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Polycarbene-bearing membrane surface containing silver species for size and charge selective molecular separation

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posted on 2022-09-01, 10:25 authored by Nagaraj Naik, Prajwal Sherugar, KA Vishnumurthy, Arthanareeswaran Gangasalam, Diganta DasDiganta Das, Mahesh Padaki

The separation of narrow-sized molecules through membrane technology is a very tedious task. A highly selective molecular separation process can be achieved from hydrophilic membranes with well-defined pores. Herein, we report a blend membrane surface modified with polycarbene stabilized silver species for molecular separation. The excellent separation performance and the high flux of the selective membrane have been attributed to the thin selective layer containing hollow spheres and that filled with silver nanoparticles, which provide the complete rejection of dyes bearing molecular sizes >1.4 nm. The outstanding separation performance of the surface-modified membrane is due to both Donnan exclusion and adsorption effects. The simple surface-modification strategy for blend membranes is adaptable to a variety of other transition metals. Due to the simple fabrication process and inspiring permeability (>80 L/m2/h/), these membranes are economic for the separation of small molecules with good separation efficiency (>95%).

Funding

Nanomission project, DST, India (SR/NM/NS-20/2014)

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Chemical Engineering

Published in

Environmental Science: Water Research & Technology

Volume

8

Issue

10

Pages

2381-2397

Publisher

Royal Society of Chemistry

Version

  • AM (Accepted Manuscript)

Rights holder

© The Royal Society of Chemistry

Publisher statement

This paper was accepted for publication in the journal Environmental Science: Water Research & Technology and the definitive published version is available at https://doi.org/10.1039/d2ew00400c

Acceptance date

2022-08-24

Publication date

2022-08-26

Copyright date

2022

ISSN

2053-1400

eISSN

2053-1419

Language

  • en

Depositor

Dr Diganta Das. Deposit date: 26 August 2022

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