Titanium oxide nano powder and manufacturing method thereof

A nano-powder, titanium dioxide technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., can solve the problems of uniformity to be improved, expensive production equipment, unfavorable mass and continuous production, etc., and achieve particle size distribution easily , low cost effect

Inactive Publication Date: 2013-01-02
SPRING FOUND OF NCTU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above methods require more expensive production equipment, and are not conducive to mass and continuous production; in addition, the uniformity of the powder produced by these methods still needs to be improved

Method used

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  • Titanium oxide nano powder and manufacturing method thereof
  • Titanium oxide nano powder and manufacturing method thereof
  • Titanium oxide nano powder and manufacturing method thereof

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preparation example Construction

[0015] Preparation of Octahedral Titanium Dioxide Nanopowders

[0016] The invention mainly utilizes the sol-gel method and the hydrothermal method to manufacture regular octahedral titanium dioxide nanometer powder. figure 1 A method for producing the titanium dioxide nanopowder of the present invention is shown. In step S1, titanium precursor and alkaline chelating agent are added into water. The titanium precursor can be titanium tetrachloride, titanium isopropoxide, titanium butoxide or titanium alkoxide. And the alkyl group of the titanium alkoxide may have 1 to 6 carbon atoms. The basic chelating agent can be an alcohol amine, such as triethanolamine (Triethanolamine). Step S1 can be performed under an inert gas, such as nitrogen or argon. Moreover, the reaction condition of step S1 may be 4-15° C. and continuous stirring for about 24-72 hours.

[0017] In step S2, an organic peptizer is added to the mixture obtained in step S1. The organic peptizer can be an amine...

Embodiment 1

[0022] While stirring 100 mL of deionized water at high speed, add titanium isopropoxide (titanium isopropoxide) and triethanolamine (Triethanolamine) into deionized water dropwise at a rate of 1 to several drops per second (the molar ratio of the two is about 1 to 1), a titanium precursor solution can be obtained, and nitrogen or argon can be selectively introduced. Continue stirring for about 24 to 72 hours; then add shape-controlled diethylamine (Diethylamine), and increase the temperature to 100°C and continue stirring for about 24 to 72 hours; then increase the temperature to 230-270°C and continue Stir for about 2 to 72 hours for hydrothermal reaction. The obtained mixture is then collected as powder by means of filtration or centrifugation. Wash the above powder with deionized water at least three times to remove residual solvent, triethanolamine or diethylamine; then dry it in an oven with a temperature between 60 and 500°C, thus obtaining the regular octahedral titan...

Embodiment 2

[0029] Mix 6 g of the aforementioned regular octahedral titanium dioxide nanopowder with 1 mL of acetic acid and stir for three minutes; add 5 mL of deionized water and stir for 3 minutes to make it evenly mixed; then add 15 mL of ethanol, 20 g of terpineol and 30 g of ethyl cellulose Afterwards, stir for 12 hours to make it uniformly dispersed, and the manufacture of the regular octahedral titanium dioxide nano-slurry is completed.

[0030] By screen printing, the aforementioned regular octahedral titanium dioxide nano-slurry is coated on a transparent conductive glass substrate, and sintered at high temperature to remove organic substances. The sintering temperature is between 300 and 600°C, and the sintering time is between 1 to 5 hours; then cooled to room temperature, a regular octahedral titanium dioxide nano-film can be formed on the substrate with a thickness of 1 to 10 microns, which can be used for example as a transparent electrode of a solar cell. The hardness of t...

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Abstract

The invention relates to titanium oxide nano powder and a manufacturing method thereof. The method comprises the following steps of (a) adding a titanium precursor and an alkaline chelating agent into water; (b) adding an organic peptizing agent into the mixture resulting from the step (a); (c) allowing the hydrothermal reaction of the mixture obtained from the step (b); and (d) separating the product resulting from the step (c) to obtain the titanium oxide nano powder. The invention also relates to the titanium oxide nano powder, which has the crystal form of a regular octahedron and has a grain size between 30 nm and 500 nm.

Description

technical field [0001] The invention relates to a method for manufacturing nanometer powder, in particular to a method for manufacturing regular octahedral titanium dioxide nanometer powder. Background technique [0002] In recent years, the development of global nanotechnology is in the ascendant. The successful development of many nanomaterials has really improved people's lives and created unlimited business opportunities. Due to titanium dioxide (TiO 2 ) The semiconductor energy level has a wide energy band, so it is widely used as a multifunctional photocatalyst. Although the semiconductor energy level of zinc oxide also has a wide energy band, it may also be used as a multifunctional catalyst material, but its chemical stability is poor (for example, it is not resistant to acidic solutions). Therefore, most of the nano-photocatalyst materials are mainly titanium dioxide, which is currently the most widely used nano-material. [0003] There are many methods for manuf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y40/00
Inventor 刁维光蓝启铭徐嘉伟
Owner SPRING FOUND OF NCTU
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