Monolayer mesoporous nanosheets with surface asymmetry via a dual-emulsion-directed monomicelle assembly

Functional mesoporous materials,based on IUPAC,are a type of porous materials with a uniform pore size ranging from 2 to 50 nm.In the 1980s,the existing zeolites or microporous materials with small pore sizes(less than 1.2 nm)have some limitations in practical applications,especially for large molecule conversion and transfer.Inspired by these motivations,the exploration of mesoporous materials has been widely sparked.From the early 1990s,the mesoporous materials including or-dered M41S[1]mesoporous silicate molecular sieves and large-pore mesoporous silica SBA-15[2]were prepared when templated by the quaternary ammonium cationic surfactant or the amphiphilic triblock copolymer micelles.The high thermal stability of such porous materials and good repeatability of methods have aroused widespread interest in both academic and industrial domains.