Abstract
After heated at 400 degrees C, the activated silica gel reacted with silicon tetrachloride to obtain chlorinated silica gel in anhydrous tetrahydrofuran. And a modified silica gel with carbonyl and amino groups on its surface was obtained by the reaction between chlorinated silica gel and acetamide. The modification has good coordination ability to Fe3+, and a supported catalyst with catalytic active site of Fe3+ evenly distributed was then prepared by coordination between Fe3+ and the surface organic modified silica gel. The synthesized catalyst has good catalytic oxidation performance to formaldehyde, and a maximum conversion of formaldehyde is about 91.3%.