a tio 2 /wo 3 Preparation method of composite powder

A composite powder and uniform mixing technology, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., can solve the long reaction cycle, complex preparation process, and reaction condition requirements Harsh and other problems, to achieve the effect of short cycle time, high photodegradability, and low price

Active Publication Date: 2017-06-13
广西自贸区见炬科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These preparation methods have their unique advantages, but most of them have disadvantages such as complex preparation process, long reaction cycle, and harsh reaction conditions [Xie Yanzhao, Lin Ruijun, Zhao Lin et al. Composite TiO 2 Research progress on photocatalyst preparation and photocatalytic properties[J]. Jiangxi Chemical Industry, 2014, (2).]

Method used

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  • a tio <sub>2</sub> /wo <sub>3</sub> Preparation method of composite powder
  • a tio <sub>2</sub> /wo <sub>3</sub> Preparation method of composite powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Mix titanium sulfate, urea, ethanol, and deionized water according to the mass ratio of titanium sulfate: urea: ethanol: deionized water = 2:0.8:8:60, and stir at 40°C for 2 hours, then add acetyl Acetone, solution A was obtained after stirring at room temperature for 0.4 h. Wherein, the addition of acetylacetone is 1.5% of the solution A quality.

[0029] 2) Add concentrated nitric acid with a mass fraction of 65% to solution A dropwise at 40°C, and fully react to obtain solution B after dropping and stirring for 2 hours. Wherein, the mass of concentrated nitric acid is 0.2% of solution B mass.

[0030] 3) At room temperature, the K 2 WO 4 2H 2 O was dissolved in deionized water to prepare K with a concentration of 0.2 mol / L 2 WO 4 aqueous solution, after magnetic stirring for 20 minutes, the pH value was adjusted to 3.0 with 3 mol / L hydrochloric acid to obtain solution C.

[0031] 4) According to the molar ratio of Ti and W elements n Ti :n W =x: (100-x), ...

Embodiment 2

[0038] 1) Mix titanium sulfate, urea, ethanol, and deionized water according to the mass ratio of titanium sulfate: urea: ethanol: deionized water = 2:0.8:8:60, stir at 40°C for 2 hours, and then add acetylacetone , solution A was obtained after stirring at room temperature for 0.4 h. Wherein, the addition of acetylacetone is 1.5% of the solution A quality.

[0039] 2) Add concentrated nitric acid with a mass fraction of 65% to solution A dropwise at 40°C, and fully react to obtain solution B after dropping and stirring for 2 hours. Wherein, the mass of concentrated nitric acid is 0.3% of solution B mass.

[0040] 3) At room temperature, the K 2 WO 4 2H 2 O was dissolved in deionized water to prepare K with a concentration of 0.2 mol / L 2 WO 4 aqueous solution, after magnetic stirring for 20 minutes, the pH value was adjusted to 3.0 with 3 mol / L hydrochloric acid to obtain solution C.

[0041] 4) By element molar ratio n Ti :n W =x: (100-x), where x=70, mix solution B ...

Embodiment 3

[0043] 1) Mix titanium sulfate, urea, ethanol, and deionized water according to the mass ratio of titanium sulfate: urea: ethanol: deionized water = 2:0.8:8:60, stir at 40°C for 2 hours, and then add acetylacetone , solution A was obtained after stirring at room temperature for 0.4 h. Wherein, the addition of acetylacetone is 1.5% of the solution A quality.

[0044] 2) Add concentrated nitric acid with a mass fraction of 65% to solution A dropwise at 40°C, stir for 2 hours and fully react to obtain solution B. Wherein, the mass of concentrated nitric acid is 0.3% of solution B mass.

[0045] 3) At room temperature, the K 2 WO 4 2H 2 O was dissolved in deionized water to prepare K with a concentration of 0.2 mol / L 2 WO 4 aqueous solution, after magnetic stirring for 20 minutes, the pH value was adjusted to 3.0 with 3 mol / L hydrochloric acid to obtain solution C.

[0046] 4) According to the molar ratio of Ti and W elements n Ti :n W =x: (100-x), where x=50, mix solutio...

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Abstract

A kind of TiO 2 / WO 3 The preparation method of composite powder is to mix titanium sulfate, urea, ethanol, and deionized water evenly, then add acetylacetone, and stir evenly at room temperature to obtain solution A; add concentrated nitric acid to solution A to obtain solution B; K is 0.1~0.3mol / L 2 WO 4 aqueous solution, and then adjust the pH value to 1 to 3.5 to obtain solution C; mix solution B and solution C for hydrothermal reaction to obtain TiO 2 / WO 3 Composite powder. In the present invention, due to titanium sulfate, K 2 WO 4 ·2H 2 O and the like are raw materials, and the price is low, so the preparation cost is low. In the present invention, a solution containing Ti and W is prepared first, and the product can be obtained by a one-step hydrothermal method, which has the advantages of low reaction temperature and short cycle. Due to the adoption of the hydrothermal method, the present invention can prepare TiO with controllable morphology, high purity, fine particles and relatively uniform particle size. 2 / WO 3 Composite powder.

Description

technical field [0001] The invention belongs to the technical field of composite powder preparation, and in particular relates to a shape-controllable TiO 2 / WO 3 Preparation method of composite powder. Background technique [0002] TiO 2 It has the advantages of stable chemical properties, corrosion resistance, acid and alkali resistance, low price, and abundant reserves. But TiO 2 The band gap is large, and it can only absorb ultraviolet light <387nm, and ultraviolet light only accounts for about 4% of the total sunlight, making the semiconductor's utilization rate of sunlight not high. In addition, TiO 2 The generated electrons and holes are very easy to recombine, making the photocatalytic activity not high. For these shortcomings it is necessary to Ti0 2 Modification and modification are carried out, and the composite product after modification or modification can effectively improve the utilization rate of sunlight. [Xie Yanzhao, Lin Ruijun, Zhao Lin, etc. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/30B01J20/06B01J20/30C02F1/30C02F1/28
Inventor 黄剑锋王彩薇曹丽云孔新刚张博烨刘倩倩宋倩茜刘雨洋罗兰李学林姚思源
Owner 广西自贸区见炬科技有限公司
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