Ga Eun Kim , Gyu-Jin Lee , Seoung-Eun Nam , Jinsoo Kim , Sung In Lim , Hyuk Taek Kwon
{"title":"氧化石墨烯涂层密封多晶ZIF-8膜的晶界缺陷","authors":"Ga Eun Kim , Gyu-Jin Lee , Seoung-Eun Nam , Jinsoo Kim , Sung In Lim , Hyuk Taek Kwon","doi":"10.1016/j.memlet.2025.100100","DOIUrl":null,"url":null,"abstract":"<div><div>Here we report that a simple graphene oxide (GO) coating can seal the grain boundary (GB) defects of polycrystalline ZIF-8 membranes and thus improve C<sub>3</sub>H<sub>6</sub>/C<sub>3</sub>H<sub>8</sub> separation performance, especially separation factor. The effectiveness of GB defect sealing was investigated in terms of the number of GO coatings, the extent of GB defects in ZIF-8 membranes, and GO coating method (dip-coating under atmospheric pressure vs. dip-coating under vacuum), allowing us to conclude that the strategy can mend ZIF-8 membranes with a wide range of GB defects. Moreover, the GO sealing enhanced the pressure-resistance of a ZIF-8 membrane to some extent. Lastly, the GO-sealed ZIF-8 membrane was thermally stable and the intrinsic transport properties of a ZIF-8 membrane was not influenced by the presence of GO.</div></div>","PeriodicalId":100805,"journal":{"name":"Journal of Membrane Science Letters","volume":"5 1","pages":"Article 100100"},"PeriodicalIF":4.9000,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Sealing grain boundary defects in polycrystalline ZIF-8 membranes by graphene oxide coating\",\"authors\":\"Ga Eun Kim , Gyu-Jin Lee , Seoung-Eun Nam , Jinsoo Kim , Sung In Lim , Hyuk Taek Kwon\",\"doi\":\"10.1016/j.memlet.2025.100100\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Here we report that a simple graphene oxide (GO) coating can seal the grain boundary (GB) defects of polycrystalline ZIF-8 membranes and thus improve C<sub>3</sub>H<sub>6</sub>/C<sub>3</sub>H<sub>8</sub> separation performance, especially separation factor. The effectiveness of GB defect sealing was investigated in terms of the number of GO coatings, the extent of GB defects in ZIF-8 membranes, and GO coating method (dip-coating under atmospheric pressure vs. dip-coating under vacuum), allowing us to conclude that the strategy can mend ZIF-8 membranes with a wide range of GB defects. Moreover, the GO sealing enhanced the pressure-resistance of a ZIF-8 membrane to some extent. Lastly, the GO-sealed ZIF-8 membrane was thermally stable and the intrinsic transport properties of a ZIF-8 membrane was not influenced by the presence of GO.</div></div>\",\"PeriodicalId\":100805,\"journal\":{\"name\":\"Journal of Membrane Science Letters\",\"volume\":\"5 1\",\"pages\":\"Article 100100\"},\"PeriodicalIF\":4.9000,\"publicationDate\":\"2025-05-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Membrane Science Letters\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2772421225000091\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Membrane Science Letters","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2772421225000091","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Sealing grain boundary defects in polycrystalline ZIF-8 membranes by graphene oxide coating
Here we report that a simple graphene oxide (GO) coating can seal the grain boundary (GB) defects of polycrystalline ZIF-8 membranes and thus improve C3H6/C3H8 separation performance, especially separation factor. The effectiveness of GB defect sealing was investigated in terms of the number of GO coatings, the extent of GB defects in ZIF-8 membranes, and GO coating method (dip-coating under atmospheric pressure vs. dip-coating under vacuum), allowing us to conclude that the strategy can mend ZIF-8 membranes with a wide range of GB defects. Moreover, the GO sealing enhanced the pressure-resistance of a ZIF-8 membrane to some extent. Lastly, the GO-sealed ZIF-8 membrane was thermally stable and the intrinsic transport properties of a ZIF-8 membrane was not influenced by the presence of GO.
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