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Molecular sieve photonic crystal film, preparation method and application thereof in detection of steam type and concentration

A photonic crystal, molecular sieve technology, applied in molecular sieves and alkali exchange compounds, chemical instruments and methods, phase influence characteristic measurement, etc., to achieve the effect of low cost, cost green and environmental protection

Pending Publication Date: 2022-02-25
启东海奥华环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, self-assembly of photonic crystal materials using molecular sieve colloidal nanoparticles as the basic structural unit has not been reported.

Method used

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  • Molecular sieve photonic crystal film, preparation method and application thereof in detection of steam type and concentration
  • Molecular sieve photonic crystal film, preparation method and application thereof in detection of steam type and concentration
  • Molecular sieve photonic crystal film, preparation method and application thereof in detection of steam type and concentration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1: Preparation of a molecular sieve photonic crystal film 1

[0047] (1) 13.10 g of tetramethylammonium hydroxide aqueous solution with a mass fraction of 25 wt % and 6.10 g of a sodium hydroxide aqueous solution with a mass fraction of 0.70 wt % were mixed and stirred evenly, then 1.0 g of silicic acid was added, heated and stirred at 50° C. until completely dissolved. After cooling to room temperature, add 0.5 g of aluminum isopropoxide and stir until dissolved. The obtained solution was aged at 25° C. for 12 hours, and then heated and crystallized at 60° C. for 48 hours in a flask. Finally, the crystallized product was repeatedly centrifuged and ultrasonically washed to obtain the LTA-type molecular sieve colloidal nanoparticle seed crystal particle 1, which was then dispersed in water to form an LTA-type molecular sieve colloidal nanoparticle seeding liquid 1 with a mass fraction of 2 wt%.

[0048] (2) 0.00g mass fraction of 2wt% LTA molecular sieve colloi...

Embodiment 2

[0051] Example 2: Preparation of a molecular sieve photonic crystal film 2

[0052] (1) The operation method is the same as in Example 1.

[0053] (2) 2.54g, mass fraction of 2wt% LTA molecular sieve colloidal nanoparticle seed liquid 1 and 4.23g, mass fraction of 0.70wt% sodium hydroxide aqueous solution were mixed uniformly at a mass ratio of 0.6:1, and then 1.1 g silicic acid, heated and stirred at 60°C until completely dissolved. After cooling to room temperature, add 0.8g of aluminum isopropoxide and stir to dissolve. The obtained solution was aged at 25° C. for 12 hours, and then placed in a flask and heated at 60° C. for 24 hours for crystallization. Finally, the crystallized product was repeatedly centrifuged and ultrasonically washed to obtain LTA molecular sieve colloidal nanoparticles 2, and then dispersed in water to form LTA molecular sieve colloidal nanoparticle solution 2 with a mass fraction of 6 wt%.

[0054] (3) Draw 5 mL of the LTA-type molecular sieve co...

Embodiment 3

[0056] Example 3: Preparation of a molecular sieve photonic crystal film 3

[0057] (1) The operation method is the same as in Example 1.

[0058] (2) 2.35g, mass fraction of 2wt% LTA molecular sieve colloidal nanoparticle seed liquid 1 and 4.70g, mass fraction of 0.70wt% sodium hydroxide aqueous solution were mixed uniformly at a mass ratio of 0.5:1, and then 1.2 g silicic acid, heated and stirred at 60°C until completely dissolved. After cooling to room temperature, 1.0 g of aluminum isopropoxide was added and stirred to dissolve. The obtained solution was aged at 30° C. for 24 hours, and then placed in a flask and heated at 60° C. for 24 hours for crystallization. Finally, the crystallized product was repeatedly centrifuged and ultrasonically washed to obtain LTA molecular sieve colloidal nanoparticles 3 , and then dispersed in water to form an LTA molecular sieve colloidal nanoparticle solution 3 with a mass fraction of 5 wt %.

[0059] (3) Draw 5 mL of the LTA molecula...

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Abstract

The invention discloses a molecular sieve photonic crystal film, a preparation method and application thereof in detection of steam type and concentration, and belongs to the technical field of molecular sieve metamaterials. According to the invention, molecular sieve colloidal nanoparticles are used as basic structure elements for the first time, and the molecular sieve photonic crystal film is obtained by an inclined deposition self-assembly method. The particle size of the molecular sieve colloidal nanoparticles used in the invention is adjustable in a range of 80-300nm, and the obtained molecular sieve photonic crystal film has an adjustable structural color in the whole visible light region from blue to red, and shows the characteristic of angle dependence. The range of a reflection photon forbidden band is 200-850nm, and the band is from a near ultraviolet region to a near infrared region; the photonic forbidden band of the activated molecular sieve photonic crystal film has visual and dynamic reversible response capability to various steam, such as air with different relative humidity, acetone, n-hexane, n-butyl alcohol, cyclohexane and the like. The method is simple, environment-friendly and low in energy consumption, and the molecular sieve can be applied to the fields of optics, sensing and the like.

Description

technical field [0001] The invention belongs to the technical field of molecular sieve metamaterials, and in particular relates to a molecular sieve photonic crystal film formed by spontaneous assembly and accumulation of molecular sieve nanocrystals, a preparation method and its application in detecting the type and concentration of steam. Background technique [0002] Molecular sieve is a kind of crystalline aluminosilicate with regular micropore structure, its pore size is usually 0.4~1.2nm, it has certain acidity, hydrothermal stability and high specific surface area, and it is used in catalysis (petroleum refining, MTO, etc.) , Gas adsorption and separation, ion exchange and many other fields have a wide range of applications [Ref.Chem.Soc.Rev.2019,48,1095]. With the development of disciplines such as nanochemistry, supramolecular chemistry, and structural materials and the advancement of technology, molecular sieves have a wider range of applications, such as low diele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/48C01B39/04G01N21/41G01N21/81
CPCC01B39/48C01B39/04G01N21/41G01N21/81C01P2002/72C01P2004/03C01P2006/60C01P2002/84
Inventor 陶佳伟娄悦彭宇马金鑫娄柏臣
Owner 启东海奥华环保科技有限公司
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