气氛对Al-MCM-41热稳定性的影响

Effects of Atmosphere on Thermal Stability of Al-MCM-41

研究了在不同气氛(氧气、氮气和氨气)条件下Al-MCM-41的热稳定性能,通过比表面积、孔径分布及X射线衍射对Al-MCM-41热稳定性的研究表明:在不同气氛条件下,Al-MCM-41的热稳定性有很大的差异,在氨气或氮气气氛下,处理温度高达1010℃条件下,Al-MCM-41仍然具有良好的介孔结构,但在氧气中介孔结构热稳定温度不超过900℃。

The effects of atmosphere (O2, N2 and NH3) on the thermal stability of Al-MCM-41 were investigated for the first time. The thermal stability, characterized by BET surface area, pore diameter distribution and XRD patterns, showed greatly difference in samples treated under different atmosphere conditions. The samples treated in NH3 or N2 remained typical mesoporous structure up to 1010℃, but the mesoporous structure in the samples treated in O2 collapsed at temperatures larger than 900℃.