title: Preparation of a hierarchically porous AlPO4monolith via an epoxide-mediated sol-gel process accompanied by phase separation.
abstract: Monolithic aluminum phosphate (AlPO4) with a macro-mesoporous structure has been successfully prepared via the sol-gel process accompanied by phase separation in the presence of poly(ethylene oxide) (PEO). Gelation of the system has been mediated by propylene oxide (PO), while PEO induces a phase separation. The dried gel is amorphous, whereas the crystalline tridymite phase precipitates upon heating above 1000 °C. Heat treatment does not spoil the macroporous morphology of the AlPO4monoliths. Nitrogen adsorption-desorption measurements revealed that the skeletons of the dried gels possess a mesostructure with a median pore size of about 30 nm and a surface area as high as 120 m2g-1. Hydrothermal treatment before heat treatment can increase the surface area to 282 m2g-1.
authors.affiliation: Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, People's Republic of China; Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan.
authors.forename: Wenyan
authors.initials: W
authors.lastname: Li
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan.
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, People's Republic of China.
authors.forename: Xingzhong
authors.initials: X
authors.lastname: Guo
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan.
authors.forename: Kazuki
authors.initials: K
authors.lastname: Nakanishi
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan.
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Kanamori
authors.affiliation: Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, People's Republic of China.
authors.forename: Hui
authors.initials: H
authors.lastname: Yang
keywords: 10.02; 20.03; 30.01; aluminum phosphate; monolith; phase separation; porous; sol–gel