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 m2 g-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.
|Number of pages||7|
|Journal||Journal of Materials Science|
|Publication status||Published - 2004 Apr 1|
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering