Preparation method of photocatalytic foam 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, limited load of foamed ceramics, inability to greatly improve photocatalytic efficiency, etc., and achieves increased contact area, Improve photocatalytic performance, the effect of short cycle

Inactive Publication Date: 2017-10-27
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Preparation method of photocatalytic foam ceramics
  • Preparation method of photocatalytic foam 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 20min, filter with suction, and dry; 30g of the obtained modified potassium ...

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 23.75 g of modified potassium tetratitanate whiskers, 1.2...

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 15 minutes, filter with suction, and dry; take 31.5g of modified potassium tetratitanate whiskers, ...

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Abstract

The invention relates to a preparation method of photocatalytic foam ceramics, which comprises the following steps: (1) treatment of potassium tetratitanate raw powder; (2) modification of stearic acid; (3) pretreatment of polyurethane foam; (4) ) preparation of primary slurry; (5) primary slurry; (6) preparation of secondary slurry; (7) secondary slurry; (8) sintering and cooling to obtain photocatalytic foamed ceramics. Compared with the prior art, the present invention has the following advantages: through ball milling, water washing, stearic acid modification, and adding dispersant, the solid content of potassium tetratitanate slurry can reach 75%; The prepared foam ceramic realizes the immobilization of the photocatalyst, and its three-dimensional network structure increases the contact area between the particles and the organic matter, and improves the photocatalytic performance; and directly hangs the slurry on the foam ceramic, the preparation method is simple, and no secondary sintering is required. , the cycle is short and the cost is low; at the same time, the low temperature glass is used as the binder to solve the phase transition of potassium tetratitanate at high temperature.

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 Patents(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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