Xiufang Li, Yanxi Tan, Zhanfeng Ju, Wenjing Wang and Daqiang Yuan
{"title":"Exploration of functional group effects on D2/H2 separation selectivity within the UiO-66 framework†","authors":"Xiufang Li, Yanxi Tan, Zhanfeng Ju, Wenjing Wang and Daqiang Yuan","doi":"10.1039/D4QI02802C","DOIUrl":null,"url":null,"abstract":"<p >The efficient separation of deuterium from hydrogen remains a significant challenge due to the limitations of conventional techniques, such as cryogenic distillation and the Girdler-sulfide process combined with electrolysis, which are char-acterized by substantial energy demands and relatively low separation coefficients. In contrast, the quantum sieving effect, based on porous materials, offers a promising approach to overcoming these challenges. This study presents a novel application of strong adsorption sites (μ<small><sub>3</sub></small>-OH group) within the nanoporous metal–organic framework of <strong>UiO-66</strong> for hydrogen isotope separation. By incorporating diverse organic functional groups into <strong>UiO-66</strong>, we successfully synthesized four derivative materials: <strong>UiO-66–NH<small><sub>2</sub></small></strong>, <strong>UiO-66–CH<small><sub>3</sub></small></strong>, <strong>UiO-66–NO<small><sub>2</sub></small></strong>, and <strong>UiO-66–Ph</strong>. Experimental data reveal that the introduction of these functional groups modulated the material's pore size and channel polarity, significantly impacting its adsorption and separation performance for hydrogen isotopes. Notably, <strong>UiO-66–NH<small><sub>2</sub></small></strong>, with the smallest pore size and highest channel polarity, exhibited superior hydrogen isotope adsorption capacity and selectivity, highlighting its potential as an effective adsorbent for isotope separation.</p>","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":" 2","pages":" 701-706"},"PeriodicalIF":6.1000,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/qi/d4qi02802c?page=search","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Inorganic Chemistry Frontiers","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2025/qi/d4qi02802c","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
The efficient separation of deuterium from hydrogen remains a significant challenge due to the limitations of conventional techniques, such as cryogenic distillation and the Girdler-sulfide process combined with electrolysis, which are char-acterized by substantial energy demands and relatively low separation coefficients. In contrast, the quantum sieving effect, based on porous materials, offers a promising approach to overcoming these challenges. This study presents a novel application of strong adsorption sites (μ3-OH group) within the nanoporous metal–organic framework of UiO-66 for hydrogen isotope separation. By incorporating diverse organic functional groups into UiO-66, we successfully synthesized four derivative materials: UiO-66–NH2, UiO-66–CH3, UiO-66–NO2, and UiO-66–Ph. Experimental data reveal that the introduction of these functional groups modulated the material's pore size and channel polarity, significantly impacting its adsorption and separation performance for hydrogen isotopes. Notably, UiO-66–NH2, with the smallest pore size and highest channel polarity, exhibited superior hydrogen isotope adsorption capacity and selectivity, highlighting its potential as an effective adsorbent for isotope separation.