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Preparation method and application of aerogel vanadium disulphide

A vanadium disulfide, nanomaterial technology, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve the problems of low specific surface area, easy mixing of impurities, low specific capacity, etc., to achieve large specific surface area, avoid stacking, The effect of high specific capacity

Inactive Publication Date: 2018-12-18
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the methods for synthesizing vanadium disulfide mainly include solid-phase method and hydrothermal method. The solid-phase method has the disadvantages of high energy consumption, low efficiency, and easy mixing of impurities. The hydrothermal method has the advantages of simple operation, low energy consumption and little pollution.
However, the vanadium disulfide nanoflowers synthesized by the existing hydrothermal method are prone to stacking or stacking, resulting in low specific surface area and low specific capacity when used as supercapacitor electrode materials.

Method used

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  • Preparation method and application of aerogel vanadium disulphide
  • Preparation method and application of aerogel vanadium disulphide
  • Preparation method and application of aerogel vanadium disulphide

Examples

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Effect test

Embodiment 1

[0025] The preparation method of the airgel-like vanadium disulfide nanomaterial in this embodiment comprises the following steps:

[0026] (1) Weigh 3mmol of ammonium metavanadate and dissolve it in 40ml of deionized water to remove oxygen, add 1ml of ammonia water, stir the solution magnetically until the solution becomes uniform and transparent, then add 15mmol of thioacetamide and continue magnetically stirring for 30 minutes to obtain a uniform solution .

[0027] (2) The uniform solution obtained is transferred to the polytetrafluoroethylene lining of the stainless steel autoclave, tightened and placed in a blast drying oven, and obtained a reaction mixture at 160 degrees Celsius for 24 hours, and the stainless steel autoclave was naturally cooled to After room temperature, the supernatant was removed and the reaction mixture was transferred to a beaker.

[0028] (3) The above reaction mixture was washed three times with deionized water and ethanol respectively, filtere...

Embodiment 2

[0033] The preparation method of the airgel-like vanadium disulfide nanomaterial in this embodiment includes the following steps:

[0034] (1) Weigh 1mmol of ammonium metavanadate and dissolve it in 40ml of deionized water to remove oxygen and add 1.5ml of ammonia water, stir the solution magnetically until the solution becomes uniform and transparent, then add 10mmol of thioacetamide and continue magnetic stirring for 40 minutes to obtain a uniform solution.

[0035] (2) The uniform solution obtained is transferred to the polytetrafluoroethylene lining of the stainless steel autoclave, tightened and placed in a blast drying oven, and obtained a reaction mixture at 150 degrees Celsius for 25 hours, and the stainless steel autoclave was naturally cooled to After room temperature, the supernatant was removed and the reaction mixture was transferred to a beaker.

[0036] (3) The above reaction mixture was washed three times with deionized water and ethanol respectively, filtered...

Embodiment 3

[0041] The preparation method of the airgel-like vanadium disulfide nanomaterial in this embodiment includes the following steps:

[0042] (1) Weigh 2mmol of ammonium metavanadate and dissolve it in 40ml of deionized water to remove oxygen and add 1ml of ammonia water, stir the solution magnetically until the solution becomes uniform and transparent, then add 12mmol of thioacetamide and continue magnetically stirring for 50 minutes to obtain a uniform solution .

[0043] (2) The homogeneous solution obtained is transferred to the polytetrafluoroethylene lining of the stainless steel autoclave, tightened and placed in a blast drying oven, and obtained a reaction mixture at 140 degrees Celsius for 24 hours, and the stainless steel autoclave was naturally cooled to After room temperature, the supernatant was removed and the reaction mixture was transferred to a beaker.

[0044] (3) The above reaction mixture was washed three times with deionized water and ethanol respectively, f...

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Abstract

The invention discloses a preparation method and application of aerogel vanadium disulphide. According to the preparation method, firstly, ammonium metavanadate is used as a vanadium source; thioacetamide is used as a sulphur source; the PH value is regulated by ammonium hydroxide; the mol ratio of ammonium metavanadate to thioacetamide is 1:(5 to 10); 1 to 2ml of ammonium hydroxide is used for preparing precursors; the precursors are subjected to hydrothermal reaction; after the reaction is completed, washing, drying, ultrasonic treatment and freeze drying are performed; the aerogel vanadiumdisulphide is obtained. The prepared aerogel vanadium disulphide has high specific surface area and mesoporous density, is used as an electrode material of a supper capacitor, and has high energy density and power density. The specific volume of the prepared aerogel vanadium disulphide can reach 218F g<-1> at the scanning speed of 5mvs<-1>.

Description

technical field [0001] The invention relates to a preparation method and application of an airgel-like vanadium disulfide nano material, belonging to the field of nano material preparation. Background technique [0002] Vanadium disulfide is a typical transition metal sulfide compound with a "sandwich sandwich" structure composed of hexagonal single-layer or multi-layer vanadium disulfide. The single-layer vanadium disulfide is composed of three atomic layers, the upper and lower layers are sulfur atomic layers, the middle layer is vanadium atomic layer, and the vanadium atomic layer is sandwiched by two sulfur atomic layers to form a layered structure. This structure makes strong covalent bonds exist in the layers, and weak van der Waals forces exist between the layers. The sulfur atoms expose the surface of the vanadium disulfide crystal and generate strong adsorption on the metal surface. Multilayer vanadium disulfide consists of several single layers of vanadium disulfi...

Claims

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Application Information

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IPC IPC(8): C01G31/00B82Y30/00H01G11/24H01M4/58H01M10/0525H01M10/054
CPCB82Y30/00C01G31/00C01P2002/72C01P2002/82C01P2004/03C01P2006/17H01G11/24H01M4/5815H01M10/0525H01M10/054Y02E60/10
Inventor 郑学军张强何文远
Owner XIANGTAN UNIV
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