Preparation of three-dimensionally ordered macroporous MnCo2O4 spinel-type composite oxide

Abstract

The invention relates to preparation of a three-dimensionally ordered macroporous MnCo2O4 spinel-type composite oxide. The preparation comprises the following manufacturing steps: a first step, weighing manganese acetate tetrahydrate and cobalt nitrate hexahydrate; a second step, adding methanol or mixed liquor of ethylene glycol and water to dissolve at room temperature; a third step, weighing glucose according to a ratio, adding into the solution of the second step and continuing to stir; a fourth step, adding a polymethyl methacrylate template and impregnating; a fifth step, pouring the impregnated mixed liquor into a buchner funnel for suction filtration, washing, and drying; a sixth step, placing a dried sample in a tube furnace, raising temperature from room temperature for multipletimes, and then dropping to room temperature. The preparation of the three-dimensionally ordered macroporous MnCo2O4 spinel-type composite oxide has the beneficial effects that a prepared catalyst hasa regular pore structure, a larger pore size, a higher specific surface area, the preparation of the three-dimensionally ordered macroporous MnCo2O4 spinel-type composite oxide can increase a comparative area of the catalyst, and improve contact performance between the catalyst and soot particles, in addition, by adding glucose, combustion temperature of the soot particles can be reduced, and activity of the catalyst can be increased.

Description

technical field [0001] The invention relates to a preparation method of a diesel vehicle exhaust gas purification treatment catalyst, in particular to a three-dimensional ordered macroporous MnCo 2 o 4 Preparation of spinel-type composite oxides. Background technique [0002] With the continuous improvement of living standards, the number of automobiles is also increasing rapidly, and the problem of automobile exhaust pollution is increasing day by day. Diesel vehicles have become the "darling" of many enthusiasts today because of their good fuel economy, high ignition point, not easy to be ignited or exploded due to accidental circumstances, and safer and more stable to use. However, the soot particulate matter (PM) contained in the exhaust of diesel vehicles is as high as 50 times that of gasoline engines. It is one of the main sources of smog and is extremely harmful to human health. In response to the problem of diesel vehicle exhaust pollution, countries around the w...

AI Technical Summary

Problems solved by technology

Although the conventional soot combustion catalyst powder can improve the contact performance between the catalyst and the carbon particles, its particle size is less than 10nm, and the particle size of the soot particles is greater than 25nm, so it is difficult to enter the catalyst pores and react, and can only interact with the outer surface of the catalyst. Surface contact, resulting in a decrease in the activity of the catalyst

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