MCATM Seminar: Wanqin Jin - Design and Fabrication of Graphene-based Membranes for Molecular Separation

Event Name MCATM Seminar: Wanqin Jin - Design and Fabrication of Graphene-based Membranes for Molecular Separation
Start Date 31st Jan 2017 11:00am
End Date 31st Jan 2017 12:00pm
Duration 1 hour
Description

Abstract

Graphene and its derivatives (e.g., graphene oxide (GO)) have become emerging nano-building blocks for separation membranes featuring distinct laminar structures and tunable physicochemical properties. Extraordinary molecular separation properties for purifying water and gases have been demonstrated by graphene-based membranes, which have attracted a huge surge of interest during the past few years.

However, most of the graphene-based membranes are polymeric supported or free-standing, whose practical application is limited due to the lack of mechanical strength and thermal and chemical stability.

To address this problem, we demonstrated a scalable fabrication of GO membranes on ceramic hollow fiber substrate and showed good PV dehydrotion of aqueous organic solution. Moreover, we demonstrated a novel bio-inspired strategy that utilizes the synergistic effect of a hydrophilic polymer and GO laminates to realize fast water-transport channels for constructing high-efficiency membrane.

For gas separation, we proposed a novel type of membrane with fast and selective gas-transport channels of GO laminates enabled by polymer-GO hydrogen bonding. The as-prepared GO-based membrane showed excellent CO2 permeation performance and extraordinary operational stability.