Preparation method for spherical materials for removing formaldehyde gas molecules by dual-catalysis color development

The invention provides a preparation method for spherical materials for removing formaldehyde gas molecules by dual-catalysis color development. The preparation method is characterized by comprising the following steps: pouring an ethyl alcohol solution of phloroglucinol and silica sol of ammonium hydroxide contained silicon dioxide mesoporous materials at a ratio into a sodium hydroxide solution;fully mixing and stirring to form viscous paste; then, pouring the viscous paste into a spherical mould, and curing and forming for a period of time to obtain a sphere, wherein ammonium hydroxide isa No.1 catalyst, and sodium hydroxide is a No.2 catalyst. The preparation method is provided with the spherical materials which can clear indoor formaldehyde and has a pink color indication function,formaldehyde molecules can be effectively removed, a critical defect that the physical adsorption material becomes a second releasing source after formaldehyde is adsorbed by the physical adsorption material is overcome, harm o