{"id":137193,"date":"2024-01-16T07:37:00","date_gmt":"2024-01-16T06:37:00","guid":{"rendered":"https:\/\/renewable-carbon.eu\/news\/?p=137193"},"modified":"2024-01-15T10:15:05","modified_gmt":"2024-01-15T09:15:05","slug":"a-glass-that-sifts-carbon-dioxide","status":"publish","type":"post","link":"https:\/\/renewable-carbon.eu\/news\/a-glass-that-sifts-carbon-dioxide\/","title":{"rendered":"A Glass That Sifts Carbon Dioxide"},"content":{"rendered":"\n\n\n
\"\nOksana
Oksana Smirnova (left) and Dr Alexander Knebel (right) have developed innovative hybrid glasses.
Image: Jens Meyer (University of Jena)<\/figcaption><\/figure>\n\n\n\n

Separating carbon dioxide molecules from gas mixtures requires materials with extremely fine pores. Researchers from Friedrich Schiller University Jena, in cooperation with the University of Leipzig and the University of Vienna, have now found a novel way to do this: they transformed crystalline metal-organic framework compounds into glass. In doing so, they managed to reduce the pore size of the material to the point where it becomes impermeable to certain gas molecules. They report their findings in the journal \u201cNature Materials<\/em><\/a>\u201d.<\/strong><\/p>\n\n\n

\n
\"The
The hybrid glass based on metal-organic networks is suitable for gas separation. Image: Jens Meyer (University of Jena)<\/figcaption><\/figure><\/div>\n\n\n

Compressed Metal-Organic Frameworks<\/h3>\n\n\n\n
\n

\u201cActually, these glass-like materials were previously considered non-porous,\u201d explains Dr Alexander Knebel from the Otto Schott Institute of the University of Jena<\/strong>, who led this work. He elaborates: \u201cThe starting material, i.e., the crystalline framework compounds have very clearly defined pores and also a large internal surface area. Hence, they are also researched as materials for storing or separating gases. However, this defined structure is lost during melting and compression. And we took advantage of that.\u201d<\/p>\n\n\n\n

\u201dMetal-organic framework compounds consist of metal ions linked together by rigid organic molecules,\u201d describes the leader of the junior research group,<\/strong> explaining the material. \u201cIn the spaces of these three-dimensional, regular grids, gas molecules can move easily. During the glass processing, we compressed the material. Put simply, we were able to squeeze the pores down to the desired size,” he illustrates.<\/p>\n<\/blockquote>\n\n\n\n

Ordered Disorder<\/h3>\n\n\n\n

Even though the overall structure of the crystal disappears during melting \u2013 parts of the crystal retain their structure. \u201c<\/em><\/p>\n\n\n\n

\n

In technical terms, this means: during the transition from crystal to glass, the long-range order of the material is lost, but the short-range order is preserved,\u201d explains Knebel<\/strong>. Oksana Smirnova, a doctoral student at the University of Jena and the lead author of the work<\/strong>, adds: \u201cWhen we now melt and compress this material, the porous interstices also change.\u201d <\/p>\n<\/blockquote>\n\n\n\n

As a result, channels with constrictions \u2013 or even dead ends \u2013 are created, and consequently, some gases simply no longer fit through.<\/p>\n\n\n\n

In this way, the group achieved pore diameters of 0.27 to 0.32 nanometres in the material, with an accuracy of one hundredth of a nanometre. <\/p>\n\n\n\n

\n

\u201cFor illustration: This is about ten thousand times thinner than a human hair and a hundred times thinner than a DNA double helix. With this pore size, we were able to separate, for example, carbon dioxide from ethane,\u201d explains Knebel<\/strong>. \u201cOur breakthrough in the field is probably the high quality of the glasses and the precise adjustability of the pore channels,\u201d Knebel<\/strong> categorises the work. \u201cAnd our glasses are also several centimetres in size,\u201d he adds.<\/p>\n\n\n\n

\u201cOne goal of this work is to develop a glass membrane for environmental applications. Because separating carbon dioxide from gases is undoubtedly one of the great technological challenges of our time,\u201d says Knebel<\/strong>. \u201cThat\u2019s why I am also grateful for the support of this work through the Breakthroughs Programme of the Carl Zeiss Foundation \u2013 and for the outstanding commitment of my doctoral student Oksana Smirnova, who contributed significantly to the success of this work.\u201d<\/p>\n<\/blockquote>\n\n\n\n

Original publication<\/strong><\/h3>\n\n\n\n

Oksana Smirnova, Seungtaik Hwang, Roman Sajzew, Lingcong Ge, Aaron Reupert,Vahid Nozari, Samira Savani, Christian Chmelik, Michael R. Reithofer, LotharWondraczek, J\u00f6rg K\u00e4rger, Alexander Knebel, “Precise control over gas transporting channels in zeolitic imidazolateframework glasses”, Nature Materials<\/em>, 2023<\/strong>, DOI: 10.1038\/s41563-023-01738-3<\/a><\/p>\n\n\n\n

<\/p>\n\n\n\n

Contact<\/h3>\n\n\n\n

Dr Alexander Knebel
Chair of Glass Chemistry
E-Mail: alexander.knebel@uni-jena.de<\/a>Tel.: +49 3641 9-48505<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Separating carbon dioxide molecules from gas mixtures requires materials with extremely fine pores. Researchers from Friedrich Schiller University Jena, in cooperation with the University of Leipzig and the University of Vienna, have now found a novel way to do this: they transformed crystalline metal-organic framework compounds into glass. In doing so, they managed to reduce […]<\/p>\n","protected":false},"author":59,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","nova_meta_subtitle":"Research Group Develops a Glass Material That Precisely Separates Gases","footnotes":""},"categories":[5572,5571],"tags":[10744,19803,23348],"supplier":[11139,1457,1938],"class_list":["post-137193","post","type-post","status-publish","format-standard","hentry","category-bio-based","category-co2-based","tag-carboncapture","tag-filters","tag-gases","supplier-carl-zeiss-stiftung","supplier-universitaet-jena","supplier-nature-materials-magazine"],"_links":{"self":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts\/137193","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/users\/59"}],"replies":[{"embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/comments?post=137193"}],"version-history":[{"count":0,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts\/137193\/revisions"}],"wp:attachment":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/media?parent=137193"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/categories?post=137193"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/tags?post=137193"},{"taxonomy":"supplier","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/supplier?post=137193"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}