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A kind of preparation method of mos2 micro-nano ball with hierarchical structure

A technology of micro-nano spheres and hierarchical structure is applied in the field of preparation of MoS2 micro-nano spheres, which can solve the problems of difficult control of particle shape and high energy consumption, and achieve the effects of low cost, large amount of products and simple operation.

Active Publication Date: 2020-05-05
安徽中航纳米技术发展有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Preparation of nano-MoS by physical method 2 The powder has the advantages of simple principle and high yield, but this method consumes a lot of energy, and the obtained MoS 2 Difficult to control particle shape

Method used

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  • A kind of preparation method of mos2 micro-nano ball with hierarchical structure
  • A kind of preparation method of mos2 micro-nano ball with hierarchical structure
  • A kind of preparation method of mos2 micro-nano ball with hierarchical structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] MoS with hierarchical structure 2 Preparation and characterization of micro-nanospheres:

[0020] The preparation method mainly includes two processes of preparation of reaction precursor liquid and hydrothermal reaction, and the specific steps are as follows:

[0021] 1) At room temperature, add 3 g of thioacetamide and 0.4 g of sodium molybdate to 100 mL of polyacrylamide (PAM) aqueous solution with a concentration of 0.1 g / L, and stir evenly to obtain a reaction precursor;

[0022] 2) Transfer the reaction precursor solution into the reactor and conduct hydrothermal reaction at 180°C for 24 hours to obtain MoS 2 Micro-nano structured materials.

[0023] figure 1 Figure a is the SEM overall morphology of the prepared product molybdenum disulfide, which is the macroscopic distribution of molybdenum disulfide particles, and the obtained MoS 2 Mainly exists in spherical form, the obtained MoS 2 The degree of sphericity is very high, the degree of agglomeration is re...

Embodiment 2

[0025] The effect of different polyacrylamide dosage on MoS 2 Influence of Particle Morphology:

[0026] In this embodiment, two groups of experiments were adopted, respectively without adding polyacrylamide (PAM) and adding excessive polyacrylamide (PAM) (concentration: 3 g / L), and other conditions were the same as in Example 1.

[0027] figure 2 a represents the form of the molybdenum disulfide product obtained without adding polyacrylamide (PAM), the particle size is irregular, the shape is different, and the agglomeration phenomenon is very serious. After adding excess polyacrylamide (PAM) (concentration is 3g / L), if figure 2 b. Although spherical molybdenum disulfide can be obtained, the morphology of the obtained product is not very regular, which is not as expected. When the amount of polyacrylamide (PAM) is 0.01-0.3g / 100mL, the morphology of the obtained molybdenum disulfide is better.

[0028] Based on the above experimental results, it can be considered that Mo...

Embodiment 3

[0032] Effect of different reaction times on MoS 2 Particle shape and size effects:

[0033] This embodiment adopts three groups of experiments, and the hydrothermal reaction time is 12h, 24h, 48h respectively, and other conditions are the same as embodiment 1.

[0034] image 3 The main explanation is to change the reaction time to explore the morphology characteristics of molybdenum disulfide. The concentration of polyacrylamide (PAM) used was 0.01 g / 100 mL. image 3 a is the SEM image of the product obtained with a reaction time of 12 hours. It can be seen from the figure that although the molybdenum disulfide is spherical, it has agglomeration. image 3 b is the SEM picture of the product obtained with a reaction time of 24 hours. The particle size of the obtained product is relatively uniform, and there is no agglomeration phenomenon, and the effect is the best. When the reaction is 48h, such as image 3c. At this time, the shape of molybdenum disulfide is still sphe...

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Abstract

The invention provides a preparation method of MoS2 micro-nanospheres with a hierarchical structure, and relates to the technical field of preparation of micro-nanostructured materials. The MoS2 micro-nanospheres with the hierarchical structure are prepared through a hydrothermal reaction, an S source and a Mo source are added to a PAM (polyacrylamide) aqueous solution at the room temperature andstirred uniformly, and a reaction precursor solution is obtained; the reaction precursor solution is transferred into a reaction kettle and subjected to the hydrothermal reaction, and the MoS2 micro-nanostructured material can be obtained. According to the preparation method, the MoS2 micro-nanospheres with the hierarchical structure are successfully prepared from thioacetamide or thiourea as theS source, sodium molybdate or ammonium molybdate as the Mo source and a PAM template control agent with a simple hydrothermal method. Shaping of the MoS2 particles is realized, and one new method is provided for preparation of the MoS2 material with the hierarchical structure. The preparation method is simple to operate and low in cost, and the yield of obtained products is high.

Description

technical field [0001] The invention relates to the technical field of preparation of micro-nano structure materials, in particular to a MoS with hierarchical structure 2 Preparation method of micro-nanospheres. Background technique [0002] Nanoscale Narrow Bandgap MoS 2 (E g ~1.29eV) has the same layered structure as graphene, and has the advantages of stable chemical properties, high specific surface area, and good catalytic performance. Its unique physical and chemical properties make MoS 2 It has been widely used in the fields of lubrication, catalysis and electrochemistry. [0003] Nano-MoS 2 The preparation method of the method mainly contains physical method and hydrothermal method two kinds usually. The physical method is to use mechanical grinding and high-energy physics to treat bulk MoS 2 Grinding and refining to obtain nanoscale MoS 2 . The hydrothermal method generally uses thiourea and molybdate as raw materials to prepare nano-MoS 2 . Both methods ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G39/06B82Y40/00
CPCB82Y40/00C01G39/06C01P2002/72C01P2004/01C01P2004/34
Inventor 王开新韩成良周正赵世维卞正东
Owner 安徽中航纳米技术发展有限公司
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