F103/08
CPCC01B32/921B82Y30/00C02F1/4691B22F9/24C02F2103/08C01P2004/80C01P2002/72C01P2004/04C01P2006/40
Inventor 马杰梁明星王雷
Owner TONGJI UNIV
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