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High-performance tantalum disulfide two-dimensional layered film as well as preparation method and application thereof

A two-dimensional layered, tantalum disulfide technology, applied in the field of separation membranes, can solve problems such as environmental pollution, complex processes, and a large number of organic waste liquids, and achieve the effects of strong controllability, good repeatability, and high water flux

Inactive Publication Date: 2020-07-31
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of the above method is complicated, and a large amount of organic solvent is used, and a large amount of organic waste liquid will be generated during the membrane making process, which will pollute the environment

Method used

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  • High-performance tantalum disulfide two-dimensional layered film as well as preparation method and application thereof
  • High-performance tantalum disulfide two-dimensional layered film as well as preparation method and application thereof
  • High-performance tantalum disulfide two-dimensional layered film as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A high-performance TaS 2 A method for preparing a two-dimensional layered film, comprising the following steps:

[0028] Step 1. Take tantalum powder and sulfur powder and mix them well at a molar ratio of 1:2, add a small amount of iodine (the amount added is 3.5mg / cm2 based on the volume of the quartz tube) 3 ), in low vacuum (-3 Torr) was sealed in a quartz tube and placed in a muffle furnace. Slowly raise the temperature to 900°C at a heating rate of 50°C / h, keep it for 24 hours, and then quench to obtain high-purity 1T phase TaS 2 crystals, with CCl 4 and CS 2 Repeated washing 3 times in sequence to remove unreacted impurities.

[0029] Step 2, in the glove box, take 30mg of TaS prepared in step 1 2 Add the crystals into a stainless steel reaction kettle, then add 1 mL of n-butyllithium n-hexane solution with a concentration of 1.6 mol / L, and seal it. Lithium intercalation reaction was carried out at 100°C for 2 hours, and the product was washed with n-hexane...

Embodiment 2

[0036] A high-performance TaS 2 A method for preparing a two-dimensional layered film, comprising the following steps:

[0037] Step 1. Take tantalum powder and sulfur powder and mix them evenly at a molar ratio of 1:2, add a small amount of iodine (the amount added is 4mg / cm2 based on the volume of the quartz tube) 3 ), in low vacuum (-3 Torr) was sealed in a quartz tube and placed in a muffle furnace. Slowly raise the temperature to 900°C at a heating rate of 30°C / h, keep it for 72 hours, and then quench to obtain high-purity 1T phase TaS 2 crystals, with CCl 4 and CS 2 Repeated washing 3 times in sequence to remove unreacted impurities.

[0038] Step 2, in the glove box, take 50mg of TaS prepared in step 1 2 Add the crystals into a stainless steel reaction kettle, then add 1 mL of n-butyllithium n-hexane solution with a concentration of 1.6 mol / L, and seal it. Lithium intercalation reaction was carried out at 60°C for 12 hours, and the product was repeatedly washed wi...

Embodiment 3

[0043] A high-performance TaS 2 A method for preparing a two-dimensional layered film, comprising the following steps:

[0044] Step 1. Take tantalum powder and sulfur powder and mix them well at a molar ratio of 1:2, add a small amount of iodine (the amount added is 2 mg / cm2 based on the volume of the quartz tube) 3 ), in low vacuum (-3 Torr) was sealed in a quartz tube and placed in a muffle furnace. Slowly raise the temperature to 900°C at a heating rate of 45°C / h, keep it for 48 hours, and then quench to obtain high-purity 1T phase TaS 2 crystals, with CCl 4 and CS 2 Washing was repeated 5 times successively to remove unreacted impurities.

[0045] Step 2, in the glove box, take 40mg of TaS prepared in step 1 2 Add the crystals into a stainless steel reaction kettle, then add 1 mL of n-butyllithium n-hexane solution with a concentration of 1.6 mol / L, and seal it. Lithium intercalation reaction was carried out at 150°C for 1 h, and the product was washed 5 times with ...

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Abstract

The invention discloses a high-performance tantalum disulfide two-dimensional layered film as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing a LixTaS2 crystal from a 1T-phase TaS2 crystal through a lithium intercalation reaction, carrying out ultrasonic dispersion on the LixTaS2 crystal to obtain a TaS2 nanosheet dispersion liquid, and finally depositing the dispersion liquid on a porous carrier to obtain the TaS2 two-dimensional layered film. The TaS2 two-dimensional layered film disclosed by the invention can be fixed ina separation device so as to separate nano impurities with different sizes and properties in water, is high in separation efficiency, high in water flux and good in stability, and has a wide application prospect.

Description

technical field [0001] The present invention relates to a kind of high-performance TaS 2 The two-dimensional layered membrane and its preparation method and application belong to the technical field of separation membrane. Background technique [0002] The continuous development and innovation of global science and technology and the rapid development of industrial economy inevitably lead to the rapid aggravation of water pollution. The problem of high-efficiency, energy-saving and environmental protection to deal with water pollution has attracted widespread attention. Membrane separation technology is an efficient and energy-saving chemical separation method, and is considered to be an important means to deal with water resource crisis and sewage treatment. Traditional membrane materials have disadvantages such as poor stability, low mechanical strength, and weak separation performance, while two-dimensional ultra-thin nanomaterials have unique properties and functions du...

Claims

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Application Information

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IPC IPC(8): C01G35/00
CPCC01G35/00C01P2004/04C01P2004/03C01P2002/84
Inventor 冉瑾黄强吴玉莹张朋朋
Owner HEFEI UNIV OF TECH
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