Automobile exhaust treatment catalytic material and preparation method thereof

Abstract

The invention discloses an automobile exhaust treatment catalytic material which is prepared by the following method: adding zinc nitrate and tetrabutyl titanate into a DMF/ethanol mixed solvent, then adding PVP and ammonium bicarbonate, stirring and mixing uniformly, performing electrostatic spinning by taking the mixture as a spinning solution to form PVP-ZnTiO3, and then performing heat treatment in air at 350-450 DEG C to obtain hollow porous ZnTiO3 nanofiber; dissolving sodium molybdate and cobalt nitrate in a mixed solution of ethanol and glycerol, then adding trisodium citrate, placing the hollow porous ZnTiO3 nanofibers in the mixed solution, carrying out solvothermal reaction at 180-200 DEG C, and then carrying out heat treatment at 300-400 DEG C to obtain the hollow porous ZnTiO3-CoMoO4.

Description

technical field [0001] The application relates to the technical field of environmental protection, in particular to a composite material that can be used for highly efficient catalysis of nitrogen oxides in automobile exhaust and a preparation method thereof. Background technique [0002] With the rapid development of society and the increasing number of motor vehicles around the world, the pollutants from vehicle exhaust have become one of the main sources of urban air pollution, which not only seriously threatens human health, but also causes great damage to the environment. Therefore, all countries are formulating more and more stringent automobile exhaust emission regulations to limit the emission of pollutants in automobile exhaust. At present, one of the effective methods for treating nitrogen oxides in automobile exhaust is catalytic reduction technology (SCR), and the core part of the SCR system is the catalyst, whose performance directly determines the removal effic...