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Supported nano gold catalyst for clearing formaldehyde from indoor air and method for preparing the same

A technology for removing formaldehyde and indoor air, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effects of low cost, high feasibility and simple production method

Inactive Publication Date: 2005-11-23
INNER MONGOLIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And still there is not yet a kind of good method that can effectively remove the formaldehyde contained in the indoor air under energy-saving conditions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: The supported nano-gold catalyst used to remove formaldehyde in indoor air is a cylindrical cordierite porous ceramic as a carrier, wherein the diameter is 70mm and the height is 120mm, and a layer of cerium oxide CeO is uniformly coated on the surface of the carrier 2 coating, in which cerium oxide CeO 2 The weight accounts for 5% of the weight of the carrier, and then deposits a thin coating of 3-10nm gold grains in cerium oxide, wherein the weight of gold accounts for 1% of the weight of the cerium oxide coating.

[0018] The above-mentioned production method of the loaded nano-gold catalyst used for removing formaldehyde in indoor air takes a cylindrical cordierite porous ceramic as a carrier, wherein the diameter is 70mm, and the height is 120mm, wherein the cross-section of the cordierite porous ceramic as the carrier is A cordierite porous ceramic material with 49 small through-holes distributed in centimeters is immersed in a soluble cerium nitrate so...

Embodiment 2

[0031] Embodiment 2: The loaded nano-gold catalyst used for removing formaldehyde in indoor air is a carrier of cylindrical cordierite porous ceramics, wherein the diameter is 85mm and the height is 150mm, and a layer of La evenly coated on the surface of the carrier 0.8 Ce 0.2 MnO 3 coating, where La 0.8 Ce 0.2 MnO 3 The weight accounts for 8% of the weight of the carrier, and then in La 0.8 Ce 0.2 MnO 3 A thin coating of 3-10nm gold grains is deposited in a medium, wherein the weight of gold accounts for 1.5% of the weight of the cerium oxide coating.

[0032] The above-mentioned production method of the loaded nano-gold catalyst used for removing formaldehyde in indoor air takes cylindrical cordierite porous ceramics as a carrier, wherein the diameter is 85mm, and the height is 150mm, wherein the cross-section of the cordierite porous ceramics as the carrier is A cordierite porous ceramic material with 49 small through-holes distributed in centimeters is immersed in ...

Embodiment 3

[0033] Embodiment 3: The loaded nano-gold catalyst used for removing formaldehyde in indoor air is a carrier of cube cordierite porous ceramics, wherein 12 cube cordierite porous ceramics with a side length of 50 mm are placed into rectangular cuboids with a cross-sectional area. The cuboid has a side length of 100mm and a length of 150mm, and a layer of LaMnO is evenly coated on the surface of the carrier. 3 coating, where LaMnO 3 The weight accounts for 10% of the weight of the carrier, and then in LaMnO 3 A thin coating of 3-10nm gold grains is deposited in the medium, wherein the weight of gold accounts for 2.5% of the weight of the cerium oxide coating.

[0034] The above-mentioned production method of the loaded nano-gold catalyst used for removing formaldehyde in indoor air takes a cube cordierite porous ceramic as a carrier, wherein 12 cube cordierite porous ceramics with a side length of 50mm are placed into a rectangular cuboid with a cross-sectional area, The side...

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Abstract

This invention relates to a supported nanometer gold catalyst which is used for cleaning formaldehyde of room air, in addition to its preparing method. The method comprises the following steps: a) using cordierite honeycomb ceramics as the carrier; b) coating a layer of rare earth oxide or composite rare earth oxide in the carrier surface evenly; c) depositing 3-10nm golden grain in the rare earth oxide or composite rare earth oxide, wherein the weight of gold is 1%-3% of the coating. Said catalyst can clean the formaldehyde of the air and the formaldehyde has a high conversion ratio. Meanwhile, the catalytic activity of said catalyst is larger by a magnitude order compared with Mn, Co oxide or rare earth composite oxide catalyst.

Description

Technical field: [0001] The invention relates to a catalyst and a production method thereof, in particular to a supported nano-gold catalyst used for removing formaldehyde in indoor air and a preparation method thereof. Background technique: [0002] With the improvement of people's living standards, housing decoration is a common thing. Indoor air is polluted to varying degrees due to the adhesives and coatings commonly used in decoration materials and furniture. Some decoration materials emit benzene and formaldehyde. Benzene has a low boiling point and good volatility. After opening the window and opening the door, it can basically be desalinated and reach the standard after a period of time. Formaldehyde is the most commonly used substance in general binders and coatings. It has poor volatility and belongs to "slow release". Therefore, several years after the house is renovated, the formaldehyde in the indoor air still lingers. People living in an environment with ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/72
Inventor 沈岳年
Owner INNER MONGOLIA UNIVERSITY
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