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TiO2 photocatalyst, ceramic material containing TiO2 photocatalyst and preparation method of TiO2 photocatalyst

A technology for photocatalysts and ceramic materials, applied in the field of photocatalytic materials, can solve the problems of uneven distribution of nano-titanium oxide, weakening disinfection effect, influence of disinfection effect, etc., and achieves reduction of agglomeration, improvement of photocatalysis, and stabilization of TiO2 particles Effect

Active Publication Date: 2021-12-24
SHENZHEN TAOTAO TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the antibacterial ceramics on the market directly add nano-titanium oxide to the raw material. The ceramic material formed by this method is easy to form hard agglomeration. On the one hand, it will lead to uneven distribution of nano-titanium oxide in the ceramic material, and the disinfection effect will be affected; On the other hand, after nano-titanium oxide forms large particles, the anatase grains that can absorb photons are reduced, which weakens the disinfection effect

Method used

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  • TiO2 photocatalyst, ceramic material containing TiO2 photocatalyst and preparation method of TiO2 photocatalyst
  • TiO2 photocatalyst, ceramic material containing TiO2 photocatalyst and preparation method of TiO2 photocatalyst
  • TiO2 photocatalyst, ceramic material containing TiO2 photocatalyst and preparation method of TiO2 photocatalyst

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preparation example Construction

[0030] see figure 1 , the present invention also provides a TiO 2 The preparation method of photocatalyst, the preparation method comprises the following steps:

[0031] In step S1, a 50% ethanol solution is prepared and the pH value is adjusted to be greater than or equal to 9 to obtain an alkaline solution. Wherein, the 50% ethanol solution is prepared by configuring absolute ethanol and water at a volume ratio of 1:1. In the process of adjusting the pH value, ammonia water is added dropwise to 50% ethanol solution to adjust the pH value to be greater than or equal to 9.

[0032] In step S2, the TiO 2 The powder is added to the alkaline solution and mixed to obtain the first sol solution, optionally, TiO 2 The particle size of the powder is 20-500nm. Ultrasonic dispersion is used to disperse the first sol solution for 10-60 minutes, and after stirring for another 20-40 minutes under the condition of a constant temperature water bath at 40-70° C., after cooling, stand fo...

Embodiment

[0049] TiO 2 Preparation method of photocatalyst powder:

[0050] (1) Prepare absolute ethanol: water = 1:1 solution, add ammonia water dropwise until the pH of the solution is 9.

[0051] (2) Add TiO 2 Ultrasonic disperse the powder for 40 minutes, pour the solution into a three-necked bottle, and stir for another 40 minutes in a constant temperature water bath at 50°C. After the temperature of the water bath drops to room temperature, filter the solution in the bottle, and then wash it with absolute ethanol several times. Until the pH of the solution is 6-7, place it in an oven at 80 degrees Celsius and dry until the water content is lower than 5%, and the dried TiO 2 The powder is crushed and sieved, the mesh number of the sieve is 1000, and the sieved TiO 2 The particle size of the powder is below 10 microns.

[0052] (3) configure the mixed organic solution of dibasic carboxylic acid and dibasic ammonia, the volume fraction of dibasic carboxylic acid and dibasic ammon...

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Abstract

The invention provides a TiO2 photocatalyst, a ceramic material containing the TiO2 photocatalyst and a preparation method of the TiO2 photocatalyst. The preparation method of the TiO2 photocatalyst comprises the steps of modifying TiO2 in an alkaline environment to obtain first modified TiO2, then mixing the first modified TiO2 with an organic matter solution according to a mass ratio of (35-75): 100 under a certain condition to prepare the TiO2 photocatalyst, wherein the organic matter solution comprises at least one of dihydric alcohol, dicarboxylic acid, binary ammonia and 7-octyltrichlorosilane. According to the preparation method of the TiO2 photocatalyst, after TiO2 is modified twice, TiO2 agglomeration can be greatly reduced. In addition, the TiO2 photocatalyst retains a carbon frame structure of part of organic matter, photon receiving is facilitated, it can be guaranteed that most of titanium dioxide powder stably exists in an anatase phase, and the photocatalytic performance of the TiO2 photocatalyst is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, in particular to a TiO 2 Photocatalyst, comprising the TiO 2 Photocatalyst ceramic material and preparation method thereof. Background technique [0002] The photocatalytic property of the material can endow the material with good antibacterial properties. TiO2 is the most researched catalyst with catalytic properties. 2 , which is a naturally occurring photocatalyst with high catalytic activity, stable chemical properties, environmental friendliness and low cost. TiO 2 It mainly exists in three crystal forms: anatase, rutile and brookite. In the current research, it is found that in most cases, the anatase TiO 2 The photocatalytic activity is higher than others. But the TiO 2 In the melting process with other materials, TiO 2 The crystal form is unstable, and it is also prone to agglomeration, which cannot be uniformly integrated with the material. [0003] Ceramics are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047C04B35/48C04B35/622C04B35/638C04B35/64B01J21/06
CPCC01G23/08C04B35/48C04B35/622C04B35/638C04B35/64B01J21/063C04B2235/3232C04B2235/6567C04B2235/66C04B2235/666B01J35/39Y02W10/37
Inventor 李毅刘建国吴沙欧
Owner SHENZHEN TAOTAO TECH CO LTD
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