Process for preparing nanometer gold catalyst

Abstract

The invention relates to preparation of a nanometer gold catalysts with higher activity and stability, using ultrasonic wave or a synergism of vacuumizing and ultrasonic wave for diffusing nanometer particle into meso pore of porous carrier, which restrains nanometer particle from growing when use and store the nanometer particle. At or under room temperature, the nanometer gold catalysts have good activity for purifying CO and long service life, and the nanometer gold catalysts prepared by the method have prospect of industrialized production and the strength can satisfy practical requirement.

Description

A kind of preparation method of nano gold catalyst technical field The invention is a preparation method of a nano-gold catalyst. The application range of the catalyst includes coal mine self-rescuers for preventing CO, escape masks for high-rise buildings, or other devices for protecting CO, CO2 lasers, CO sensors and some special or airtight Purification of CO in the environment. Background technique The CO purification catalyst that has been used for a long time in the past is Hopcalite (Hopcalite agent). It was jointly invented by Johns Hopkins University and the University of California in 1919. It is a catalyst made of active manganese dioxide and copper oxide in a certain proportion. Usually the preparation method of Hopcalite catalyst is sulfuric acid method. The first step is to make active manganese dioxide, which is to mix manganese sulfate fine powder (below 70 mesh) with a small amount of water, and add concentrated sulfuric acid under constant stirring to m...

AI Technical Summary

Problems solved by technology

The disadvantage is that the pretreatment is more complicated, and at room temperature, it cannot play an effective role

However, if gold is supported on a single carrier Al2O3, generally no nano-gold catalyst with low-temperature activity can be obtained. If gold is supported on a single transition metal oxide, the catalyst obtained generally has considerable performance in the process of realizing industrialization. Difficulties