Abstract

The hydrophilicity/hydrophobicity of zeolites has been received increasing attentions due to its great influence on the physical, chemical property and application of zeolites. Generally, zeolites with different hydrophilicity/hydrophobicity exhibit different interaction with molecules/contaminations of different polarity, and thus have found promising applications in various and different fields. In this review, we first discuss the two main influence factors, i.e. SiO₂/Al₂O₃ ratio and surface hydroxyl groups affecting hydrophilicity/hydrophobicity of aluminosilicate zeolites. Then, we give an overview of the ways for regulation of hydrophilicity/hydrophobicity of zeolites, i.e. hydrothermal synthesis, post synthesis for SiO₂/Al₂O₃ ratio regulation and heat treatment, surface modification, water intrusion-extrusion method for hydroxyl groups regulation. The third, the hydrophilicity/hydrophobicity determination methods, i.e. water vapor adsorption, hydrocarbon/water vapor adsorption and TG experiment methods are concluded and compared. Finally, the problems and challenges for the future of this subject are discussed.

摘要

沸石的亲水性/疏水性对沸石的物理、化学性质和应用有着很大的影响，因此受到越来越多的关注。通常，具有不同亲水性/疏水性的沸石与不同极性的分子/污染物表现出不同的相互作用，因此在各种不同的领域都有很好的应用前景。在这篇综述中，我们首先讨论了影响硅铝酸盐沸石亲水性/疏水性的两个主要影响因素，即SiO ₂ /Al ₂ O ₃比和表面羟基。然后，我们概述了调节沸石亲水性/疏水性的方法，即水热合成，SiO ₂ /Al 的后合成₂ O ₃比例调节和热处理、表面改性、羟基调节的水挤挤法。第三，总结和比较了亲水性/疏水性测定方法，即水蒸气吸附法、烃/水蒸气吸附法和TG实验方法。最后，讨论了该学科未来面临的问题和挑战。