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Preparing method of light-degraded organic poisonous gas multi-stage nanometer composite

A nano-composite material, toxic gas technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problem of improving photocatalytic degradation of organic toxic gases, without increasing the enrichment of harmful gases, and limited improvement in the absorption range. and other problems, to achieve the effect of improved photodegradation efficiency, high energy utilization rate, and uniform void distribution.

Active Publication Date: 2019-05-31
南京森之语新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Titanium-based catalysts have a long history of research. It has been found that titanium dioxide has a good photocatalytic effect when it is below 20nm, but its effective light source is limited to ultraviolet light excitation, which limits its application. The research on element modification, specifically, the use of a noble metal or rare earth metal element to dope the anatase titanium dioxide catalyst can improve its photocatalytic stability, but the improvement in expanding its absorbing range is limited. At the same time, the doping of rare earth metal Impurities will also bring pollution of associated heavy metal ions, which cannot be completely healthy and environmentally friendly, and the current photocatalyst modification process does not increase the function of enriching harmful gases, so it cannot maximize the photocatalytic degradation of organic toxic gases. Based on the above problems, there is an urgent market demand for the research and development of a highly efficient, environmentally friendly, sustainable and controllable preparation of a nano-photocatalyst material that integrates enrichment / photodegradation

Method used

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  • Preparing method of light-degraded organic poisonous gas multi-stage nanometer composite

Examples

Experimental program
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Effect test

Embodiment 1

[0026] 10Kg of montmorillonite was pulverized by mechanical pulverization, the pulverization condition was 800rpm pulverization for 45min, and then pulverized once by airflow method, the pulverization pressure was 1.0MPa, and the gas flow rate was 3m 3 / min, the crushing efficiency is 20Kg / h, and the measured particle size is 180nm. Weigh 4g of titanium tetrachloride and add it to the processed 50g porous montmorillonite. The operating conditions are to add gradually and operate in a low temperature box. The operating temperature is 3 ℃, to obtain the complex, take 10g of the complex and add it to 100ml deionized water for low-temperature hydrolysis reaction. Reaction, reacted for 6 hours, and then added 1.5 g of triethanolamine after cooling down to normal temperature and stirred evenly to obtain a nanocomposite material.

[0027] Test: Take 0.1ml of the solution and add it to 10ml of formaldehyde solution, react under visible light for 0.5h, and the degradation rate of forma...

Embodiment 2

[0030] 10Kg of montmorillonite was pulverized by mechanical pulverization, the pulverization condition was 800rpm pulverization for 45min, and then pulverized once by airflow method, the pulverization pressure was 1.0MPa, and the gas flow rate was 3m 3 / min, the crushing efficiency is 20Kg / h, and the measured particle size is 180nm. Weigh 4g of titanium tetrachloride and add it to the processed 50g porous montmorillonite. The operating conditions are to add gradually and operate in a low temperature box. The operating temperature is 3 ℃, to obtain the complex, take 10g of the complex and add it to 100ml deionized water for low-temperature hydrolysis reaction. React, react for 6 hours, and then add 1.5 g of glycerol after cooling down to normal temperature and stir evenly to obtain a nanocomposite material.

[0031] Test: Take 0.1ml of the solution and add it to 10ml of formaldehyde solution, react under visible light for 0.5h, and the degradation rate of formaldehyde reaches 8...

Embodiment 3

[0033] 10Kg of montmorillonite was pulverized by mechanical pulverization, the pulverization condition was 800rpm pulverization for 45min, and then pulverized once by airflow method, the pulverization pressure was 1.0MPa, and the gas flow rate was 3m 3 / min, the crushing efficiency is 20Kg / h, and the measured particle size is 180nm. Weigh 4g of titanium tetrachloride and add it to the processed 50g porous montmorillonite. The operating conditions are to add gradually and operate in a low temperature box. The operating temperature is 3 ℃, to obtain the complex, take 10 g of the complex and add it to 100 ml of deionized water for low-temperature hydrolysis reaction, the reaction time is 30 min, the reaction temperature is 3 ° C, after the reaction, add 0.5 g of tris-diaminoethylamine with a particle size of 5 nm, React at 160° C. for 6 hours, then add 1.5 g of triethanolamine after cooling down to room temperature and stir evenly to obtain a nanocomposite material.

[0034] Test...

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Abstract

The invention discloses a preparing method of a light-degraded organic poisonous gas multi-stage nanometer composite. The preparing method includes the steps of preparing porous lamellar nanometer montmorillonite, smashing the montmorillonite through a mechanical smashing method and a gas flow method until the average particle size is 50-200 nm, primarily preparing the nanometer composite, compounding the montmorillonite and a titanium-series photocatalysis material at a low temperature to obtain a compound, adding the compound to water or alcohol for low-temperature reaction, adding a nitrogen source or carbon source for reaction to obtain a primary nanometer composite, modifying the multi-stage nanometer composite, cooling the primary nanometer composite, and then adding a modifier for modifying the composite, wherein the modifier accounts for 0.2-2% of the total mass of the compound, the water or alcohol and the nitrogen source or carbon source, and the modifier comprises glycerol or triethanolamine.

Description

technical field [0001] The invention belongs to the technical field of functional nanometer powders, and in particular relates to a method for preparing a multilevel nanocomposite material capable of photodegrading organic toxic gases. Background technique [0002] Titanium-based catalysts have a long history of research. It has been found that titanium dioxide has a good photocatalytic effect when it is below 20nm, but its effective light source is limited to ultraviolet light excitation, which limits its application. The research on element modification, specifically, the use of a noble metal or rare earth metal element to dope the anatase titanium dioxide catalyst can improve its photocatalytic stability, but the improvement in expanding its absorbing range is limited. At the same time, the doping of rare earth metal Impurities will also bring pollution of associated heavy metal ions, which cannot be completely healthy and environmentally friendly, and the current photoca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/16B01J27/22B01J27/24B01J35/10B01D53/86B01D53/72
Inventor 刘水平谭连江余媛王登虎王婷
Owner 南京森之语新材料科技有限公司
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