Spontaneous preparation of hierarchically porous silica monoliths with uniform spherical mesopores confined in a well-defined macroporous framework
Guo, X; Wang, R; Yu, H; Zhu, Y; Nakanishi, K; Kanamori, K; Yang, H
| HERO ID | 3044687 |
|---|---|
| In Press | No |
| Year | 2015 |
| Title | Spontaneous preparation of hierarchically porous silica monoliths with uniform spherical mesopores confined in a well-defined macroporous framework |
| Authors | Guo, X; Wang, R; Yu, H; Zhu, Y; Nakanishi, K; Kanamori, K; Yang, H |
| Journal | Dalton Transactions (Online) |
| Volume | 44 |
| Issue | 30 |
| Page Numbers | 13592-13601 |
| Abstract | Hierarchically porous silica monoliths with well-defined interconnected macropores and uniform spherical mesopores were spontaneously prepared by combining polymerization-induced phase separation with an epoxide-mediated sol-gel route without any complicated aging and drying and high-temperature heat treatment. The precise control of pore structures can be realized by using propylene oxide (PO) as the gelation mediation agent, poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (P123) as the phase-separation inducer as well as the structure-directing agent and 1,3,5-trimethylbenzene (TMB) as the micelle-swelling agent. The as-prepared silica monolith possesses an interesting hierarchically porous structure constructed by 10 nm uniform spherical mesopores confined in a macroporous framework of well-defined 1 μm macropores, and exhibits a BET surface area as high as 848 m(2) g(-1). Heat treatment at 400-800 °C gradually decreases the BET surface area to 195 m(2) g(-1), while most of the uniform mesoporous structure remains intact. |
| Doi | 10.1039/c5dt01672j |
| Pmid | 26140683 |
| Wosid | WOS:000358208400025 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |