ZIF-8 coated polyvinylidenefluoride (PVDF) hollow fiber for highly efficient separation of small dye molecules. (December 2016)

• Record Type: Journal Article
• Authors: Guo, Yi; Wang, Xiaobin; Hu, Pan; Peng, Xinsheng
• Is Part Of: Applied materials today. Volume 5(2016)
• Page Start: 103
• Page End: 110
• Publication Date: 2016-12
• Subjects: ZIF-8 membranes -- PVDF hollow fiber -- Dye molecule separation; Materials science -- Periodicals; Materials -- Research -- Periodicals; 620.1105
• DOI: 10.1016/j.apmt.2016.07.007
• Languages: English
• ISSNs: 2352-9407

Abstract

Graphical abstract: Highlights: Dense ZIF-8 membranes on PVDF hollow fiber were prepared at room temperature. A gelatin layer provide a good substrate for seeds growth on PVDF. The prepared ZIF-8 hollow fiber membrane exhibits excellent small molecular separation. This MOFs/hollow fiber membrane module holds potential for dye-wasted water treatment. Abstract: Molecular separation membranes with high permeance and enhanced rejection are strongly requested to meet rising worldwide demand for dye-wasted water purification and drug production industries. Highly porosity and tunable nanopores of metal organic frameworks have been wildly investigated for gas separation but rarely applied for liquid separation, due to their instability, hard to form continuous thin films which was strongly adhered on porous support, especially on polymer hollow fibers. In this work, by using gelatin-assisted growth process, well continuous about 2 μm thick ZIF-8 membranes strong adhered on both inner side and outside surface of macroporous polyvinylidenefluoride (PVDF) hollow fibers were successfully prepared. The prepared ZIF-8/gelatin/PVDF membranes demonstrated excellent separation performance for Rhodamine B molecules from water with permeance of 137 L m −2 h −1 bar −1 and rejection up to 97.5%, which holds the great potential to extent MOFs-related materials for dye-wasted water purification.