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A kind of tungsten disulfide/titanium dioxide composite and its preparation method

A technology of titanium dioxide and tungsten disulfide, applied in chemical instruments and methods, chemical/physical processes, lubricating compositions, etc., can solve problems such as difficult preparation of tungsten disulfide/titanium dioxide composites, shorten synthesis time and production cost Low, easy to control the effect of reaction conditions

Active Publication Date: 2017-11-14
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 / titanium dioxide composites by the above method, mainly because tungstate is easy to generate tungstic acid or tungsten oxides under acidic conditions (Chinese patent 201210078592.X)

Method used

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  • A kind of tungsten disulfide/titanium dioxide composite and its preparation method
  • A kind of tungsten disulfide/titanium dioxide composite and its preparation method
  • A kind of tungsten disulfide/titanium dioxide composite and its preparation method

Examples

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Effect test

Embodiment 1

[0034] Put 1 part of sodium tungstate and 0.5 part of titanium dioxide in 133 parts of water, heat to 80°C, adjust the pH value to 0.5 with hydrochloric acid, the obtained strong acidic solution activates the surface of titanium dioxide, and at the same time, tungstate and acid react to form tungsten The acid precipitate interacts with the activated titanium dioxide surface to form a uniformly mixed tungstic acid / titanium dioxide composite precipitate. After the reaction is finished, filter, wash and dry, then mix the tungstic acid / titanium dioxide compound with 10 parts of elemental sulfur evenly and place it in N 2 Heating and vulcanizing at 300°C for 60 minutes, then raising the temperature to 600°C for 30 minutes for evaporative desulfurization after vulcanization, and obtaining a tungsten disulfide / titanium dioxide composite (such as figure 1 Atlas and Figure 2-3 as shown in the photo).

Embodiment 2

[0036] Put 1 part of ammonium tungstate and 0.5 part of titanium dioxide in 133 parts of water, heat to 80°C, adjust the pH value to 0.5 with hydrochloric acid, the obtained strong acid solution activates the surface of titanium dioxide, and at the same time, tungstate and acid react to form tungsten The acid precipitate interacts with the activated titanium dioxide surface to form a uniformly mixed tungstic acid / titanium dioxide composite precipitate. After the reaction is finished, filter, wash and dry, then mix the tungstic acid / titanium dioxide compound and 10 parts of elemental sulfur evenly, put it in Ar gas, heat and vulcanize at 300°C for 60 minutes, and then heat up to 600°C for evaporative desulfurization After 30 minutes, the tungsten disulfide / titanium dioxide composite (approximately figure 1 Atlas and Figure 2-3 as shown in the photo).

Embodiment 3

[0038] Put 1 part of potassium tungstate and 0.5 part of titanium dioxide in 133 parts of water, heat to 80°C, adjust the pH value to 0.5 with hydrochloric acid, the obtained strong acidic solution activates the surface of titanium dioxide, and at the same time, tungstate and acid react to form tungsten The acid precipitate interacts with the activated titanium dioxide surface to form a uniformly mixed tungstic acid / titanium dioxide composite precipitate. After the reaction is finished, filter, wash and dry, then mix the tungstic acid / titanium dioxide compound with 10 parts of elemental sulfur evenly and place it in N 2 Heat and vulcanize at 400°C in air for 30 minutes, then heat up to 450°C for 60 minutes for evaporative desulfurization after vulcanization, and obtain a tungsten disulfide / titanium dioxide composite (approximately figure 1 Atlas and Figure 2-3 as shown in the photo).

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Abstract

A tungsten disulfide / titanium dioxide composite and a preparation method thereof relate to the technical fields of lubricants and photocatalysts. The tungsten disulfide / titanium dioxide composite consists of tungsten disulfide and titanium dioxide dispersed uniformly to form a layered structure. In the composite, titanium dioxide and tungsten disulfide exist in the anatase crystal form and the hexagonal 2H crystal form respectively, and the tungsten disulfide particles are layered. The clusters accumulated on the surface of tungsten disulfide particles are titanium dioxide. Use strong acidic solution to activate the surface of titanium dioxide, and at the same time, tungstate reacts with acid, and the generated tungstic acid (tungsten oxide hydrate) precipitates and reacts with the activated titanium dioxide surface to form a uniformly mixed tungstic acid / titanium dioxide compound, and then the compound It is mixed with elemental sulfur and heated to vulcanize to convert tungsten oxide into tungsten disulfide, then heated and calcined to desulfurize, and finally cooled to obtain. The preparation process is simple, the reaction is fast, the reaction conditions are easy to control, the production cost is low, and it is suitable for mass production.

Description

technical field [0001] The invention relates to the technical field of lubricants and photocatalysts, in particular to a tungsten disulfide / titanium dioxide composite and a preparation method thereof. Background technique [0002] Titanium dioxide is one of the most commonly used photocatalysts, and it has irreplaceable advantages in the field of photocatalysis; recent studies have shown that titanium dioxide also has certain lubricating properties and can be used as a lubricating additive. The catalytic and lubricating properties of titanium dioxide and other inorganic additives such as molybdenum disulfide will be further improved, so the chemical synthesis of titanium dioxide composites is one of the important ways to improve its catalytic and lubricating properties (Tribology Letters, 2011, 43: 77-87; Journal of Materials Science, 2010, 45:2640-2648). [0003] Tungsten disulfide is similar to molybdenum disulfide in that it not only has excellent lubricating performance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/047C10M125/00
Inventor 胡坤宏胡恩柱韩成良赵楠楠胡艺纹
Owner HEFEI UNIV