کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6588567 | 1423237 | 2018 | 38 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Highly efficient H2/CO2 separation via an ultrathin metal-organic framework membrane
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
We propose a strategy for rapid in situ fabrication of zeolitic imidazolate framework-8 (ZIF-8) hybrid membrane with assistance of the two dimensional (2D) graphitic carbon nitride (g-C3N4) nanosheets at room temperature. The negatively charged g-C3N4 nanosheets with abundant nitrogen coordinating sites are capable to capture and anchor Zn2+ and thus provide a large number of heterogeneous nucleation sites for the formation of initial ZIF-8 crystals. During the cyclical spin coating of the Zn2+/g-C3N4 nanosheets and the ligand (2-methylimidazole), the in situ formed ZIF-8 crystal nucleus on g-C3N4 nanosheets promote the further growth of continues defect-free membranes. The ZIF-8/g-C3N4 membrane with thickness of â¼240â¯nm can be obtained using this strategy within 30â¯min at room temperature, which is attractive for fast and facile preparation of molecular sieving membranes. Moreover, it exhibits promising H2/CO2 separation performance with the selectivity up to 42, which is superior to many other ZIF-8 membranes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 182, 8 June 2018, Pages 180-188
Journal: Chemical Engineering Science - Volume 182, 8 June 2018, Pages 180-188
نویسندگان
Jiamin Hou, Yanying Wei, Sheng Zhou, Yanjie Wang, Haihui Wang,