Characterization of nanosized Tb–MCM-41 synthesized by the sol–gel-assisted self-assembly method

Abstract

The nanosized luminescent Tb–MCM-41 (1:10) is synthesized by means of sol–gel-assisted self-assembly under basic conditions at room temperature. The results of 29Si-MAS NMR and XRD prove that Tb 3+ doped Si–O framework. The HRTEM image shows that the regular uniform particles with a diameter of 10 nm possess ultralarge pore with ∅2.0 nm, which is consistent with the result of N 2 adsorption. The BET surface area and porosity of Tb–MCM-41 (1:10) are 1127 m 2/g and 0.84 cm 3/g, respectively. The patterns of selected-area electron diffraction and XRD of Tb–MCM-41 (1:10) show an Fm3 m space group in the cubic. FT-IR results show that the peaks near 970 cm −1 are assigned to the deformation vibration of silanol group. The as-products are calcined at 800 °C and the mesoporous materials possess enormous specific areas and large porosity, it shows that the mesoporous materials are ultrastable.