title: Synthesis of a three-dimensional cubic mesoporous silica monolith employing an organic additive through an evaporation-induced self-assembly process.
abstract: We demonstrate a robust approach to the synthesis of a 3D cubic Im3m mesoporous silica monolith from SiO2/cetyltrimethylammoniumbromide (CTAB)/1,3,5-triisopropylbenzene (TIPB) sols having molar compositions of 1SiO2/0.0017HCl/5.2H2O/10EtOH/0.10CTAB/0.1-0.5TIPB by the evaporation-induced self-assembly (EISA) process. The addition of TIPB is aimed at altering the micelle geometry to spheroid from rodlike in the gel state; the change in micelle geometry leads to the formation of a 3D cage-type cubic mesostructure in the monolith. The synthesized materials exhibit BET surface areas of 800-1000 m(2)/g, a BJH pore diameter of 2.9-4.3 nm, and a pore volume of 0.7-1.0 cm(3)/g, demonstrating ultrahigh porosity of the 3D cubic mesostructure.
authors.affiliation: Department of Chemical System Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan.
authors.forename: Sajo P
authors.initials: SP
authors.lastname: Naik
authors.forename: Wei
authors.initials: W
authors.lastname: Fan
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Yokoi
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Okubo