Lee Nahyeon, Ahn Yun-Ho, Kim Jaheon, Eum Kiwon
School of Chemical Engineering, Soongsil University, Seoul 06978, Republic of Korea.
Membranes (Basel). 2024 Oct 14;14(10):216. doi: 10.3390/membranes14100216.
This study presents a novel approach for fabricating ZIF-8 membranes supported on α-alumina hollow fibers through the introduction of a graphene oxide (GO) gutter layer and the application of zinc oxide (ZnO) Atomic Layer Deposition (ALD). The method successfully addressed key challenges, including excessive precursor penetration and membrane thickness. The introduction of the GO layer and subsequent ZnO ALD treatment significantly reduced membrane thickness to approximately 300 nm and eliminated delamination issues between the GO layer and the alumina support. The optimized membranes demonstrated enhanced propylene permeance, with values approximately three times higher than those of membranes without GO, and achieved higher separation factors, indicating minimal inter-crystalline defects. Notably, the GO layer influenced the microstructure, leading to an increase in permeance with rising temperatures. These findings highlight the potential of this strategy for developing high-performance ZIF-8 membranes for gas separation applications.
本研究提出了一种通过引入氧化石墨烯（GO）沟槽层并应用氧化锌（ZnO）原子层沉积（ALD）来制备负载在α-氧化铝中空纤维上的ZIF-8膜的新方法。该方法成功解决了关键挑战，包括前驱体过度渗透和膜厚度问题。GO层的引入和随后的ZnO ALD处理显著降低了膜厚度至约300nm，并消除了GO层与氧化铝载体之间的分层问题。优化后的膜表现出增强的丙烯渗透率，其值比没有GO的膜高出约三倍，并且实现了更高的分离因子，表明晶间缺陷最少。值得注意的是，GO层影响了微观结构，导致渗透率随温度升高而增加。这些发现突出了该策略在开发用于气体分离应用的高性能ZIF-8膜方面的潜力。
