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Preparation of ZIF-8 derivative composite membrane by freezing assisted-interface reaction method and its pharmaceutical desalination performance

Authors： Wang Chengcheng, Sun Hao, WANG Naixin*, JI Shulan, An QuanFu

Units： nFaculty of Environmet and Life Science, Beijing University of Technology, Beijing 100124, China

KeyWords： Freezing assistance; In situ growth; Nanofiltration membrane; ZIF-8; Pharmaceutical desalination

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2024,44(3):1-9

Abstract：

The nanofiltration membrane separation technology has great potential for application in the field of pharmaceutical desalination. The development of new membrane materials with high performance has a great challenge. In this study, a ZIF-8 separation layer was prepared on alumina substrate using a freezing assisted-interface reaction method. Subsequently, the ZIF-8 derivatives (ZnS) were formed through sulfurization treatment to improve the permeability and stability of the nanofiltration membrane. The structure and morphology of ZIF-8 and its derivative composite membranes were characterized by SEM, EDS, XRD, FT-IR, and AFM. The obtained ZIF-8 and its derivative composite membranes were used for pharmaceutical desalination. The effects of precursor molar ratio, concentration, and reaction temperature on nanofiltration performance were investigated. With the optimal conditions, the ZnS nanofiltration membrane exhibited a rejection rate of 99.1% for tetracycline, less than 10% for NaCl, and a flux of 335.6 LMH/MPa, demonstrating good pharmaceutical desalination performance and stability.

Funds：

国家自然科学基金项目(22178008, 22125801)

AuthorIntro：

王程程（1998-），女，山东泰安人，硕士研究生，主要从事金属有机框架纳滤膜的研究

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