State Key Laboratory of Organic-Inorganic Composites , Beijing University of Chemical Technology , Beijing 100029 , China.
Institute of Nuclear Physics and Chemistry , China Academy of Engineering Physics , Mianyang , Sichuan 621900 , China.
ACS Appl Mater Interfaces. 2018 Sep 26;10(38):32128-32132. doi: 10.1021/acsami.8b10201. Epub 2018 Sep 14.
Separation of hydrogen isotopes is of great importance to produce highly pure hydrogen isotopes for numerous applications, which is however very difficult because of their almost identical thermodynamic properties. Adsorptive separation is considered as a simple, highly efficient, and cost-effective technique compared to the traditional methods, where the key is the suitable adsorbent. Herein, SIFSIX-3-Zn was screened out from the reported metal-organic frameworks (MOFs), exhibiting high selectivities for a D/H mixture by quantum sieving effect. Advanced cryogenic thermal desorption spectroscopy confirms the calculation results, indicating that the selectivities for a 1:1 D/H mixture at 20 K are larger than the values reported so far; especially, it shows a record value of 53.8 at 25 kPa. This demonstrates that this MOF is a promising candidate for highly effective hydrogen isotope separation.
氢同位素的分离对于生产用于众多应用的高纯度氢同位素非常重要，但由于它们几乎相同的热力学性质，这非常困难。与传统方法相比，吸附分离被认为是一种简单、高效且具有成本效益的技术，其关键是合适的吸附剂。在此，从报道的金属-有机骨架（MOFs）中筛选出 SIFSIX-3-Zn，通过量子筛分效应表现出对 D/H 混合物的高选择性。先进的低温热解吸光谱证实了计算结果，表明在 20 K 下对 1:1 D/H 混合物的选择性大于迄今为止报道的值；特别是，在 25 kPa 时，它显示出 53.8 的创纪录值。这表明该 MOF 是高效氢同位素分离的有前途的候选材料。
