Method for preparing integrated catalyst for low-temperature catalytic oxidation of formaldehyde

The invention relates to a method for preparing an integrated catalyst for low-temperature catalytic oxidation of formaldehyde. The method comprises the steps of conducting hydration on an aluminum sheet subjected to anodic oxidation in deionized water which is 30-95 DEG C for 5-70 min, so that a Boehm system is obtained; placing the Boehm system in a chloroplatinic acid solution with the concentration of 0.1-0.8 g/L for dipping lasting 1-8 h at 25 DEG C, and conducting drying for 12 h at normal temperature; conducting reduction for 0.5-3 h at 25 DEG C in a sodium borohydride solution with the concentration of 0.05-1 mol/L, and conducting drying for 12 h at normal temperature, so that the integrated catalyst is obtained. The catalyst prepared with the method can well adsorb methanol when applied to a methanol catalytic combustion system, and can oxidize part of methanol at normal temperature, methanol conversion rate reaches 72% at normal temperature when platinum content is 2-2.5 wt%, and complete conversion can be achieved at 60 DEG C.