多级孔分子筛的制备与表征：碱浓度和处理时间的影响
DOI:
https://doi.org/10.70693/cjst.v1i4.1598Keywords:
分子筛；多级孔；碱浓度；处理时间Abstract
ZSM-5分子筛因其具有高比表面积、高稳定性以及丰富的孔道结构而受到广泛关注和应用。然而，商业的ZSM-5分子筛以微孔结构为主，限制了其在一些领域的应用。本文采用简单的碱处理方法，通过改变NaOH的浓度和NaOH处理的时间，成功合成了多级孔ZSM-5分子筛。通过X射线衍射、傅里叶红外光谱、氮气吸附脱附和扫描电子显微镜等表征，考察了处理前后ZSM-5分子筛的物理和化学性质变化。结果表明，碱处理不会改变分子筛的MFI拓扑结构，且碱浓度越大、处理时间越长，ZSM-5分子筛中产生的介孔越多、孔径和孔容越大，主要原因为碱刻蚀了分子筛的表面或骨架。
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