Metal-phase molybdenum disulfide, self-supporting electrode, preparation methods and application

Abstract

The invention relates to the field of materials, and particularly discloses metal-phase molybdenum disulfide, a self-supporting electrode, preparation methods and application. The metal-phase molybdenum disulfide comprises the following raw materials: molybdenum trioxide (serving as a molybdenum source), a sulfur source, a proper amount of a reducing agent and a proper amount of water, wherein a ratio of the number of molybdenum atoms in the molybdenum trioxide to the number of sulfur atoms in the sulfur source is 1: (5-40). According to the metal-phase molybdenum disulfide provided by an embodiment of the invention, molybdenum trioxide is adopted as the molybdenum source, hydrothermal synthesis from a proper amount of the sulfur source, the reducing agent and the water is carried out to prepare the metal-phase molybdenum disulfide, and the content of the metal-phase molybdenum disulfide in the product is high; and the preparation method of the metal-phase molybdenum disulfide providedby the invention has the advantages of simplicity and safety in operation, short preparation period and suitability for large-scale production, solves the problems of long preparation period and lowsafety due to the fact that most of conventional metal-phase molybdenum disulfide is synthesized through lithium ion delamination, and has wide market prospects.

Description

technical field

[0001] The invention relates to the field of materials, in particular to a metal phase molybdenum disulfide, a self-supporting electrode, a preparation method and an application. Background technique

[0002] Molybdenum disulfide (MoS 2 ) has a layered structure similar to graphite. According to the different coordination between S-Mo, molybdenum disulfide can be divided into different crystal phases, namely 1T phase and 2H phase. The 2H phase is a typical semiconductor, while the 1T phase has Similar to the conductivity of a conductor, it is also called metallic phase molybdenum disulfide. From the perspective of practical application, the 1T phase has obvious advantages, especially in fields involving electron transfer such as electrocatalysis, battery electrodes, and supercapacitors. Usually, metallic molybdenum disulfide can only be synthesized artificially.

[0003] At present, the traditional method of synthesizing metal-phase molybdenum disulfide is...

Examples

Embodiment 1

[0044] A metal phase molybdenum disulfide, the specific preparation method is as follows:

[0045] 1) Weigh 12 mg of molybdenum trioxide, 500 mg of sodium sulfide, 14 mg of thioacetamide and 0.12 g of urea, dissolve them in water, stir to form a uniform mixed solution, and obtain the first solution;

[0046] 2) Transfer the first solution to a 50mL reactor, seal the reactor, and place it in an oven for hydrothermal reaction at 200°C for 8 hours;

[0047] 3) Naturally cool to room temperature after the hydrothermal reaction, centrifuge the obtained solid product, wash it several times with deionized water and ethanol respectively, collect the solid product, and dry it in vacuum to obtain metal phase molybdenum disulfide powder.

Embodiment 2

[0049] A metal phase molybdenum disulfide, the specific preparation method is as follows:

[0050] 1) Weigh 14.4 mg of molybdenum trioxide, 39 mg of sodium sulfide and 0.12 g of urea, dissolve them in water, stir to form a uniform mixed solution, and obtain the first solution;

[0051] 2) Transfer the first solution to a 50mL reactor, seal the reactor, and place it in an oven for hydrothermal reaction at 160°C for 4 hours;

[0052] 3) Naturally cool to room temperature after the hydrothermal reaction, centrifuge the obtained solid product, wash it several times with deionized water and ethanol respectively, collect the solid product, and dry it in vacuum to obtain metal phase molybdenum disulfide powder.

Embodiment 3

[0054] A metal phase molybdenum disulfide, the specific preparation method is as follows:

[0055] 1) Weigh 14.4 mg of molybdenum trioxide, 312 mg of sodium sulfide and 0.12 g of urea, dissolve them in water, stir to form a uniform mixed solution, and obtain the first solution;

[0056] 2) Transfer the first solution to a 50mL reactor, seal the reactor, and place it in an oven for hydrothermal reaction at 240°C for 24 hours;

[0057] 3) Naturally cool to room temperature after the hydrothermal reaction, centrifuge the obtained solid product, wash it several times with deionized water and ethanol respectively, collect the solid product, and dry it in vacuum to obtain metal phase molybdenum disulfide powder.

technical field

[0001] The invention relates to the field of materials, in particular to a metal phase molybdenum disulfide, a self-supporting electrode, a preparation method and an application. Background technique

[0002] Molybdenum disulfide (MoS 2 ) has a layered structure similar to graphite. According to the different coordination between S-Mo, molybdenum disulfide can be divided into different crystal phases, namely 1T phase and 2H phase. The 2H phase is a typical semiconductor, while the 1T phase has Similar to the conductivity of a conductor, it is also called metallic phase molybdenum disulfide. From the perspective of practical application, the 1T phase has obvious advantages, especially in fields involving electron transfer such as electrocatalysis, battery electrodes, and supercapacitors. Usually, metallic molybdenum disulfide can only be synthesized artificially.

[0003] At present, the traditional method of synthesizing metal-phase molybdenum disulfide is...

Examples

Embodiment 1

[0044] A metal phase molybdenum disulfide, the specific preparation method is as follows:

[0045] 1) Weigh 12 mg of molybdenum trioxide, 500 mg of sodium sulfide, 14 mg of thioacetamide and 0.12 g of urea, dissolve them in water, stir to form a uniform mixed solution, and obtain the first solution;

[0046] 2) Transfer the first solution to a 50mL reactor, seal the reactor, and place it in an oven for hydrothermal reaction at 200°C for 8 hours;

[0047] 3) Naturally cool to room temperature after the hydrothermal reaction, centrifuge the obtained solid product, wash it several times with deionized water and ethanol respectively, collect the solid product, and dry it in vacuum to obtain metal phase molybdenum disulfide powder.

Embodiment 2

[0049] A metal phase molybdenum disulfide, the specific preparation method is as follows:

[0050] 1) Weigh 14.4 mg of molybdenum trioxide, 39 mg of sodium sulfide and 0.12 g of urea, dissolve them in water, stir to form a uniform mixed solution, and obtain the first solution;

[0051] 2) Transfer the first solution to a 50mL reactor, seal the reactor, and place it in an oven for hydrothermal reaction at 160°C for 4 hours;

[0052] 3) Naturally cool to room temperature after the hydrothermal reaction, centrifuge the obtained solid product, wash it several times with deionized water and ethanol respectively, collect the solid product, and dry it in vacuum to obtain metal phase molybdenum disulfide powder.

Embodiment 3

[0054] A metal phase molybdenum disulfide, the specific preparation method is as follows:

[0055] 1) Weigh 14.4 mg of molybdenum trioxide, 312 mg of sodium sulfide and 0.12 g of urea, dissolve them in water, stir to form a uniform mixed solution, and obtain the first solution;

[0056] 2) Transfer the first solution to a 50mL reactor, seal the reactor, and place it in an oven for hydrothermal reaction at 240°C for 24 hours;

[0057] 3) Naturally cool to room temperature after the hydrothermal reaction, centrifuge the obtained solid product, wash it several times with deionized water and ethanol respectively, collect the solid product, and dry it in vacuum to obtain metal phase molybdenum disulfide powder.

Images