Stabilize thin nanoparticle layer of zeolitic imidazole framework-8 (ZIF-8) on different PVDF substrates by contra-diffusion method for high-efficiency ultrafiltration application


Esmaeili M., Khorshidi S., Vatanpour V.

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, vol.109, pp.189-201, 2022 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 109
  • Publication Date: 2022
  • Doi Number: 10.1016/j.jiec.2022.02.002
  • Title of Journal : JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
  • Page Numbers: pp.189-201
  • Keywords: <p>Ceramic/polymer membranes</p>, ZIF-8 metal-organic frameworks, Contra -diffusion technique, PVDF membrane, Antifouling, MIXED MATRIX MEMBRANES, METAL-ORGANIC FRAMEWORKS, COMPOSITE MEMBRANES, BY-LAYER, PERFORMANCE, SEPARATION, MORPHOLOGY, FABRICATION, NANOSHEETS, GROWTH

Abstract

In this research, a contra-diffusion cell, which is an effective instrument for growing inorganic layers on porous substrates, was applied to prepare a thin layer of zeolitic imidazole framework-8 (ZIF-8) on polyvinylidene fluoride (PVDF) ultrafiltration membranes. With using of methanol as a solvent, a thin layer of ZIF-8 was fabricated resulted in a flexible inorganic coated organic membrane. The ZIF-8 nanoparticles were formed as a resistant layer on the outer surface and inner pores of PVDF support and its effect on permeability, flux recovery ratio (FRR) and treatment of colored wastewater was inves-tigated. Manufacturing parameters such as the reaction time between Zn2+ ions and imidazole ligands (16, 24 and 36 h) and concentration of PVDF in the casting solution of the support membranes (18, 20 and 22 wt%) were considered. The SEM images showed the well-growing of uniform and a thin layer of ZIF-8. The membrane performance tests revealed that ZIF-8 decorated membranes have higher pure water flux, BSA protein rejection and FRR related to the uncoated PVDF membrane. The fabricated mem-branes indicated high removal efficiency in three different MW dyes (Rhodamine B, Reactive Green 19 and Direct Black 38), with 75, 85 and 98% rejection, respectively. (C) 2022 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.