Zr-MCM-41的合成及其表征

Zr-MCM-41 mesoporous materials were prepared via a direct-synthesis method using Zr(NO3)4·3H2O as a precursor. The samples were characterized with XRD (X-ray Diffraction), TG-DTA (Thermogravimetry-Differential Thermal Analysis) and N2 adsorption. The effects of Zr/Simolar ratio on the Zr-MCM-41 were then investigated. The results show that the peak of 100 near 2θ=2° in XRD patterns becomes weaker with the increase of Zr/Si molar ratio. To obtain the mesoporous Zr-MCM-41, the maximum of Zr/Si molar ratio is 0.25. The BET area of the Zr-MCM-41samples decreases with the increase of Zr/Si ratio, but the pore size keeps as 2.75nm～2.97nm.