Preparation and Characterization of 3DOM H3PMo12O40–SiO2 with Keggin Structure

H3PMo12O40 with Keggin structure was supported on three-dimensionally ordered macroporous (3DOM) SiO2 to synthesize a new-type 3DOM composite material of H3PMo12O40–SiO2. Through comparative analysis of H3PMo12O40 and 3DOM H3PMo12O40–SiO2, it could be found that the thermal stability of H3PMo12O40 was increased after supporting and that Keggin structure was remained also in 3DOM H3PMo12O40–SiO2, but the crystalline form was changed. Moreover, H3PMo12O40 combined with SiO2 tightly and the synthesized H3PMo12O40–SiO2 had unique porous structure like crown and interconnected through small windows.