Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima, 739-8530, Japan.
Department of Physics, Malaviya National Institute of Technology Jaipur, Rajasthan, 302017, India.
Environ Sci Pollut Res Int. 2021 Sep;28(34):46404-46413. doi: 10.1007/s11356-020-11106-2. Epub 2020 Oct 9.
For hydrogen-based energy systems development, purified hydrogen (H) is a basic requirement and it can be achieved by using the H-selective membranes. For having H-selective membranes, it is a decent approach to embed the H-sensitive materials in the polymeric membranes. Palladium (Pd) is one of the widely used materials for hydrogen-selective membranes due to its strong affinity towards H absorption. In the present work, we have used Pd nanoparticles in UV-functionalized track-etched polycarbonate (PC) membranes for better selectivity and permeability of H gas. In the UV-irradiation process of membranes, the photo-fries mechanism leads to the C-O bond breaking from the carbonate group of PC molecules and as a result, there is a high number of bond breaking. This phenomenon provides the more active sites for the attachment of Pd nanoparticles in comparison with the pristine PC membrane. The gas permeability of these membranes suggests that the selectivity of H over nitrogen (N) and carbon dioxide (CO) is increased by the addition of uniformly distributed Pd nanoparticles in the functionalized membranes.
对于基于氢气的能源系统开发，纯化氢气（H）是一个基本要求，可以通过使用 H 选择性膜来实现。为了获得 H 选择性膜，可以将 H 敏感材料嵌入聚合物膜中。钯（Pd）是用于氢气选择性膜的广泛使用的材料之一，因为它对 H 吸收具有很强的亲和力。在本工作中，我们在经过紫外线功能化的轨迹蚀刻聚碳酸酯（PC）膜中使用了钯纳米粒子，以提高 H 气体的选择性和渗透性。在膜的紫外线辐照过程中，光弗莱机制导致 PC 分子的碳酸酯基团中的 C-O 键断裂，从而导致大量键断裂。与原始 PC 膜相比，这种现象为钯纳米粒子的附着提供了更多的活性位点。这些膜的气体渗透性表明，通过在功能化膜中均匀分布钯纳米粒子，提高了 H 对氮气（N）和二氧化碳（CO）的选择性。
