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Method for preparing photocatalytic foamed ceramics

A foamed ceramic and photocatalytic technology, which is applied in the field of photocatalytic foamed ceramics preparation, can solve the problems of high energy consumption, inability to greatly improve the photocatalytic efficiency, limited load of foamed ceramics, etc. Photocatalytic performance, low cost effect

Inactive Publication Date: 2015-12-02
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Secondary sintering is required, the energy consumption is high, and the loading capacity of foam ceramics is limited, so the photocatalytic efficiency cannot be greatly improved

Method used

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  • Method for preparing photocatalytic foamed ceramics
  • Method for preparing photocatalytic foamed ceramics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Put the polyurethane foam in 10wt% NaOH solution, treat it at 60°C for 4 hours, rub and wash it repeatedly, then soak the foam in a certain concentration of CMC for 24 hours, and dry it for later use; take 150g of potassium tetratitanate raw powder and place it in a 2L ball mill In the tank, according to the mass ratio of the ball to the material is 2:1, put the balls and the original powder of potassium tetratitanate in the ball mill tank for ball milling for 10 hours, take out the milled potassium tetratitanate powder, wash it repeatedly with deionized water, and vacuum filter , dry; take 100 g of potassium tetratitanate whiskers after washing and drying, add deionized water to disperse them, add stearic acid relative to the mass of potassium tetratitanate whiskers in an amount of 1% to the suspension, and place it in a heat-collecting constant temperature Stir in a heating stirrer at 80°C for 20 min, filter with suction, and dry; 30 g of the obtained modified potassiu...

Embodiment 2

[0037]Put the polyurethane foam in 20wt% NaOH solution, treat it at 60°C for 2 hours, rub and wash it repeatedly, then soak the foam in a certain concentration of PVA for 24 hours, and dry it for later use; take 150g of potassium tetratitanate raw powder and place it in a 2L ball mill In the tank, according to the mass ratio of the ball to the material is 2:1, put the balls and the original powder of potassium tetratitanate in the ball mill tank for ball milling for 5 hours, take out the milled potassium tetratitanate powder, wash it repeatedly with deionized water, and vacuum filter , and dry; take 100 g of potassium tetratitanate whiskers washed and dried, add deionized water to disperse them, add stearic acid relative to the mass of potassium tetratitanate whiskers at 10% to the suspension, and place in a heat-collecting constant temperature Stir in a heating mixer at 100°C for 5 minutes, suction filter, and dry; take 23.75g of modified potassium tetratitanate whiskers, 1.25...

Embodiment 3

[0040] Put the polyurethane foam in 15wt% NaOH solution, treat it at 60°C for 3 hours, rub and wash it repeatedly, then soak the foam in a certain concentration of PVA for 24 hours, and dry it for later use; take 150g of potassium tetratitanate raw powder and place it in a 2L ball mill In the tank, according to the mass ratio of the ball to the material is 2:1, put the balls and the original powder of potassium tetratitanate in the ball mill tank for ball milling for 6 hours, take out the milled potassium tetratitanate powder, wash it repeatedly with deionized water, and vacuum filter , and dry; take 100 g of potassium tetratitanate whiskers washed and dried, add deionized water to disperse them, add stearic acid relative to the mass of potassium tetratitanate whiskers at 2% to the suspension, and place in a heat-collecting constant temperature Stir in a heating mixer at 85°C for 15min, filter with suction, and dry; take 31.5g of modified potassium tetratitanate whiskers, 3.5g ...

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Abstract

The invention relates to a method for preparing photocatalytic foamed ceramics. The method comprises the following steps: (1) treating potassium tetratitanate raw powder; (2) modifying stearic acid; (3) pre-treating polyurethane foam; (4) preparing primary slurry; (5) carrying out slurry coating for the first time; (6) preparing secondary slurry; (7) carrying out slurry coating for the second time; and (8) carrying out sintering, and cooling to obtain the photocatalytic foamed ceramics. Compared with the prior art, the method has the advantages that the solid content of potassium tetratitanate slurry can be 75 percent by means of ball milling, rinsing, modifying of stearic acid and adding of a dispersing agent; a photocatalyst is immobilized due to the foamed ceramics prepared by direct slurry coating on the polyurethane foam, the contact area between particles and organic matters is enlarged due to the three-dimensional reticular structure of the foamed ceramics, and the photocatlysis performance is improved; slurry coating is directly performed on the foamed ceramics, so that the preparation method is simple, does not need secondary sintering, and is short in cycle and low in cost; and phase change happening at high temperature of potassium tetratitanate is solved by using low-temperature glass as an adhesive.

Description

technical field [0001] The invention belongs to the field of structural catalysts, and in particular relates to a preparation method of photocatalytic foam ceramics. Background technique [0002] Today's society is facing global environmental pollution and destruction, which seriously restricts the pace of sustainable development of human society. The development of new materials with low environmental impact, renewable recycling or environmental purification is an important way to solve the crisis of human survival. Semiconductor photocatalysis technology uses cheap and clean sunlight to catalyze and degrade toxic organic pollutants, which has the advantages of high efficiency, less secondary pollution, environmental friendliness, and low energy cost. A large number of studies have shown that photocatalysis has deep reactivity at room temperature, and can treat wastewater containing fuel, pesticide halogenated organic compounds, surfactants, oil, and inorganic pollutants in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/462C04B38/06B01J21/06B01J32/00B01J35/04
Inventor 吉晓莉易芳胡鹏飞
Owner WUHAN UNIV OF TECH
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