Benzene detecting element and preparation process of same

A benzene detecting element comprising a mesoporous silicate for selectively and highly sensitively detecting benzene, said detecting element comprising:

• a first nanosized fine pore having a highly ordered periodical fine pore structure, wherein the first nanosized fine pore has a sub-nanosized fine pore in its wall surface, the sub-nanosized fine pore is a conduit connecting the first nanosized fine pore with a second nanosized fine pore so that the first and second nanosized fine pores communicate with each other, the first nanosized fine pore has a pore size of from 0.15 nm to 50 nm in radius, the sub-nanosized fine pore has a pore size of from 0.05 nm to 0.5 nm in radius, at least the sub-nanosized fine pore of the fine pores comprises an organosilicon functional group containing a phenyl group, or a silanol group, and the organosilicon functional group or the silanol group interacts intermolecularly with a target benzene molecule.