Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
76919 | Microporous and Mesoporous Materials | 2006 | 5 Pages |
Abstract
Inverse opal having mesoporous silica walls has been synthesized using close-packed polystyrene beads and octadecyltrimethylammonium chloride as a templates, and tetramethoxysilane as a silica precursor. The synthesized bimodal porous silica was characterized by XRD, N2 sorption, SEM and TEM. Hollow silica with inverted opaline structure had a macroporous diameter of 390 nm and a wall thickness of approximately 30 nm, and the mesoporous silica walls had a specific surface area of 367 m2/g, a mesopore diameter of 2.9 nm and a wall thickness of 1.8 nm. The refractive index (n) of this material was found be 1.05, which is lower than that of silica (n = 1.44) and also close to that of the air.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
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Authors
Satoru Fujita, Hideyuki Nakano, Masahiko Ishii, Hiroshi Nakamura, Shinji Inagaki,