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Preparation method of formaldehyde-photodegrading honeycomb activated carbon

A technology of honeycomb activated carbon and photodegradation, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles, etc. It can solve the problems of inhibiting commercial production, low adsorption capacity, increasing catalyst cost and environmental load, and achieves good catalytic degradation. High performance, good adsorption performance, and low production cost

Inactive Publication Date: 2015-02-25
NORTHEAST FORESTRY UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional methods often have low adsorption capacity, are easily saturated, and need to be replaced frequently. At the same time, the addition of noble metals increases the cost of catalyst preparation and environmental load, which inhibits large-scale commercial production.

Method used

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  • Preparation method of formaldehyde-photodegrading honeycomb activated carbon
  • Preparation method of formaldehyde-photodegrading honeycomb activated carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 10.0g black material (polyether 4110 of 5 parts, the hard foam silicon oil of 0.2 part, the water of 0.08 part, the pentamethyldiethylene triamine of 0.006 part, the dichlorofluoroethane of 4 parts in the cellophane mold, 0.2 parts of the mixture of cycloethylamine), 2.0g powdered activated carbon, after stirring for 60s at a rotating speed of 150r / min, add 7.0g white material, increase the rotating speed to 600r / min until it foams freely, and make it mature at room temperature for 12h Shaped, placed in a muffle furnace for heat treatment at 350 ° C for 1 hour to obtain honeycomb activated carbon.

[0025] P-25 TiO 2 Nanoparticles are ultrasonically dispersed to make a suspension with a concentration of 1%. The above-mentioned honeycomb-shaped activated carbon is soaked in the suspension for a period of time, and heat-treated in an oven until completely dry to obtain a P-25 / activated carbon composite material.

[0026] Hang the prepared P-25 / activated carbon compos...

Embodiment 2

[0028]Add 10.0g black material (6 parts of polyether 4110, 0.1 part of hard foam silicone oil, 0.08 part of water, 0.008 part of pentamethyldiethylenetriamine, 4 parts of dichloromonochloroethane, 0.2 parts of the mixture of cycloethylamine), 4.0g powdered activated carbon, after stirring for 50s at a rotating speed of 200r / min, add 9.0g white material, increase the rotating speed to 500r / min until it foams freely, and make it mature after 20h at room temperature. Shaped, placed in a muffle furnace for heat treatment at 450 ° C for 1 hour to obtain honeycomb activated carbon.

[0029] P-25 TiO 2 Nanoparticles are ultrasonically dispersed to make a suspension with a concentration of 1.5%. The above-mentioned honeycomb-shaped activated carbon is soaked in the suspension for a period of time, and heat-treated in an oven until completely dry to obtain a P-25 / activated carbon composite material.

[0030] Hang the prepared P-25 / activated carbon composite material in the laboratory-...

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Abstract

Disclosed is a preparation method of formaldehyde-photodegrading honeycomb activated carbon. The method is characterized by including: putting powdered activated carbon in a home-made cellophane mould, adding a black material prior to mixing for a certain period of time, rapidly adding a white material, performing high-speed mixing prior to free foaming, carrying out room-temperature curing prior to forming, putting the formed material in a muffle furnace for high-temperature heat treatment prior to obtaining the honeycomb activated carbon, subjecting TiO2 nano particles of P-25 type to ultrasonic dispersion to form suspension liquid, completely immersing the prepared honeycomb activated carbon into the suspension liquid, and performing heat treatment to prepare a P-25 / activated carbon composite having good photocatalytic degradation performance on indoor formaldehyde. The operation process has the main advantages that that the operation method is simple, the prepared honeycomb activated carbon is large in specific surface area and high in adsorptive property, can be prepared into arbitrary shape, has good catalytic degradation performance on indoor formaldehyde gas and is reusable, low in production cost and applicable to removal of formaldehyde gas after home decoration, and after the honeycomb activated carbon is loaded with P-25, the P-25 nano particles are evenly dispersed in the surface and pores of the honeycomb activated carbon.

Description

Technical field: [0001] The invention relates to the field of preparation of inorganic nanometer materials, in particular to a preparation method of photodegradation formaldehyde honeycomb activated carbon. Background technique: [0002] Indoor air pollution has gradually become one of the most important "invisible killers" that endanger human health. There are more than 500 kinds of volatile organic compounds in indoor air, among which formaldehyde and benzene series are the main toxic gases. In 2004, the International Center for Cancer Research ( IARC) identified formaldehyde as a carcinogen in the No. 153 "Formaldehyde Carcinogenic" Bulletin, which mainly comes from decoration materials, furniture, coatings, wood-based panels and adhesives involved in decoration. The national standard of the People's Republic of China "Hygienic Standards for Formaldehyde in Indoor Air" stipulates that the maximum allowable concentration of formaldehyde in indoor air is 0.08mg / m 3 , Usual...

Claims

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Application Information

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IPC IPC(8): B01J21/18B01J35/04B01J35/10B01D53/86B01D53/72
Inventor 刘守新李伟吴琼黄宝萱张弘庆孟振东冯稀
Owner NORTHEAST FORESTRY UNIVERSITY
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