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Preparation method of tungsten-doped anatase nanometer titanium dioxide powder

A nano-titanium dioxide, anatase-type technology, applied in titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of large nanoscale titanium dioxide powder, repeatability of polluted environment, complex production process, etc. Achieve the effect of high repeatability, easy handling and low preparation cost

Inactive Publication Date: 2019-03-29
韩城市微晶电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of tungsten-doped anatase-type nano-titanium dioxide powder, to solve the problem that the titanium dioxide powder prepared by the existing preparation method has a large nanometer scale, complex production process, high production cost and environmental pollution. And the problem of low repeatability

Method used

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  • Preparation method of tungsten-doped anatase nanometer titanium dioxide powder
  • Preparation method of tungsten-doped anatase nanometer titanium dioxide powder
  • Preparation method of tungsten-doped anatase nanometer titanium dioxide powder

Examples

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Embodiment 1

[0031] The preparation method of the tungsten-doped anatase nano-titanium dioxide powder of the present invention adopts a high-temperature calcination method, and the specific preparation steps are as follows:

[0032] Under stirring, slowly add the concentrated sulfuric acid solution into distilled water along the wall for dilution to obtain a dilute sulfuric acid solution with a concentration of 5 mol / L;

[0033] Take 108 kg of dilute sulfuric acid solution of the above concentration, 4 The mass ratio of dilute sulfuric acid solution is 1:2 to take TiCl 4 54㎏, according to ammonium tungstate ((NH 4 ) 6 h 2 W 12 o 40 ) and TiCl 4 Take 6 kg of ammonium tungstate with a mass ratio of 1:9, and set aside;

[0034] Add the above-mentioned dilute sulfuric acid solution and TiCl in sequence to the reaction vessel 4 , stirred and mixed to obtain oxytitanic acid, TiCl 4 It is added slowly under the stirring state of a magnetic stirrer;

[0035] Add the ammonium tungstate of...

Embodiment 2

[0042] The difference between this embodiment and embodiment 1 is that ammonium tungstate and TiCl 4 According to the mass ratio of 1:3, the dilute sulfuric acid solution, TiCl 4 and ammonium tungstate ((NH 4 ) 6 h 2 W 12 o 40 ) are respectively 36 kg, 18 kg, and 6 kg, and all the other are identical to embodiment 1.

[0043] Figure 5 It is the XRD spectrum of the product prepared in this example, showing that the product is a pure phase.

Embodiment 3

[0045] The difference between this embodiment and embodiments 1 and 2 is that the ammonium tungstate and TiCl added in the reaction vessel 4 The mass ratio is 1:6, dilute sulfuric acid solution, TiCl 4 and ammonium tungstate ((NH 4 ) 6 h 2 W 12 o 40 ) added in amounts of 72kg, 36kg, and 6kg respectively

[0046] Figure 6 It is the XRD spectrum of the product of this example, no impurity peak appears, and it is a pure phase product.

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Abstract

The invention discloses a preparation method of a tungsten-doped anatase nanometer titanium dioxide powder. The preparation method comprises the following steps: adding a concentrated sulfuric acid solution to distilled water for dilution to obtain a diluted sulfuric acid solution; sequentially adding the diluted sulfuric acid solution and a titanium source into a reaction container, and performing stirring and mixing to synthesize oxytitanic acid; adding a tungsten source into the reaction container, and performing stirring to uniformly mix the obtained reactant; adding ammonia water into thereaction container to adjust the pH value of the reactant to a designated value; adding distilled water to the obtained product, performing centrifuging, and removing the obtained supernatant to obtain a precipitate; and placing and calcining the precipitate in a muffle furnace to obtain the small nanometer-scale tungsten-doped anatase nanometer titanium dioxide powder. The preparation method hasthe advantages of all raw materials being conventional chemicals, no addition of a surfactant in the preparation process, easy treatment and no pollution of a generated solution, simple operation process, low preparation cost, short time, high repeatability, and rapidness in obtaining of the tungsten-doped anatase nanometer titanium dioxide powder.

Description

technical field [0001] The invention relates to nanometer material technology, in particular to a method for preparing tungsten-doped anatase nanometer titanium dioxide powder. Background technique [0002] Nano-TiO2 has been widely studied due to its strong oxidation ability under ultraviolet light, high chemical stability, low cost and environmental friendliness, and is considered to be the most promising environment-friendly catalyst. Because the carriers generated by titanium dioxide irradiated by ultraviolet light are easy to recombine, which reduces the efficiency of its photocatalytic degradation of organic matter. This leads to its low quantum yield and weak photocatalytic efficiency. In order to improve its photocatalytic activity, in recent years, researchers have used methods such as semiconductor compounding, metal or non-metal ion doping, and noble metal deposition to make photogenerated electrons and holes by changing the crystal form, grain size, and crystall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053
CPCC01G23/0532C01P2004/62
Inventor 李景雷牛天祥牛顺祥薛增勤宁军伟严智阳张鹏
Owner 韩城市微晶电子材料有限公司
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