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Method for preparing nanocomposite by using two-dimensional transition metal chalcogenide nanosheets and metal

A technology of transition metal chalcogenides and nanocomposites, applied in the preparation of sulfide/polysulfide, binary selenium/tellurium compounds, nanotechnology for materials and surface science, etc., can solve the problem of silver disulfide that cannot be realized Molybdenum composite materials can control the problems of preparation and complex operation, and achieve the effects of easy processing, good water dispersion and easy operation

Inactive Publication Date: 2014-01-01
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the operation of this method is complicated and the controllable preparation of silver-molybdenum disulfide composites cannot be achieved.

Method used

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  • Method for preparing nanocomposite by using two-dimensional transition metal chalcogenide nanosheets and metal
  • Method for preparing nanocomposite by using two-dimensional transition metal chalcogenide nanosheets and metal
  • Method for preparing nanocomposite by using two-dimensional transition metal chalcogenide nanosheets and metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (a) MoS 2 Preparation of nanosheets

[0034] Add 800 mg of MoS to a 50 mL Schlenk tube 2 , Remove the air in the reaction tube with high-purity argon, then seal it, and slowly add 25 mL of n-butyllithium solution dropwise. After stirring at room temperature for 48 h, stop the reaction and let it stand for 2 to 4 h, remove the n-butyllithium solution in the upper part of the reaction tube, and convert the obtained single-layer or several-layer MoS 2 The nanosheets are dispersed in aqueous solution. Centrifugal purification to obtain a certain concentration of water-soluble MoS 2 Nanosheets.

[0035] (b) Preparation of reducing agent and stabilizer

[0036] Add 176.14 mg of ascorbic acid (AA) and 10 mL of ultrapure water to a 20 mL sample bottle to obtain a 100 mmol / L reducing agent solution; add 264.2 mg of sodium carboxymethylcellulose (CMC) to a 20 mL sample bottle, 10 mL of ultrapure water to obtain a 100 mmol / L stabilizer solution.

[0037] (c) Preparation of ...

Embodiment 2

[0042] (a) MoS 2 Preparation of nanosheets

[0043] Add 800 mg of MoS to a 50 mL Schlenk tube 2 , Remove the air in the reaction tube with high-purity argon, then seal it, and slowly add 25 mL of n-butyllithium solution dropwise. After stirring at room temperature for 48 h, stop the reaction and let it stand for 2 to 4 h, remove the n-butyllithium solution in the upper part of the reaction tube, and convert the obtained single-layer or several-layer MoS 2 The nanosheets are dispersed in aqueous solution. Centrifugal purification to obtain a certain concentration of water-soluble MoS 2 Nanosheets.

[0044] (b) Preparation of reducing agent and stabilizer

[0045] Add 176.14 mg of ascorbic acid (AA) and 10 mL of ultrapure water to a 20 mL sample bottle to obtain a 100 mmol / L reducing agent solution; add 264.2 mg of sodium carboxymethylcellulose (CMC) to a 20 mL sample bottle, 10 mL of ultrapure water to obtain a 100 mmol / L stabilizer solution.

[0046] (c) Preparation of ...

Embodiment 3

[0051] (a) MoS 2 Preparation of nanosheets

[0052] Add 800 mg of MoS to a 50 mL Schlenk tube 2 , Remove the air in the reaction tube with high-purity argon, then seal it, and slowly add 25 mL of n-butyllithium solution dropwise. After stirring at room temperature for 48 h, stop the reaction and let it stand for 2 to 4 h, remove the n-butyllithium solution in the upper part of the reaction tube, and convert the obtained single-layer or several-layer MoS 2 The nanosheets are dispersed in aqueous solution. Centrifugal purification to obtain a certain concentration of water-soluble MoS 2 Nanosheets.

[0053] (b) Preparation of reducing agent and stabilizer

[0054] Add 176.14 mg of ascorbic acid (AA) and 10 mL of ultrapure water to a 20 mL sample bottle to obtain a 100 mmol / L reducing agent solution; add 264.2 mg of sodium carboxymethylcellulose (CMC) to a 20 mL sample bottle , 10 mL of ultrapure water to obtain a 100 mmol / L stabilizer solution.

[0055] (c) Preparation of...

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Abstract

The invention relates to a method for preparing a nanocomposite by using two-dimensional transition metal chalcogenide nanosheets and metal, and belongs to the field of nanomaterial synthesis. The method mainly includes adding a reducing agent and a stabilizing agent into monolayer or multi-layer two-dimensional transition metal chalcogenide nanosheet aqueous dispersion obtained after chemical intercalation, then injecting a certain amount of metal salt solution, and preparing the metal nanocomposite based on monolayer or few-layer two-dimensional transition metal chalcogenide nanosheets on the conditions of ice bath, hydrothermal method, microwaves, ultrasound and the like. In the composite, metal nanoparticles can be evenly distributed on the surfaces of the nanosheets, and the obtained composite can be evenly dispersed in water, and can be used in the solution phase and further processed. Through compositing of the metal nanoparticles, photoelectric property of two-dimensional transition metal chalcogenide can be improved, and the nanocomposite has good application prospects in the fields of supercapacitors, fuel cells and biosensors based on surface enhanced Raman detection, and the like.

Description

technical field [0001] The invention belongs to a method for preparing nanometer materials, in particular to a method for preparing nanocomposite materials by using two-dimensional transition metal chalcogenide nanosheets and metals. Background technique [0002] Since 2004, new two-dimensional nanomaterials represented by graphene have caused a global research boom, and have shown great application potential in optoelectronics, biology, energy and other fields. However, as a semimetal, graphene lacks an energy band gap, which affects its application in important fields such as optoelectronics. Two-dimensional transition metal dichalcogenides (2D TMDCs) are a class of compounds with a layered structure, such materials have MX 2 The chemical formula, where M represents metals, including Ti, Zr, Ha, V, Nb, Ta, Cr, Mo, W, X represents chalcogen elements, generally S, Se, Te. Its typical structure is that the atoms of the chalcogen element sandwich the atoms of the transition ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24C01B17/20C01B19/04B82Y30/00B82Y40/00
Inventor 汪联辉宇文力辉徐菲翁立星
Owner NANJING UNIV OF POSTS & TELECOMM
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