Issue 4, 2023

Ce-MOF infused membranes with enhanced molecular sieving in the application of dye rejection

Abstract

Metal–organic frameworks (MOFs) have been recognized for their promising adsorption-based remedies in decontaminating water sources, but regeneration of spent adsorbent remains a concern. Herein, we developed size- and charge-selective MOF-infused polymeric (PSf) membranes for continuous dye removal based on size and the Donnan exclusion theory. Ce-UiO-66 MOF was synthesized and infused into the PSf matrix to impart hydrophilicity and surface charge. This led to the observation of inherited enhanced flux with improved rejection efficiency. The as-synthesized membranes demonstrated size-selective dye separation among methylene blue (MB), methyl orange (MO), Eriochrome Black T (EBT), rhodamine B (RB), alcian blue (AB), neutral red (NR), and alizarin (AZ) irrespective of charge and intermolecular interactions thereof. The intact MOF infused in the PSf matrix acted upon the improvement of membrane performance such as pure water flux reaching 39.21 L m−2 h−1 with rejection efficiency ∼98% for both MB and AB and ∼99% for EBT. The current work discusses the rational design of modern MOF–PSf membranes with polychronicity in hydrophilicity, porosity and flux, making them out of the ordinary tools for dye rejection. Therefore, this new membrane finds application in size- and charge-selective dye removal.

Graphical abstract: Ce-MOF infused membranes with enhanced molecular sieving in the application of dye rejection

Supplementary files

Article information

Article type
Paper
Submitted
08 Dec 2022
Accepted
21 Feb 2023
First published
07 Mar 2023

Environ. Sci.: Water Res. Technol., 2023,9, 1216-1230

Ce-MOF infused membranes with enhanced molecular sieving in the application of dye rejection

U. Nellur, N. S. Naik, R. M. Rego, M. Kigga, G. Arthanareeswaran and M. Padaki, Environ. Sci.: Water Res. Technol., 2023, 9, 1216 DOI: 10.1039/D2EW00931E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements