Preparation method of titanium dioxide powder with big particle diameter

A technology of titanium dioxide and large particle size, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of inappropriate domestic sales and high cost, and achieve the effects of low cost, easy control of synthesis conditions, and low production cost

Inactive Publication Date: 2011-02-16
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on the preparation of each research group, and the high-level research mainly uses the 400nm titanium dioxide powder produced by Nikki Catalytic Chemicals Co., Ltd., however, the cost of the titanium dioxide powder is very expensive, and it is not available for domestic sales.

Method used

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  • Preparation method of titanium dioxide powder with big particle diameter
  • Preparation method of titanium dioxide powder with big particle diameter

Examples

Experimental program
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Effect test

Embodiment 1

[0012] Step 1: Under the condition of 15-20°C, mix titanyl sulfate with water to form a titanyl sulfate solution with a titanium ion concentration of 4mol / L, and then let stand for 12 hours;

[0013] Step 2: After clarifying and filtering the titanyl sulfate solution obtained in step 1, add 1 mol / L ammonia water to it, the molar ratio of the titanyl sulfate solution to ammonia water is 1:3, after the reaction is completed, a white precipitate appears and then wash the white precipitate until no sulfate remains;

[0014] Step 3: Separate the white precipitate in step 2, mix it with polyethylene glycol, citric acid and hydrogen peroxide at 30-80°C for peptization reaction, wherein, Ti 4+ , the molar ratio of polyethylene glycol, citric acid and hydrogen peroxide is 1:0.1:2:2, and then stand and age at 80°C for 12 hours to obtain a titanium dioxide gel;

[0015] Step 4: heat-treat the titanium dioxide gel obtained in step 3 at 1000° C. for 24 hours to obtain titanium dioxide pow...

Embodiment 2

[0017] Step 1: Under the condition of 15-20°C, mix titanyl sulfate with water to form a titanyl sulfate solution with a titanium ion concentration of 1 mol / L, and then let stand for 12 hours;

[0018] Step 2: After clarifying and filtering the titanyl sulfate solution obtained in step 1, add 1 mol / L ammonia water to it, the molar ratio of the titanyl sulfate solution to ammonia water is 1:6, after the reaction is completed, a white precipitate appears and then wash the white precipitate until no sulfate remains;

[0019] Step 3: Separate the white precipitate from step 2, mix it with polyethylene glycol, oxalic acid and hydrogen peroxide at 45°C for peptization reaction, wherein, Ti 4+ , the molar ratio of polyethylene glycol, oxalic acid and hydrogen peroxide is 1:0.1:10:10, and then stand and age at 30°C for 12 hours to obtain a titanium dioxide gel;

[0020] Step 4: heat-treat the titanium dioxide gel obtained in step 3 at 500° C. for 24 hours to obtain titanium dioxide po...

Embodiment 3

[0022] Step 1: Under the condition of 15-20°C, mix titanyl sulfate with water to form a titanyl sulfate solution with a titanium ion concentration of 2mol / L, and then let stand for 12 hours;

[0023] Step 2: After clarifying and filtering the titanyl sulfate solution obtained in step 1, add 1 mol / L ammonia water to it, the molar ratio of the titanyl sulfate solution to ammonia water is 1:5, after the reaction is completed, a white precipitate appears and then wash the white precipitate until no sulfate remains;

[0024] Step 3: Separate the white precipitate from step 2, mix it with polyethylene glycol, organic acid and hydrogen peroxide at 60°C for peptization reaction, wherein, Ti 4+ , the molar ratio of polyethylene glycol, organic acid and hydrogen peroxide is 1:0.1:4:4, and then stand and age at 50°C for 12 hours to obtain a titanium dioxide gel;

[0025] Step 4: heat-treat the titanium dioxide gel obtained in step 3 at 800° C. for 24 hours to obtain titanium dioxide pow...

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Abstract

The invention provides a preparation method of titanium dioxide powder with big particle diameters, which comprises the following steps of: firstly, adding 1mol / L of ammonia water into a titanyl sulfate solution with the titanium ion concentration of 1-4mol / L to obtain a white precipitate after the reaction is completed; then washing the white precipitate until no sulfate radical remains; then mixing the white precipitate with polyethylene glycol, an acid solution and hydrogen peroxide at the temperature of 30-80 DEG C to carry out peptizing reaction; then standing and aging for 12h at the temperature of 30-80 DEG C to obtain a titanium dioxide gel; and finally carrying out thermal treatment on the titanium dioxide gel for 18-24h at the temperature of 500-1,000 DEG C to obtain the titanium dioxide powder suitable for dye sensitization solar cell light scattering.

Description

technical field [0001] The invention belongs to the field of new material technology and new energy technology, and relates to a preparation method of large-diameter titanium dioxide powder. Background technique [0002] As an important semiconductor material, titanium dioxide is widely used in dye-sensitized solar cells and photocatalysis-related fields. To improve the photoelectric performance of dye-sensitized solar cells, improving the utilization rate of sunlight by photoanodes is an effective way One (Kuang, D.; Wang, P.; Ito, S.; Zakeeruddin, S.M.; Gratzel, M.J. Am. Chem. Soc., 2006, 128:7732-7745). [0003] Domestic and foreign research (Barb é C.J., Arendse F., Comte P., Jirousek M., Lenzmann F., Shklover V., M., J. Am. Ceram. Soc. 1997, 80, 3157-3171, M. Chem. Lett, 2005, 34(1): 8-13) indicated that the light scattering layer of titanium dioxide with large particle size can effectively improve the photoelectric performance of the battery. However, there are fe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053
Inventor 刘文秀
Owner IRICO
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