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- Title
One-step synthesis of mesoporous PWA/SiO<sub>2</sub> composite materials using triblock copolymer templates.
- Authors
Hui Suk Yun; Kuwabara, Makoto; Hao Shen Zhou; Honma, Itaru
- Abstract
Materials in the form of highly dispersed 12-phosphotungstic acid (PWA) in mesoporous SiO2 framework (PWA/meso-SiO2) have been synthesized by one-step condensation method. The samples were characterized by XRD, TEM, EDX, FE-SEM, FT-IR, 31P MAS NMR and N2 adsorption. The mesostructure of the materials obtained can be maintained up to the PWA loading amount of 30 wt%. The specific surface area and the pore size of the PWA/meso-SiO2 are 600 m²g-1 and 8.9 nm, respectively, for 30 wt% PWA loading. PWA clusters preserved their Keggin ion structure and exist in the SiO2 framework with partial interactions between PWA and SiO2.
- Subjects
TUNGSTIC acid; CONDENSATION; X-ray diffraction; TRANSMISSION electron microscopy; COPOLYMERS; COMPOSITE materials
- Publication
Journal of Materials Science, 2004, Vol 39, Issue 7, p2341
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1023/B:JMSC.0000019995.35925.42