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Method for preparing photocatalyst ceramic by means of potassium tetratitanate whiskers

A technology of photocatalytic ceramics and potassium tetratitanate, applied in ceramic products, applications, household appliances, etc., can solve the problems of reduced photocatalytic efficiency, difficult application, weak film strength and impact resistance, and achieve low energy cost, Less secondary pollution, environmentally friendly effect

Inactive Publication Date: 2015-10-28
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the problem of photocatalyst loading and separation and recovery has always been one of the reasons that limit the further expansion of the application of photocatalytic active agents.
Although this invention makes the catalyst into a thin film, it is beneficial to the recovery of the catalyst, but its photocatalytic efficiency is greatly reduced, and the strength and impact resistance of the film are very weak, and it is difficult to obtain practical applications.

Method used

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  • Method for preparing photocatalyst ceramic by means of potassium tetratitanate whiskers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 27 g of potassium tetratitanate whiskers, and after ball milling in a ball mill for 15 hours, the whisker aspect ratio is measured to be about 7. Take a certain mass of potassium tetratitanate whiskers and add deionized water to prepare a mixture with a solid content of 30 wt%. Slurry, then add silane coupling agent (silane coupling agent and potassium tetratitanate whisker are 3:1000 by mass ratio), stir on magnetic stirrer for 5h, use vacuum suction filter and dry in oven Dry it for later use; use the modified whisker and add deionized water to prepare a ceramic slurry with a solid content of 44wt%, and add 0.8g of low-temperature glass powder as a binder, and then use 1mol / L NaOH solution to adjust pH to 11, stir on a magnetic stirrer at high speed for 3 hours to fully disperse potassium tetratitanate whiskers in deionized water, add 0.6g ethyl gallate as whisker surface modifier, stir on a magnetic stirrer at low speed 1h. Then use a frequency conversion mixe...

Embodiment 2

[0030] Weigh 30 g of potassium tetratitanate whiskers, and after ball milling in a ball mill for 15 hours, the whisker length-to-diameter ratio is measured to be about 7. Take a certain mass of potassium tetratitanate whiskers and add deionized water to prepare a mixture with a solid content of 30 wt%. Slurry, then add silane coupling agent (silane coupling agent and potassium tetratitanate whisker are 3:1000 by mass ratio), stir on magnetic stirrer for 5h, use vacuum suction filter and dry in oven Dry and set aside; then use the modified whiskers, add deionized water to prepare a ceramic slurry with a solid content of 47wt%, and add 1g of low-temperature glass powder as a binder, and then adjust the pH with 1mol / L NaOH solution To 11, stir at high speed on a magnetic stirrer for 5 hours to fully disperse potassium tetratitanate whiskers in deionized water, add 0.54 g of propyl gallate as a whisker surface modifier, and stir at low speed on a magnetic stirrer for 1 hour . The...

Embodiment 3

[0033]Weigh 24 g of potassium tetratitanate whiskers, and after ball milling in a ball mill for 15 hours, the whisker aspect ratio is measured to be about 7. Take a certain mass of potassium tetratitanate whiskers and add deionized water to prepare a mixture with a solid content of 30 wt%. Slurry, then add silane coupling agent (silane coupling agent and potassium tetratitanate whisker are 3:1000 by mass ratio), stir on magnetic stirrer for 5h, use vacuum suction filter and dry in oven Dry and set aside; then use the modified whiskers, add deionized water to prepare a ceramic slurry with a solid content of 42wt%, and add 0.6g of low-temperature glass powder as a binder, and then use 1mol / L NaOH solution to adjust pH to 10, stir at high speed on a magnetic stirrer for 4 hours to fully disperse potassium tetratitanate whiskers in deionized water, add 0.54g ethyl gallate as whisker surface modifier, stir at low speed on a magnetic stirrer 1h. Then use a frequency conversion mixe...

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Abstract

The invention relates to a method for preparing photocatalyst ceramic by means of potassium tetratitanate whiskers. The method comprises the following steps that 1, the potassium tetratitanate whiskers serve as main raw materials, and after ball milling is performed on the potassium tetratitanate whiskers in a ball mill, surface modification treatment is performed on the potassium tetratitanate whiskers with a silane coupling agent; 2, ceramic slurry is prepared by using the modified potassium tetratitanate whiskers and deionized water, a binder, low temperature glass powder, is added, a pH value is regulated with a NaOH solution, and high-speed stirring is performed in a magnetic stirrer; 3, short-chain amphiphilic molecules are added, and low-speed stirring is performed; 4, high-speed stirring is performed to foam, when big bubbles start to disappear, the high gear is switched to the low gear, and stirring is performed to obtain uniform and fine foam; 5, injection molding forming is performed, moldings are placed in a drying oven to be dried and then taken out after being cooled to the room temperature, and then the moldings are placed in a high-temperature furnace to be fired into porous ceramic according to the set sintering schedule. Due to the fact that catalytic degradation is performed on toxic organic pollutants by means of cheap and clean sunlight, the method for preparing the photocatalyst ceramic by means of the potassium tetratitanate whiskers has the advantages of being efficient, little in secondary pollution, friendly to environment, low in energy cost and the like.

Description

technical field [0001] The invention belongs to the field of structural catalysts, and in particular relates to a method for preparing photocatalytic ceramics by utilizing potassium tetratitanate whiskers. Background technique [0002] With the development of industry, the already limited water resources of human beings are increasingly polluted. Removing toxic and harmful chemical substances in water bodies, such as halogenated hydrocarbons, pesticides, surfactants, etc., has become an important task in the field of environmental protection. The photocatalytic oxidation method can quickly and completely oxidize hydrocarbons, halogenated substances, hydroxy acids, surfactants, dyes, nitrogen-containing organic substances, organophosphorus pesticides, etc. in water to CO 2 and H 2 O and other harmless substances. Photocatalytic degradation technology can be carried out under normal temperature and pressure, and can completely destroy organic matter. There is no secondary ...

Claims

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Application Information

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IPC IPC(8): C04B38/00C04B35/462
Inventor 吉晓莉胡鹏飞易芳
Owner WUHAN UNIV OF TECH
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