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Updated: Feb 15, 2026

Synthesis and Characterization of Functionalized Metal-organic Frameworks
Published on: September 5, 2014
Electrospun membrane based on chitosan/ polyvinyl alcohol/sulfur-functionalized metal organic framework for efficient
Qunhua Zhou1, Yan Li2, Yu Sun3
1Department of Medical Chemistry, Medical School, Zhengzhou Health College, Zhengzhou, 450000, PR China; Center for Molecular Science and Engineering, College of Science, Northeastern University, Shenyang, 110819, PR China.
Abstract:
Traditional mesoporous materials and metal-organic framework (MOF) materials encounter bottlenecks such as small particle size, difficulty in recovery, and low mechanical strength in practical applications, which significantly limit their engineering applications in complex water containing-Hg(II) environments. In this study, a new composite membrane (CS/PVA/MIP-203-S) was prepared by electrospinning technology with chitosan (CS), polyvinyl alcohol (PVA), and thiol-functionalized MOF (MIP-203-S) for efficient Hg(II) removal. The composite membrane exhibited a multilayered porous structure, high thermal stability and uniform MOF dispersion. The removal rate of CS/PVA/MIP-203-S for Hg(II) was 96.2% under static conditions when the initial Hg(II) concentration, pH, adsorption temperature and time were 50 mg/L, 4, 298 K and 120 min, respectively. Moreover, the electrospun membrane showed excellent selectivity, reusability (over 88% efficiency after 5 cycles), and adaptability to wide pH range. This adsorption material follows pseudo-second-order kinetics and Langmuir models, with XPS confirming HgS coordination as the primary mechanism. The corresponding maximum adsorption capacity could reach 512.5 mg/g. The composite membrane combines the efficient chemical adsorption characteristics of MIP-203-S, and effectively overcomes the limitations of traditional mesoporous materials in practical applications. This work demonstrates the electrospun membrane's strong potential for industrial wastewater remediation as environmentally friendly adsorbent.
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