摘要
A functionalized material, PW/SBA-15m, was prepared successfully in diluted H_2SO_4 aqueous solutions by immobilizing 12-tungstophosphates on chemically modified mesoporous silica SBA-15 and characterized by elemental analysis, FTIR, ~ ~31 P MAS NMR, XRD and TEM. The results indicate that the framework of SBA-15 and the Keggin structure of PW_~12 O^3- _~40 were retained, and that 23%-33%(mass fraction) of ~PW_~12 O^3- _~40 was immobilized; the PW_~12 O^3- _~40 anions were finely dispersed on the pore wall of SBA-15. Having been leached in ethanol at 60 ℃ for 7 h, the loss of PW_~12 O^3- _~40 anions was not found.
A functionalized material, PW/SBA-15m, was prepared successfully in diluted H_2SO_4 aqueous solutions by immobilizing 12-tungstophosphates on chemically modified mesoporous silica SBA-15 and characterized by elemental analysis, FTIR, ~ ~31 P MAS NMR, XRD and TEM. The results indicate that the framework of SBA-15 and the Keggin structure of PW_~12 O^3- _~40 were retained, and that 23%-33%(mass fraction) of ~PW_~12 O^3- _~40 was immobilized; the PW_~12 O^3- _~40 anions were finely dispersed on the pore wall of SBA-15. Having been leached in ethanol at 60 ℃ for 7 h, the loss of PW_~12 O^3- _~40 anions was not found.
基金
SupportedbytheDalianMunicipalScienceandTechnologyCommissionandLiaoningProvincialScienceandTechnolo-gyCommission(No.200310592003).
