| abstract |
The present invention provides a technique for constructing a porous silica having a bimodal pore structure having two types of different mesopores simultaneously. An anion (for example, BF 4 − , PF 6 − , F − ) that serves as a reaction promoting substance other than a sol-gel reaction catalyst when a mesoporous silica is prepared by a sol-gel reaction using an aggregate structure of a surfactant as a template. Present in the reaction system. Two types of mesopores are obtained, in particular, mesoporous silica having a honeycomb-like pore arranged in a honeycomb shape and having a pore diameter of 2 to 4 nm and a pore diameter of 4 nm or more. [Selection] Figure 7 |