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Nano titania and preparation method thereof

A nano-titanium dioxide, titanium dioxide technology, applied in the direction of titanium dioxide, nanostructure manufacturing, titanium oxide/hydroxide, etc., can solve problems such as damage

Active Publication Date: 2011-03-16
JIANGSU KAOPULE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, ultraviolet light can cause damage to many materials, especially polymer materials, which also brings many unfavorable factors to the application.

Method used

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  • Nano titania and preparation method thereof
  • Nano titania and preparation method thereof
  • Nano titania and preparation method thereof

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preparation example Construction

[0046] Step b) preparation of emulsion of terpene compound

[0047] The terpene compound is made into an emulsion by stirring in the presence of complex emulsifiers.

[0048] The terpene compound used in the present invention can be hemiterpene, monoterpene, sesquiterpene, diterpene, polyterpene or mixture thereof, preferably selected from the group consisting of isoprene, pinene, limonene, Myrcene, Camphene, Zingiberene, Camphorene, and Squalene. The amount of the terpene compound is 0.5-10% by weight, preferably 1-8% by weight, more preferably 2-7% by weight based on the weight of the semiconductor material-doped nano-titanium dioxide used in step a).

[0049] Because in the oil-in-water or water-in-oil emulsifier system, the emulsifier should not only have a strong affinity with the dispersed phase, but also have a strong affinity with the dispersion medium. It is often difficult for a single emulsifier to meet the requirements of these two aspects. A compound emulsifie...

Embodiment 1

[0070] In Example 1, the ferric oxide-doped nano-titanium dioxide prepared in Step 1 of Chinese Invention Patent Application 02103829.5 Example 1 was used as the matrix, wherein the weight ratio of titanium dioxide to ferric oxide was 67:33, and the matrix The particle size is 30-60nm.

[0071] Fully disperse 20 g of ferric oxide-doped nano-titanium dioxide in 100 ml of pure water at 50° C. in the presence of 0.6 g of sodium propenyl sulfonate to form an aqueous dispersion. The composite emulsifier (compound hydrophilic lipophilic balance value: 0.8 * 14.9+0.2 * 4.3=12.78, the weight of composite emulsifier is 3 grams) and 0.4 gram α-pinene by 2.4 gram Tween 60 and 0.6 gram Span 80 composition Mix at room temperature and stir for half an hour to obtain an emulsion. Then, within about 1 minute, the emulsion was added dropwise to the above-mentioned 100ml semiconductor-doped nano-titanium dioxide dispersion in water, fully stirred, and then dried at 20° C. and 20 mmHg for 5 hou...

Embodiment 2

[0074] In embodiment 2, the zinc oxide-doped nano-titanium dioxide prepared in step 1 of Chinese invention patent application 02103829.5 embodiment 2 is used as the substrate, wherein the weight ratio of titanium dioxide and zinc oxide is 80:20, and the particle diameter of the substrate is 50-80nm.

[0075]Fully disperse 30 grams of zinc oxide-doped nano-titanium dioxide in 100 ml of pure water at 50° C. in the presence of 1.2 grams of sodium dodecylbenzenesulfonate to form an aqueous dispersion. Composite emulsifier (composite hydrophilic-lipophilic balance value: 0.82 * 14.9+0.18 * 4.3=12.99, the weight of composite emulsifier is 5 grams) and 1.5 gram myrcene by 4.1 gram Tween 60 and 0.9 gram Span 80 composition Mix at room temperature and stir for half an hour to obtain an emulsion. Then, within about 2 minutes, the emulsion was added dropwise to the above-mentioned 100ml semiconductor-doped nano-titanium dioxide dispersion in water, fully stirred, and then dried at 20° C...

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Abstract

The invention relates to nano titania, comprising A) semiconductor material doped nano titania as matrix, B) conjugated system organics covering the surface of the semiconductor material doped nano titania matrix and C) terpene compounds covering the semiconductor material doped nano titania matrix, wherein the semiconductor material is selected for oxide of tungsten, niobium, chromium, indium, tin, strontium, iron, vanadium, gallium, germanium or zinc; the weight ratio of titanium to the semiconductor material in terms of metal oxide in the semiconductor material doped nano titania matrix is60:40-96:4; the grain size of the semiconductor material doped nano titania matrix is not more than 100nm; the conjugated system organics account for 0.01-20% of the semiconductor material doped nanotitania matrix by weight; and the terpene compounds account for 0.5-10% of the semiconductor material doped nano titania by weight. The invention also relates to a method for preparing the titania.

Description

technical field [0001] The invention relates to nanometer titanium dioxide, more specifically, relates to semiconductor material doped nanometer titanium dioxide covered with conjugated system organic matter and terpene compound. The present invention further relates to a method for preparing said nano titanium dioxide. Background technique [0002] At present, the research directions in the field of photocatalysis are mainly focused on broadening the excitation light source, fully improving the utilization rate of natural light (including ultraviolet light, visible light and infrared light), and reducing the difficulty of implementing engineering for photocatalytic application technology. [0003] At present, the nano-titanium dioxide photocatalyst used mainly uses ultraviolet light for photocatalysis. The proportion of ultraviolet light in sunlight is very small, only 5% of the sunlight reaching the earth's surface, so the efficiency of photocatalytic reactions is limited...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047B82B3/00
Inventor 徐瑞芬马卓尔于义龙解双英张星
Owner JIANGSU KAOPULE NEW MATERIALS
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