Molybdenum disulfide/titanium dioxide compound and preparation method thereof

A molybdenum disulfide and titanium dioxide technology, applied in chemical instruments and methods, chemical/physical processes, lubricating compositions, etc., can solve the problem of inability to obtain properties of molybdenum disulfide/titanium dioxide composites, insufficient mutual dispersion, and affecting the performance of the composites. and other problems, to achieve the effect of shortening the synthesis time, improving the dispersibility and lowering the production cost

Active Publication Date: 2014-12-03
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the process of synthesizing the molybdenum disulfide / titanium dioxide composite mentioned above, titanium dioxide is directly added to the reaction system. If you want to obtain a nanoscale molybdenum disulfide / titania composite, you need to synthesize nano-titanium dioxide first, and then synthesize the nano-titanium dioxide Added to the reaction system, this staged synthesis method will inevitably increase the synthesis cost, and the required synthesis time will increase accordingly
At the same time, the above method of directly adding titanium dioxide will also lead to insufficient mutual dispersion between the two components of molybdenum disulfide and titanium dioxide in the composite, thereby affecting the performance of the composite.
In addition, the above synthesis methods cannot obtain molybdenum disulfide / titanium dioxide composites with superior properties.

Method used

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  • Molybdenum disulfide/titanium dioxide compound and preparation method thereof
  • Molybdenum disulfide/titanium dioxide compound and preparation method thereof
  • Molybdenum disulfide/titanium dioxide compound and preparation method thereof

Examples

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Effect test

Embodiment 1

[0026] Dissolve 1 part of sodium molybdate and 6 parts of thioacetamide in 100 parts of water, heat the above solution to 80°C and keep it warm, then add 20 parts of titanium tetrachloride, the hydrochloric acid produced by the hydrolysis of titanium tetrachloride will cause thioacetamide Hydrolysis, the hydrogen sulfide produced by the hydrolysis of thioacetamide immediately reacts with sodium molybdate, and the reaction product forms a co-precipitation precursor with titanium dioxide produced by the hydrolysis of titanium tetrachloride. After the reaction, the co-precipitation precursor is filtered, washed and dried Calcined at 500°C for 50min in hydrogen, and cooled to room temperature to obtain a gray molybdenum disulfide / titanium dioxide composite (such as figure 1 Atlas and Figure 2-3 as shown in the photo).

Embodiment 2

[0028] Dissolve 1 part of sodium molybdate and 50 parts of thioacetamide in 2000 parts of water, heat the above solution to 100°C and keep it warm, then add 85 parts of titanium tetrachloride, the hydrochloric acid produced by the hydrolysis of titanium tetrachloride will cause thioacetamide Hydrolysis, the hydrogen sulfide produced by the hydrolysis of thioacetamide immediately reacts with sodium molybdate, and the reaction product forms a co-precipitation precursor with titanium dioxide produced by the hydrolysis of titanium tetrachloride. After the reaction, the co-precipitation precursor is filtered, washed and dried Calcined at 1000°C for 5min in nitrogen, and cooled to room temperature to obtain a gray molybdenum disulfide / titanium dioxide composite (approximately figure 1 Atlas and Figure 2-3 as shown in the photo).

Embodiment 3

[0030] Dissolve 1 part of sodium molybdate and 1 part of thioacetamide in 10 parts of water, heat the above solution to 60°C and keep it warm, then add 1 part of titanium tetrachloride, the hydrochloric acid produced by the hydrolysis of titanium tetrachloride will cause thioacetamide Hydrolysis, the hydrogen sulfide produced by the hydrolysis of thioacetamide immediately reacts with molybdate, and the reaction product forms a co-precipitation precursor with titanium dioxide produced by the hydrolysis of titanium tetrachloride. After the reaction, the co-precipitation precursor is filtered, washed and dried Calcined at 800°C for 40min in argon, and cooled to room temperature to obtain a gray molybdenum disulfide / titanium dioxide composite (approximately figure 1 Atlas and Figure 2-3 as shown in the photo).

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Abstract

The invention discloses a molybdenum disulfide/titanium dioxide compound and a preparation method thereof and relates to the technical field of lubricating agents and photo-catalysts. The molybdenum disulfide/titanium dioxide compound comprises a plurality of molybdenum disulfide particles and titanium dioxide particles in the presence forms of clusters; spherical molybdenum disulfide particles are arranged at the center of each cluster; the size of each spherical molybdenum disulfide particle is 100-300nm; the titanium dioxide particles are arranged around the perimeter of each cluster; the size of each titanium dioxide particle is 30-80nm; and the titanium dioxide particles in each cluster are uniformly deposited on the surfaces of the molybdenum disulfide particles. An acid environment is provided by hydrochloric acid which is produced by quickly hydrolyzing titanium tetrachloride; thioacetamide is quickly hydrolyzed in the acid environment to produce hydrogen sulfide; the hydrogen sulfide quickly reacts with molybdate to generate a molybdenum disulfide precursor; the hydrochloric acid is quickly consumed by the hydrolysis of the thioacetamide, so that the hydrolysis degree of the titanium tetrachloride is quickly improved, and thus a large amount of titanium dioxide is generated and deposited on the surface of the molybdenum disulfide precursor. The molybdenum disulfide/titanium dioxide compound is simple in preparation process, quick to react, low in production cost and suitable for mass production.

Description

technical field [0001] The invention relates to the technical field of lubricants and photocatalysts, in particular to a molybdenum disulfide / titanium dioxide composite and a preparation method thereof. Background technique [0002] Molybdenum disulfide has excellent lubricating and catalytic properties, and has broad application prospects in the fields of solid lubrication, hydrodesulfurization and photocatalysis. Although molybdenum disulfide has good lubricating performance and catalytic performance, its performance needs to be further improved in many aspects. Combining molybdenum disulfide with other inorganic particles and using their synergistic lubricating and synergistic catalytic effects is one of the methods to improve the performance of molybdenum disulfide. [0003] Titanium dioxide has excellent photocatalytic properties and is one of the commonly used photocatalysts. In addition, titanium dioxide also has certain lubricating properties. Studies have shown th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051C10M103/06
Inventor 胡坤宏秦广超徐勇曹兴安刘密密
Owner HEFEI UNIV
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