A new mesosilica-encapsulated Keggin type heteropolyacid-HPW/SiO_2 was synthesized by adding HPW into a sol-gel system to form mesoporous silica involving hydrolysis of tetraethyl orthosilicate under the strong acidic synthesis conditions(pH<0). The mesosilica-impregnated -{heteropolyacid-} thus synthesized are insoluble and readily separable mesoporous composite materials with uniform mesopores and high specific surface areas. Their structures and physical-chemical properties was characterized by various m...
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