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| he luminescent nanosized Eu-MCM (1:10) is synthesized by means of sol-gel-assisted self-assembly under basic conditions at room temperature. That result of 29Si-MAS NMR show that the peaks are Q4, Q3, Q2 [ (SiO)4-mSi–(OH)m ( m = 0, 1, 2 ), at –111, –103, –90 ppm ], and q3, q2, q1, q0 [ (SiO)4-nSi–(O–Eu)n ( n=1, 2, 3, 4 ), at –83, –72, –55, –47 ppm ]. The result proves that Eu3+ doped Si-O framework. The HRTEM image shows that the regular uniform nanoparticles with a diameter of 15 nm possess ultralarge pore with Æ8nm, which is consistent with the result of N2 Adsorption. The patterns of selected-area electron diffraction, XRD, and pore-size distribution plot of Eu-MCM (1:10) show The results show that the sample of Eu-MCM (1:10) possesses the both of crystal and amorphous phases. The FTIR results indicate that the peaks near 970cm-1 are assigned to the deformation vibration of silanol group. The as-product is calcined at 800 oC and the mesoporous material possess enormous specif |
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| Keywords:Eu-MCM, Luminescence, HRTEM, FTIR, 29Si-MAS NMR |
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