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A method for preparing two-dimensional nanomaterials using liquid ammonia/alkali metal solution

A technology of two-dimensional nanomaterials and alkali metals, applied in the direction of non-metallic elements, chemical instruments and methods, binary selenium/tellurium compounds, etc., can solve the problems of difficult control of the intercalation process and low product yield, and achieve high yield High, fast response, simple method effect

Active Publication Date: 2016-02-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low product yield and difficult control of the intercalation process obtained by the existing two-dimensional nanomaterial preparation method, and provide a method for preparing two-dimensional nanomaterials using liquid ammonia / alkali metal solution

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  • A method for preparing two-dimensional nanomaterials using liquid ammonia/alkali metal solution
  • A method for preparing two-dimensional nanomaterials using liquid ammonia/alkali metal solution
  • A method for preparing two-dimensional nanomaterials using liquid ammonia/alkali metal solution

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specific Embodiment approach 1

[0021] Specific implementation mode 1: In this implementation mode, the method for preparing two-dimensional nanomaterials using liquid ammonia / alkali metal solution is realized according to the following steps:

[0022] 1. Weigh the alkali metal and layered compound in a molar ratio of 1: (1 to 10) under the protection of an inert gas, and then put it into a quartz tube;

[0023] 2. Vacuum the quartz tube to 10 -4 After Pa, fill the ammonia gas with a purity of 99.9999%, then cool the quartz tube until the ammonia gas in the tube is liquefied, and the alkali metal dissolves in the liquid ammonia to make the liquid ammonia solution appear blue;

[0024] 3. Oscillating the quartz tube, continuously cooling the quartz tube during the process of oscillating the quartz tube, oscillating until the blue color of the liquid ammonia solution fades, then vaporizing the liquid ammonia at room temperature and extracting it to obtain a layered compound after intercalation;

[0025] 4. Pu...

specific Embodiment approach 2

[0031] Embodiment 2: This embodiment differs from Embodiment 1 in that the purity of the alkali metal described in Step 1 is not less than 99.9%. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0032] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the purity of the layered compound described in Step 1 is not less than 99.9%. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention provides a method for preparing a two-dimensional nanomaterial by utilizing a liquid ammonia / alkali metal solution and relates to a preparation method of a two-dimensional nanomaterial. The invention aims to solve the problems that a product obtained by the existing preparation method of the two-dimensional nanomaterial has low yield and the intercalation process is difficult to control. The preparation method comprises the following steps: 1, placing weighed alkali metal and lamellar compounds into a quartz tube; 2, vacuumizing the quartz tube, introducing high-purity amminia gas and cooling until the ammonia gas in the tube is liquefied; 3, oscillating the quartz tube until the blue color of the liquid ammonia solution is faded and extracting vaporized liquid ammonia; 4, placing the lamellar compounds after intercalation into deionized water and performing ultrasonic treatment; and 5, placing the nanomaterial aqueous solution in the step 4 into a centrifugal machine, centrifuging and collecting a supernate liquid to obtain the two-dimensional nanomaterial. The yield of the two-dimensional nanomaterial obtained by the preparation method provided by the invention can reach 80 percent, and the intercalation process of alkali metal ions on the lamellar compounds is effectively controlled by observing the process that the color of the liquid ammonia solution is gradually changed from blue to colorless.

Description

technical field [0001] The invention relates to a preparation method of a two-dimensional nanometer material. Background technique [0002] Two-dimensional nanomaterials have received widespread attention due to their important theoretical and application values. In the case of graphene, which consists of a single layer of carbon atoms, this material exhibits high electron mobility (200,000 cm 2 V -1 S -1 ), ultra-fast Fermi velocity (~1.0×10 8 m / s), high thermal conductivity (5000W / m K) and high Young's modulus (1.0×10 14 Pa) and other excellent properties, it has a wide range of applications in many fields such as nanoelectronics, photodetectors, supercapacitors and catalysis. Another typical two-dimensional nanomaterial is monolayer or multilayer molybdenum disulfide. Its excellent structure and electrical properties make it have important application prospects in energy storage and catalysis. Therefore, it is hoped to develop more 2D nanomaterials to investigate th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04C01G39/06C01G41/00C01G23/00C01B19/04C07D487/22C01B32/225
Inventor 韩杰才宋波银颖张宇民
Owner HARBIN INST OF TECH