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Tungsten disulfide/molybdenum disulfide/montmorillonite compound and preparation method thereof

A technology of tungsten disulfide and molybdenum disulfide, which is applied in chemical instruments and methods, chemical/physical processes, lubricating compositions, etc., can solve problems such as difficulty in preparing tungsten disulfide, etc., and achieve low production cost and shorten the synthesis time. time, the effect of reducing the cost of synthesis

Active Publication Date: 2015-12-16
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to prepare tungsten disulfide by the same method, mainly because tungstate is easy to generate tungstic acid or tungsten oxide under hydrochloric acid conditions (Chinese patent 201210078592.X), if you want to co-precipitate under hydrochloric acid conditions It is difficult to obtain the tungsten disulfide / molybdenum disulfide / montmorillonite composite by calcination from the precursor

Method used

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  • Tungsten disulfide/molybdenum disulfide/montmorillonite compound and preparation method thereof
  • Tungsten disulfide/molybdenum disulfide/montmorillonite compound and preparation method thereof
  • Tungsten disulfide/molybdenum disulfide/montmorillonite compound and preparation method thereof

Examples

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Effect test

Embodiment 1

[0035] Dissolve 1 part of sodium molybdate, 1.5 parts of sodium tungstate and 3 parts of thioacetamide in 120 parts of water, add 2 parts of montmorillonite, stir to 82°C while heating, and add concentrated hydrochloric acid to adjust the pH to 0.5. When the co-precipitation reaction starts, after the reaction is completed, the precursor of the composite is obtained by filtering, washing and drying. The precursor and 10 parts of elemental sulfur are uniformly mixed, and then the mixture is put into N 2 In a tube furnace, heated to 300°C and held for 60 minutes, then raised the temperature to 600°C and held for 30 minutes, and finally cooled to room temperature to take out the sample to obtain a tungsten disulfide / molybdenum disulfide / montmorillonite composite. (Such as figure 1 Shown in the map).

Embodiment 2

[0037] Dissolve 1 part of ammonium molybdate, 1.5 parts of ammonium tungstate and 3 parts of thioacetamide in 120 parts of water, add 0.5 part of montmorillonite, stir while heating to 82°C, add concentrated hydrochloric acid to adjust the pH to 0.5. When the co-precipitation reaction started, after the reaction, the precursor of the composite was obtained by filtering, washing and drying. The precursor was mixed with 10 parts of elemental sulfur uniformly, and then the mixture was heated to 300 in a tube furnace with Ar gas. ℃ and hold for 60 minutes, then raise the temperature to 600 ℃ and hold for 30 minutes, and finally cool to room temperature and take out the sample to obtain a tungsten disulfide / molybdenum disulfide / montmorillonite composite (approximately figure 1 Shown in the map).

Embodiment 3

[0039] Dissolve 1 part of potassium molybdate, 1.5 parts of potassium tungstate and 3 parts of thioacetamide in 120 parts of water, add 10 parts of montmorillonite, stir to 82°C while heating, and add concentrated hydrochloric acid to adjust the pH to 0.5. When the co-precipitation reaction starts, after the reaction is completed, the precursor of the composite is obtained by filtering, washing and drying. The precursor and 10 parts of elemental sulfur are uniformly mixed, and then the mixture is put into N 2 In a tube furnace, heated to 300°C and held for 60 minutes, then increased the temperature to 600°C and held for 30 minutes, and finally cooled to room temperature. The sample was taken out to obtain a tungsten disulfide / molybdenum disulfide / montmorillonite composite (approximately in figure 1 Shown in the map).

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Abstract

The invention relates to a tungsten disulfide / molybdenum disulfide / montmorillonite compound and a preparation method thereof, and relates to the technical fields of lubricants and photocatalysts. The method comprises the following steps: activating the surface of montmorillonite by a strong acid; hydrolyzing thioacetamide under a highly acidic condition to generate hydrogen sulfide for sulfurating molybdate in order to obtain amorphous molybdenum sulfide; acidifying tungstate by a strong acid to obtain tungsten oxide hydrate, and co-precipitating the amorphous molybdenum sulfide and the tungsten oxide hydrate on activated montmorillonite from a reaction system to generate a compound precursor; and mixing the precursor with elemental sulfur, carrying out heating sulfuration to convert tungsten oxide into tungsten disulfide, and heating the amorphous molybdenum sulfide to carry out calcining desulphurization in order to obtain the tungsten disulfide / molybdenum disulfide / montmorillonite compound. The preparation method has the advantages of simplicity, fast reaction, low production cost, and suitableness for batch production.

Description

Technical field [0001] The invention relates to the technical field of lubricants and photocatalysts, in particular to a tungsten disulfide / molybdenum disulfide / montmorillonite composite and a preparation method thereof. Background technique [0002] Montmorillonite is a natural layered silicate mineral, which is widely used in polymer modification, catalysts, lubricants and other fields. Tungsten disulfide and molybdenum disulfide are two typical layered transition metal binary sulfides, which are commonly used solid lubricants and hydrodesulfurization catalysts. In recent years, some studies have shown that these two sulfides also have good photocatalytic properties. Although tungsten disulfide and molybdenum disulfide have good lubricating and catalytic properties, their performance needs to be further improved in many occasions. Some recent studies have shown that there may be a certain degree of synergistic lubrication and synergistic catalysis between different inorganic l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M103/06B01J27/051
Inventor 胡坤宏晁先泉史彬陈浩姜进洪胡恩柱
Owner HEFEI UNIV
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