Monolithic VOCs catalytic combustion catalyst and preparation method thereof

The invention discloses a preparation method of an integral VOCs catalytic combustion catalyst, which comprises the following steps: fully dissolving Co3O4 serving as an active component, silicon dioxide serving as a carrier, alumina sol serving as a binder and P123 and F127 serving as structure-directing agents in distilled water to prepare a mixed solution precursor meeting 3D printing conditions, and then printing a designed three-dimensional model by using 3D printing equipment; aging and calcining the three-dimensional model, dipping the three-dimensional model in a cobalt salt and 2-methylimidazole mixed solution, and finally performing high-temperature activation to obtain the VOCs catalytic combustion monolithic catalyst. The monolithic catalyst prepared by the method is regular in appearance, keeps a macroscopic porous layered structure and a microcosmic ordered mesoporous structure, is high in pore density, uniform in pore channels and large in specific surface area, the contact area between the cat