由中科院大连化学物理所研究员杨维慎和李砚硕带领的研究团队,日前首次制备出一种远远“薄于蝉翼”的纳米片分子筛膜。12月12日,相关研究成果发表在《科学》杂志上。常规分子筛膜的厚度为蝉翼厚度的10倍以上,这种纳米片分子筛膜仅1 nm厚,为蝉翼厚度的1‰,且具有如“筛眼”般高度规整的孔道,可以精确筛分尺寸差异仅为0.04 nm的氢气和二氧化碳分子,从而将后者有效截留。氢气和二氧化碳的分离是清洁能源和二氧化碳捕获中的关键步骤,利用选择性膜材料,实现二者分子水平的分离,是工业界长期以来的梦想。对于常规膜材料,均存在渗透通量和分离选择性之间此消彼长的 A research team led by Yang Weishen and Li Yan Shuo, researchers at Dalian Institute of Chemical Physics, Chinese Academy of Sciences, recently prepared for the first time a nanoflake molecular sieve membrane far “thinner than onionwing”. December 12, related research published in the “Science” magazine. Conventional molecular sieve membrane thickness is more than 10 times the thickness of cicada wing, the nanoflake molecular sieve membrane is only 1 nm thick, 1 ‰ thick cicada wing, and has such as “sieve ” highly regular channels, can be precise The difference in size is only 0.04 nm for hydrogen and carbon dioxide molecules, effectively blocking the latter. The separation of hydrogen and carbon dioxide is a crucial step in clean energy and carbon dioxide capture. The use of selective membrane materials to achieve molecular separation between the two is a long-cherished dream in the industry. For conventional membrane materials, there is a trade-off between permeation flux and separation selectivity