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Nano-composite material for catalytically decomposing formaldehyde at normal temperature and method for preparing nano-composite material

A nanocomposite material that catalyzes formaldehyde, applied in the field of air purification application materials, can solve problems such as difficult to use, small specific surface area, and limited catalytic activity of materials, and achieve the effect of huge specific surface area, high activity, and good dispersion

Active Publication Date: 2015-12-02
NINGBO TAIAN NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current catalyst materials are micron-sized stacked particles with a small specific surface area. During the catalytic reaction, only the surface particles work, and the internal particles are difficult to use, which greatly limits the catalytic activity of the material.

Method used

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  • Nano-composite material for catalytically decomposing formaldehyde at normal temperature and method for preparing nano-composite material
  • Nano-composite material for catalytically decomposing formaldehyde at normal temperature and method for preparing nano-composite material
  • Nano-composite material for catalytically decomposing formaldehyde at normal temperature and method for preparing nano-composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Dissolve 14.71g of manganese sulfate monohydrate, 2.50g of copper sulfate pentahydrate and 1.33g of cerium nitrate hexahydrate in 200mL of pure water, and fully stir to form a clear mixed salt solution; Alkyl trimethyl ammonium bromide was mixed and dissolved in 1000 mL of pure water to obtain a silicon source solution, and 14 mL of 1mol / L sodium hydroxide was added to adjust the pH of the solution to 9.0, and heated to 30 ° C; quickly add the above-mentioned silicon source solution to the above-mentioned silicon source solution. Mix the salt solution and stir vigorously; after the reaction for 2 hours, suction filter the mixed solution of metal salt and silicon source, disperse the obtained filter residue powder in 50°C ethanol solution under constant temperature stirring for 30 hours for dispersion treatment, and then suction filter; the above dispersion treatment After the filter residue powder was calcined at 800° C. for 0.5 h, a powdery substance was obtained, which...

Embodiment 2

[0044] Dissolve 0.42g of manganese nitrate tetrahydrate, 0.19g of copper sulfate pentahydrate and 0.03g of cerium nitrate hexahydrate in 200mL of pure water, and fully stir to form a clear mixed salt solution; 28.42g of sodium silicate nonahydrate and 0.20g of eighteen Alkyl trimethyl ammonium bromide is mixed and dissolved in 1000 mL of pure water to obtain a silicon source solution, and 10 mL of 1mol / L sodium hydroxide is added to adjust the pH of the solution to 8.0, and heated to 30 ° C; quickly add the above-mentioned silicon source solution to the above-mentioned silicon source solution. Mix the salt solution and stir vigorously; after the reaction for 0.5h, suction filter the mixed solution of metal salt and silicon source, disperse the obtained filter residue powder in 70°C ethanol solution and stir at constant temperature for 5h for dispersion treatment, and then suction filter; The treated filter residue powder was calcined at 300 °C for 5 hours to obtain a powdery su...

Embodiment 3

[0047] Dissolve 0.87g of manganese nitrate tetrahydrate, 0.20g of copper sulfate pentahydrate and 0.33g of cerium nitrate hexahydrate in 200mL of pure water, and fully stir to form a clear mixed salt solution; 28.42g of sodium silicate nonahydrate and 10.00g of eighteen Alkyl trimethyl ammonium bromide was mixed and dissolved in 1000 mL of pure water to obtain a silicon source solution, and 23 mL of 1mol / L sodium hydroxide was added to adjust the pH of the solution to 11.0, and heated to 30 ° C; quickly add the above-mentioned silicon source solution to the above-mentioned solution. Mix the salt solution and stir vigorously; after the reaction for 5 hours, suction filter the mixed solution of metal salt and silicon source, disperse the obtained filter residue powder in an ethanol solution at 30 °C, stir at constant temperature for 20 hours, and then suction filter; The filter residue powder was calcined at 400 °C for 3 hours to obtain a powdery substance, which was a nanocompos...

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Abstract

The invention relates to a nano-composite material for catalytically decomposing formaldehyde at the normal temperature and a method for preparing the nano-composite material. The method includes a preparing step for mixed liquor of metal salt and silicon sources, a precipitating step and a calcining step. The nano-composite material and the method have the advantages that the nano-composite material comprises silicon dioxide carriers with nano-scale ordered mesopore structures and accordingly has huge specific surface areas; large quantities of mixed metal oxide catalysts with high-activity manganese oxide, copper oxide and cerium oxide are supported inside mesopores and on the surfaces of the nano-composite material, mixed catalyst particles are dispersed in channels of the silicon dioxide carriers with the ordered mesopores, accordingly, excellent dispersing effects can be realized, the nano-composite material is high in catalytic activity, and a large quantity of gas can be adsorbed in sufficient spaces to carry out catalytic reaction.

Description

technical field [0001] The invention relates to the field of air purification application materials, in particular to a nanocomposite material for catalyzing formaldehyde decomposition at room temperature and a preparation method thereof. The nanomaterial can be applied to equipment such as air purifier filter elements. Background technique [0002] Formaldehyde (HCHO) is a common indoor air pollutant, which mainly comes from the adhesives in interior decoration materials and furniture materials. Especially in newly decorated rooms, a large number of indoor decoration materials will emit a large amount of formaldehyde, causing the content of formaldehyde in the indoor air to seriously exceed the national standard. Formaldehyde is a highly toxic substance, which can strongly stimulate the skin, eyes and respiratory tract of the human body, and also has an anesthetic effect on the central nervous system of the human body. Low concentrations of formaldehyde can damage the huma...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01D53/86B01D53/72
Inventor 黄建国肖鸽王伟
Owner NINGBO TAIAN NEW MATERIAL TECH CO LTD
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