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Zinc titanate micro-nano photocatalysis material and preparation method thereof

A photocatalytic material, zinc titanate technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of adding surfactants, complex preparation process, Unfavorable problems such as industrial production, to achieve the effect of reducing the preparation cost, the preparation method is simple, and the production cost is reduced

Active Publication Date: 2010-06-02
广州远达环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, a relatively expensive organic titanium source needs to be used, a surfactant needs to be added, and the entire preparation process is relatively complicated, which is not conducive to large-scale industrial production

Method used

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  • Zinc titanate micro-nano photocatalysis material and preparation method thereof
  • Zinc titanate micro-nano photocatalysis material and preparation method thereof
  • Zinc titanate micro-nano photocatalysis material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Weigh 2.00g industrial grade common TiO 2powder, add 20mL ammonia water with a mass concentration of 10% while stirring, ultrasonically disperse for 1 hour, transfer to a 50mL polytetrafluoroethylene bottle with a screw cap and seal it, and continue stirring at 50°C for 3 hours to obtain a white suspension A ; Then 681.5mL concentration of 5g / L zinc chloride aqueous solution is slowly poured into the white suspension A with the zinc salt solution under rapid stirring to obtain the white suspension B; then the white suspension B is moved into a closed autoclave, After being treated at 50°C and 0.5MPa for 2 hours under continuous stirring, take it out and repeatedly centrifuge and wash with deionized water until the ammonium ions and chloride ions are completely removed to obtain precursor C; After the wind is completely dry, transfer to a crucible electric furnace and roast at 800°C for 2 hours, and ball mill the roasted product to obtain zinc titanate powder. The prepa...

Embodiment 2

[0037] Weigh 1.50g industrial grade common TiO 2 powder, add 15mL ammonia water with a mass concentration of 15% while stirring, ultrasonically disperse for 0.5 hours, transfer to a 50mL polytetrafluoroethylene bottle with a screw cap and seal, and continue stirring at 100°C for 1 hour to obtain a white suspension A ; Then 539.0mL concentration of 10g / L zinc sulfate aqueous solution is slowly poured into the white suspension A with the zinc salt solution under rapid stirring to obtain the white suspension B; then the white suspension B is moved into a closed autoclave, After being treated at 65°C and 1.0MPa for 1.5 hours under continuous stirring, take it out and repeatedly centrifuge and wash with deionized water until the ammonium ions and sulfate ions are completely removed to obtain the precursor C; finally, the precursor C is freeze-dried , transferred to a crucible electric furnace and roasted at 600 ° C for 4 hours, and ball milled the roasted product to obtain zinc tit...

Embodiment 3

[0040] Weigh 3.50g industrial grade common TiO 2 powder, add 35mL of 15% ammonia water while stirring, ultrasonically disperse for 2 hours, transfer to a 50mL polytetrafluoroethylene bottle with a screw cap and seal it, and keep stirring at 85°C for 2 hours to obtain a white suspension A; then 597mL The zinc nitrate aqueous solution with a concentration of 20g / L was slowly poured into the white suspension A under rapid stirring to obtain the white suspension B; then, the white suspension B was moved into a closed autoclave, and kept stirring at 75 After treatment at ℃ and 1.2MPa for 2 hours, take it out and repeatedly centrifuge and wash it with deionized water until the ammonium ions and nitrate ions are completely removed to obtain the precursor C; finally freeze-dry the precursor C and transfer it to a crucible electric furnace Calcined at 550°C for 3.5 hours, ball milled the calcined product to obtain zinc titanate powder. The prepared zinc titanate has a spherical struct...

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Abstract

The invention relates to a catalyst which is relevant to zinc and titanium and a chemical method for preparing the catalyst. The zinc titanate micro-nano photocatalysis material has a spheroid structure with a plurality of protrusions. The preparation method of the zinc titanate micro-nano photocatalysis material comprises the following steps of: mixing uniform concentrated ammonia water suspension A of TiO2; slowly adding a zinc salt solution or ZnO powder into the suspension A in the titanium / zinc molar ratio of 1:1 to obtain uniform suspension B; processing the suspension B at high temperature and high pressure and then centrifugally washing the suspension B with deionized water many times to obtain a precursor C; drying the precursor C, burning at high temperature, and finally ball-milling. The prepared material has high specific surface area which reaches 160.6m2 / g and has stronger visible light photocatalysis performance. The preparation method has low production cost and is suitable for scale industrial production.

Description

【Technical field】 [0001] The present invention relates to a catalyst related to zinc and titanium, and a chemical process for preparing the catalyst. 【Background technique】 [0002] Since Japanese scholars discovered in 1972 that light irradiation on titanium dioxide electrodes can split water into hydrogen and oxygen, which is called the "Hondo-Fujishima effect", TiO 2 The representative photocatalytic material (commonly known as photocatalyst) has developed rapidly. After more than 30 years of research and development, nano-sized TiO has been developed. 2 , ZnO, SnO 2 , ZrO 2 , MnO 2 , CdS and other photocatalytic materials, these photocatalytic materials are not only widely used in organic synthesis, but more importantly, because of their excellent photocatalytic oxidation performance, they can convert organic dyes, formaldehyde, benzene and benzene VOCs, ammonia, volatile organic compounds (TVOC), etc. are oxidized and decomposed into harmless carbon dioxide, water, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06
Inventor 吴振军林娟袁剑民
Owner 广州远达环保科技有限公司
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