| Highly water-selective membranes based on hollow covalent organic frameworks with fast transport pathways | |
Yang, H ; Cheng, XP; Cheng, XX; Pan, FS; Wu, H; Liu, GH; Song, YM; Cao, XZ; Jiang, ZY; Cao XZ(曹兴忠)
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| 2018 | |
| Source Publication | JOURNAL OF MEMBRANE SCIENCE
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| ISSN | 0376-7388 |
| EISSN | 1873-3123 |
| Volume | 565Pages:331-341 |
| Subtype | Article |
| Abstract | Covalent organic frameworks (COFs) are attractive candidates for membrane separation owing to their well-ordered channels and facilely tailored functionalities. However, the development of COF-based membranes remains in its infancy. To establish novel hierarchical structures in COFs, in this study, a facile template-directed approach is exploited for constructing hollow COF nanospheres. An imine-linked COF TpBD, derived from 1,3,5-triformylphloroglucinol (Tp) and benzidine (BD), was selected as the building block due to its rich hydrophilic groups and high stability. The synthesized hollow TpBD (H-TpBD) nanospheres were introduced into sodium alginate (SA) matrices to fabricate water-selective hybrid membranes. The H-TpBD nanospheres confer the membranes rapid diffusion pathways and abundant interacting sites for water molecules, thus fast water-selective permeation through the membranes was achieved. The hybrid membranes exhibit the optimal performance with permeation flux of 2170 g m(-2) h(-1) and separation factor of 2099 when used for dehydrating 90 wt % ethanol aqueous solution at 76 degrees C. The effects of hollow structures of H-TpBD on membrane performance were investigated and the molecular transport mechanisms through the membranes were elucidated. Besides, the favorable compatibility between SA and H-TpBD endows the hybrid membranes with long-term stability. |
| Keyword | Covalent organic frameworks Hollow structures, Hybrid membranes Ethanol dehydration Water-selective permeation |
| DOI | 10.1016/j.memsci.2018.08.043 |
| WOS Keyword | MIXED-MATRIX MEMBRANES ; COMPOSITE MEMBRANES ; SODIUM ALGINATE ; HYBRID MEMBRANE ; PERVAPORATION PERFORMANCE ; CARBON NANOTUBES ; DEHYDRATION ; SEPARATION ; MICROSPHERES ; CRYSTALLINE |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Engineering ; Polymer Science |
| WOS Subject | Engineering, Chemical ; Polymer Science |
| WOS ID | WOS:000444090600033 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ihep.ac.cn/handle/311005/286311 |
| Collection | 实验物理中心 多学科研究中心 |
| Affiliation | 中国科学院高能物理研究所 |
| First Author Affilication | Institute of High Energy |
| Recommended Citation GB/T 7714 | Yang, H,Cheng, XP,Cheng, XX,et al. Highly water-selective membranes based on hollow covalent organic frameworks with fast transport pathways[J]. JOURNAL OF MEMBRANE SCIENCE,2018,565:331-341. |
| APA | Yang, H.,Cheng, XP.,Cheng, XX.,Pan, FS.,Wu, H.,...&曹兴忠.(2018).Highly water-selective membranes based on hollow covalent organic frameworks with fast transport pathways.JOURNAL OF MEMBRANE SCIENCE,565,331-341. |
| MLA | Yang, H,et al."Highly water-selective membranes based on hollow covalent organic frameworks with fast transport pathways".JOURNAL OF MEMBRANE SCIENCE 565(2018):331-341. |
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