Preparation method of ionic intercalation type two-dimensional material

A technology of two-dimensional materials and ions, which is applied in the field of preparation of ion-intercalated two-dimensional materials, can solve the problems of hindering commercial production, complicated preparation process, long reaction time, etc., and achieves low preparation cost and simple sample cleaning process Effect

Active Publication Date: 2017-05-10
HUAZHONG UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

The exfoliation method can quickly exfoliate bulk materials with a two-dimensional structure to produce nanosheets, but usually the yield is low, and the quality of the synthesized two-dimensional materials is not uniform; It is an effective method for two-dimensional materials with controllable thickness, but the expensive cost and complicated preparation process have greatly hindered its commercial production; wet chemical methods usually use additives such as surfactants to assist in the synthesis of two-dimensional materials. Materials can be prepared in a large area, but the reaction time is relatively long and organic impurities need to be removed in the later stage; to achieve rapid and efficient preparation of large-area and high-quality two-dimensional materials, especially ion intercalation type two-dimensional materials, is still a challenge. a big challenge

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  • Preparation method of ionic intercalation type two-dimensional material
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  • Preparation method of ionic intercalation type two-dimensional material

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preparation example Construction

[0020] The preparation method of the ion intercalation type two-dimensional material provided in the example uses a salt with a low melting point as a molten salt and a metal salt as a precursor, reacts at a specific temperature for a certain period of time, and after cooling to room temperature, rinses and extracts the material with deionized water. Filtration, to obtain ion intercalation type two-dimensional material powder; specifically include the following steps:

[0021] (1) Put the salt with low melting point in the muffle furnace, and the furnace temperature is set between the melting point of the salt and its decomposition temperature or boiling point, so that the salt becomes molten; the types of molten salt include but are not limited to: nitrate, chlorination Salt, sulfate, phosphate;

[0022] (2) adding the metal salt precursor to the molten salt for reaction; wherein, the metal element types of the metal salt include but are not limited to: Al, Ca, Ti, V, Cr, Mn,...

Embodiment 1

[0028] (1) Add 5g NaNO 3 Place in a crucible, place the crucible in a muffle furnace, and heat at 350°C for ten minutes until NaNO 3 become molten

[0029] (2) 0.2g MnSO 4 The powder is quickly added to the above molten NaNO 3 , respond for 10 seconds;

[0030] (3) The product after the reaction is naturally lowered to room temperature, and is cleaned and suction-filtered with deionized water to remove the salt therein;

[0031] (4) Dry the cleaned sample at 80°C to obtain two-dimensional Na 0.55 mn 2 o 4 1.5H 2 O nanosheets.

Embodiment 2

[0033] (1) 5g KNO 3 Place in a crucible, place the crucible in a muffle furnace, and heat at 380°C for ten minutes to KNO 3 become molten

[0034] (2) 0.2g MnSO 4 The powder is quickly added to the above molten KNO 3 , react for one minute;

[0035] (3) The product after the reaction is naturally lowered to room temperature, and is cleaned and suction-filtered with deionized water to remove the salt therein;

[0036] (4) Dry the cleaned sample at 80°C to obtain a two-dimensional K 0.27 MnO 2 0.54H 2 O nanosheets.

[0037] The two-dimensional cation intercalation type metal oxide material K prepared in Example 2 0.27 MnO 2 0.54H 2 SEM images of O nanosheets as figure 2 As shown, it can be seen from the figure that the prepared two-dimensional material has a uniform morphology and no other morphology such as nanoparticles.

[0038] Such as image 3 Shown is the two-dimensional cation intercalation type metal oxide material K prepared in Example 2 0.27 MnO 2 0.54H...

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Abstract

The invention discloses a preparation method of an ionic intercalation type two-dimensional material. The preparation method comprises the following steps: enabling salt to be in a molten state at preset temperature by using a molten-salt growth method; adding a metal salt precursor in molten salt; and reacting for preset time and taking out, cooling, cleaning, carrying out suction filtering and drying to obtain the ionic intercalation type two-dimensional material. Positive ion intercalation type two-dimensional metallic oxide and negative ion intercalation type two-dimensional metal hydroxide can be prepared; types of positive ions and negative ions in the prepared two-dimensional material can be regulated and controlled by materials of the molten salt and metal salt; another ionic intercalation type two-dimensional material can also be prepared by the method; and the prepared ionic intercalation type two-dimensional material has quite large application prospect in the aspects of energy storage, catalysis, ion exchange and the like.

Description

technical field [0001] The invention belongs to the field of preparation of nanometer two-dimensional materials, and more specifically relates to a preparation method of ion intercalation type two-dimensional materials. Background technique [0002] Two-dimensional materials have many special physical and chemical properties due to their atomic layer thickness and the ability to expose more atoms, and are therefore widely used in superconductivity, field effect transistors, electrocatalysis and energy storage. [0003] At present, the synthesis methods of 2D materials mainly include exfoliation method, chemical vapor deposition method and wet chemical method. The exfoliation method can quickly exfoliate bulk materials with a two-dimensional structure to produce nanosheets, but usually the yield is low, and the quality of the synthesized two-dimensional materials is not uniform; It is an effective method for two-dimensional materials with controllable thickness, but the expe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B13/14
CPCC01B13/14C01P2002/01C01P2002/08C01P2002/72C01P2004/03C01P2004/04
Inventor 周军胡志觅肖旭黄亮
Owner HUAZHONG UNIV OF SCI & TECH
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