Preparation method of loaded type silver catalyst for formaldehyde purification

The invention relates to a preparation method of a loaded type silver catalyst for formaldehyde purification. A carbon nanometer tube is subjected to acidification treatment; carbon nanometer tube suspension is prepared; silver precursor salt solution is prepared; a carbon nanometer tube loaded silver catalyst Ag/CNT material is prepared; reaction is performed for 0.5 to 6h under the temperature condition of 60 to 100 DEG C; drying is performed for 12 to 24h under the temperature of 80 to 100 DEG C; calcination is performed for 2 to 3h at 300 to 500 DEG C to obtain an Ag/CNT nanometer catalystmaterial. The method overcomes the defects that the dispersion of the silver nanometer particles on the surface of the carbon nanometer tube is nonuniform, and the silver nanometer particles realizing the single dispersion and uniform particle diameter distribution are difficult to form. The preparation method provided by the invention is mild; the operation is simple; the cost is low; the repeatability is high; higher f