沸石分子筛膜缺陷的形成及修复

分子筛膜在化学传感器、膜分离和膜催化等领域有潜在的应用前景。缺陷的存在降低了分子筛膜的筛分作用和分离选择性，从而限制了其工业应用。本文综述了沸石分子筛膜缺陷形成及修复方面的研究进展，详细介绍了沸石分子筛膜缺陷形成的原因，并按照过程机理将分子筛膜修复方法划分为多次合成法、积炭结焦法、表面涂层法、化学气相沉积法以及液相化学沉积法等。在深入分析了各种修复方法优缺点的基础上，对今后分子筛膜修复技术的发展趋势进行了展望。

Formation and Reparation of Defects in Zeolite Membranes

Zeolite membranes bear potential applications in chemical sensors, membrane separation and/or catalysis. The molecular sieving effect is spolied due to the existence of defects in zeolite membranes, resulting in lower separation selevtivity. Therefore, the industrial application of zeolite membranes is still very rare. The categories and formation mechanisms of defects in zeolite membranes are reviewed in this paper. According to the working principles, the reparation methods of zeolite membranes are categorized into repetitious hydrothermal synthesis, hydrocarbon impregnation and coking, surface coating, chemical vapor deposition (CVD) and chemical liquid deposition (CLD). Based on the extensive discussion of the merits and weaknesses of various reparation methods, the trends in reparation of zeolite membranes are prospected.