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Preparation method of black titanium dioxide

A technology of black titanium dioxide and butyl titanate, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problem of low utilization rate of solar energy, and achieve the effect of good ability to absorb sunlight, simple preparation process and easy realization.

Inactive Publication Date: 2011-11-23
陕西鸿禧新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In summary, titanium dioxide is a wide bandgap semiconductor, which can only absorb less than 5% of the ultraviolet light in the entire solar spectrum, and the utilization rate of solar energy is low.

Method used

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  • Preparation method of black titanium dioxide
  • Preparation method of black titanium dioxide
  • Preparation method of black titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This embodiment specifically includes the following steps:

[0036] 1) Prepare mixed system A by mixing butyl titanate and absolute ethanol at a volume ratio of 1:2;

[0037] 2) Prepare mixed system B with distilled water and glacial acetic acid at a volume ratio of 150:1;

[0038] 3) Add the mixed system A into the mixed system B under stirring, wherein the volume ratio of the mixed system A to the mixed system B is 1:0.5, continue to stir at room temperature for 2 hours, and let it stand overnight;

[0039] 4) Stir under constant temperature heating at 80°C until a gel is formed, then add glacial acetic acid at a volume ratio of 1:300, stir and wash thoroughly, dry the gel, bake at 100°C for 100 minutes, fully grind for 30 minutes, pass 200-mesh screen, under the protection of inert gas, heat preservation at 300°C for 3 hours, and cool to room temperature with the furnace to obtain black titanium dioxide powder.

Embodiment 2

[0041] This embodiment specifically includes the following steps:

[0042] 1) Prepare mixed system A by mixing butyl titanate and absolute ethanol at a volume ratio of 1:7;

[0043] 2) Prepare mixed system B with distilled water and glacial acetic acid at a volume ratio of 250:1;

[0044] 3) Add the mixed system A into the mixed system B under stirring, wherein the volume ratio of the mixed system A to the mixed system B is 1:2, continue to stir at room temperature for 2 hours, and then set aside overnight;

[0045] 4) Stir under constant temperature heating at 80°C until a gel is formed, then add glacial acetic acid at a volume ratio of 1:350, stir and wash thoroughly, dry the gel, bake at 130°C for 30 minutes, fully grind for 30 minutes, pass 200-mesh screen, under argon protection, heat preservation at 600°C for 1 hour, and cool to room temperature with the furnace to obtain black titanium dioxide powder.

Embodiment 3

[0047] This embodiment specifically includes the following steps:

[0048] 1) Prepare mixed system A by mixing butyl titanate and absolute ethanol at a volume ratio of 1:4;

[0049] 2) Distilled water and glacial acetic acid are prepared into mixed system B with a volume ratio of 180:1;

[0050] 3) Add the mixed system A into the mixed system B under stirring, wherein the volume ratio of the mixed system A to the mixed system B is 1:1.5, continue to stir at room temperature for 2 hours, and let it stand overnight;

[0051] 4) Stir under constant temperature heating at 80°C until a gel is formed, then add glacial acetic acid at a volume ratio of 1:350, stir and wash thoroughly, dry the gel, bake at 130°C for 60 minutes, fully grind for 20 minutes, pass 200-mesh screen, under the protection of nitrogen, keep warm at 500°C for 2 hours, and cool to room temperature with the furnace to obtain black titanium dioxide powder.

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Abstract

The invention discloses a preparation method of black titanium dioxide. The method comprises steps of 1) first, preparing butyl titanate and absolute ethyl alcohol into a mixing system A; 2) preparing distilled water and glacial acetic acid into a mixing system B; 3) adding the system A into the system B with stirring, stirring at a normal temperature and placing overnight; 4) then heating at a constant temperature with stirring until generation of gel, adding glacial acetic acid again and completely washing by stirring; and drying, grinding and sieving the gel, insulating under protection ofinert gas and cooling to room temperature in furnace to obtain the black titanium dioxide powder. The preparation technology of the present invention is simple and easily realized; besides, the blacktitanium dioxide prepared under protection of inert gas of the invention not only has better sunlight absorption capability than present white titanium dioxide, but also can effectively expand a light response scope into a visible light scope.

Description

technical field [0001] The invention belongs to the technical field of titanium dioxide preparation, and relates to a black titanium dioxide, in particular to a method for preparing the black titanium dioxide. The black titanium dioxide has better sunlight absorption. Background technique [0002] Energy and the environment are major issues that human beings face and urgently need to solve in the 21st century. Environmental problems are particularly prominent. Therefore, environmental protection has become an important issue in my country's current economic development. The degradation of pollutants in water is a major aspect of improving environmental quality. Research A new type of cheap photocatalyst to improve the degradation efficiency of pollutants in water has important practical application value. Among many photocatalytic degradation materials, titanium dioxide has become a new type of semiconductor photocatalytic material due to its high catalytic activity, safety a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053
Inventor 席生岐冯三军李琳尚飞虎
Owner 陕西鸿禧新材料有限公司
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