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Process for preparing TiO2 (titanium dioxide) film on aluminum-oxide foamed ceramic

A foamed ceramic, alumina technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of photocatalytic efficiency catalyst immobilization and other problems, achieve good acid and alkali corrosion resistance, good resistance High temperature and oxidation resistance, the effect of increasing the effective area

Inactive Publication Date: 2012-10-24
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can well solve the problem of photocatalytic efficiency and the immobilization of catalysts under extremely harsh conditions.

Method used

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  • Process for preparing TiO2 (titanium dioxide) film on aluminum-oxide foamed ceramic
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  • Process for preparing TiO2 (titanium dioxide) film on aluminum-oxide foamed ceramic

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Effect test

Embodiment 1

[0032] The specific operation of the preparation of alumina slurry is as follows:

[0033] Select deionized water as the dispersant, and divide the added deionized water into two parts, add 2wt% ammonium polyacrylate as a dispersant to one part of the deionized water, ultrasonically vibrate for 10 minutes, and add 0.5 wt% to the other part of the deionized water wt% carboxymethyl cellulose and disperse it evenly; then use ammonia water to adjust the pH value of the well-mixed ammonium polyacrylate solution to about 11, then add 2wt% silica sol, and ultrasonically oscillate for 10 minutes to mix the evenly mixed ceramic powder Stir in ingredients until lumpy. Finally, pour the carboxymethyl cellulose aqueous solution into it and stir evenly to obtain a ceramic slurry with a solid content of 70 wt%. Then pour the ceramic slurry into a closed round bottle, put it on a homemade drum mixer, roll and stir for 24 hours, pour it out and put it in a beaker. The polyurethane foam acti...

Embodiment 2

[0038] (1) Preparation of alumina foam ceramic substrate;

[0039] 1) Preparation of alumina slurry:

[0040] a) Configure alumina powder: mix 75% alumina, 10% silica, 7% kaolin, 3% bentonite and 5% talc according to the mass ratio to obtain alumina powder;

[0041] b) Configuration solution A: According to the mass percentage of alumina powder, take 2% ammonium polyacrylate, add it to deionized water, and ultrasonically oscillate for 10-20 minutes, then adjust the pH value of the solution to 11 with ammonia water, Then add 2% silica sol, and then ultrasonically oscillate evenly to obtain solution A;

[0042] c) Prepare solution B: according to the mass percentage of alumina powder, take 0.5% carboxymethyl cellulose, add it into deionized water and mix evenly to obtain solution B;

[0043] d) Add alumina powder into solution A, stir until lumpy, and then add solution B to obtain alumina slurry; the mass ratio of the total amount of deionized water to the total amount of alum...

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Abstract

The invention discloses a process for preparing a TiO2 (titanium dioxide) film on aluminum-oxide foamed ceramic. The process adopts a concrete implementation scheme that coating aluminum oxide slurry is coated on a foam rib by dipping and extruding, then foam is burned up, and finally, the aluminum-oxide foamed ceramic with high porosity is obtained in a high-temperature sintering manner; Ti collosol is uniformly coated on a pore wall of an aluminum-oxide foamed ceramic carrier by negative-pressure infiltration; and the TiO2 film which is uniformly and continuously distributed on the pore wall of the aluminum-oxide foamed ceramic is prepared by drying and thermal treatment. According to materials disclosed by the invention, the porous aluminum-oxide foamed ceramic serves as a base body; meanwhile, the base body has good resistance to acid and alkali corrosion due to the stable chemical properties of the Al2O3 (aluminum oxide) ceramic; in addition, the carrier material has good high-temperature resistance and oxidation resistance by virtue of a high-melting point of the Al2O3 ceramic. These properties of the materials well meet the requirements on properties of catalysts and the carrier which are used for purifying industrial wastewater, domestic sewage and toxic waste gas in extremely serious corrosive environments.

Description

technical field [0001] The invention belongs to the technical field of ceramic coating, and relates to a method for preparing TiO on ceramics. 2 Thin film technology, especially a uniformly distributed, photocatalytic and nano-scale TiO on the alumina foam ceramic substrate 2 Film preparation process. Background technique [0002] With the continuous advancement of my country's industrialization and urbanization, the impact on the environment is getting deeper and deeper. The problem of environmental pollution has also become more and more prominent, and has gradually become a stumbling block restricting the rapid development of my country's economy. At the same time, the improvement of people's living standards also requires a good living environment. For this reason, the purification treatment of industrial wastewater, domestic sewage, and toxic waste gas has become an urgent problem to be solved. Most of the substances such as industrial wastewater and domestic sewage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06
Inventor 桑可正曾德军樊张增薛岳来萌
Owner CHANGAN UNIV
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