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

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...