Method for preparing perovskite-type catalytic material

Abstract

The invention relates to a method for preparing a perovskite-type catalytic material. The method includes the following steps: 1, respectively weighing a perovskite metal oxide and a metal nitrate precursor; 2, putting the perovskite metal oxide and the metal nitrate precursor of step 1 and deionized water into a reaction kettle at the same time, wherein the adding amount of the metal nitrate precursor accounts for 1-5% of the weight of the perovskite metal oxide, and 2-10 ml of the deionized water is added for each gram of the perovskite metal oxide; 3, putting the reaction kettle in an ovenat 200-250 DEG C for 3-5 hours of reaction after sealing; 4, after reaction, performing natural cooling, and alternately washing the reactant by ethanol and the deionized water for filtration; 5, drying the reactant at the temperature of 80 DEG C, and calcinating the reactant at the temperature of 600 DEG C for 1-3 hours. The method has the advantages that the perovskite metal oxide catalyst is optimally treated through addition of metal ions; the defects of perovskite metal oxide catalysts prepared by conventional methods are overcome; the specific surface area is increased, and accordingly,methane is efficiently catalyzed and degraded.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, in particular, it relates to a preparation method of a perovskite type catalytic material. Background technique [0002] At present, the world's energy is still based on fossil energy such as coal and oil. With the improvement of people's awareness of environmental protection, clean energy natural gas with methane as the main component has obvious advantages in the process of energy development and use, but its use has brought development and progress to the world, but it has also brought environmental pollution and other problems. Among hydrocarbons, methane is the most difficult to oxidize, and this low reactivity is related to the symmetry of its molecule. Traditional methane combustion needs to be carried out at a high temperature above 1500°C, so it produces NOx, CO and other gas pollutants that seriously pollute the environment; and methane itself is a greenhouse gas, and its g...

AI Technical Summary

Problems solved by technology

However, the preparation methods of porous perovskites, such as the template method, are complex and costly, and other methods also require high temperature and long-term calcination, resulting in lower surface area and surface catalytic reaction efficiency.

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