Mass Transfer Through Graphene-Based Membranes

Valerij Levdansky,Pavel Izák,Olina Šolcová,Karel Friess

doi:10.3390/app10020455

Abstract

The problems related to the transport of gases through nanoporous graphene (NG) and graphene oxide (GO) membranes are considered. The influence of surface processes on the transport of gas molecules through the aforementioned membranes is studied theoretically. The obtained regularities allow finding the dependence of the flux of the gas molecules passing through the membrane on the kinetic parameters which describe the interaction of the gas molecules with the graphene sheets. This allows to take into account the influence of external fields (e.g., resonance radiation), affecting the aforementioned kinetic parameters, on the transport of gas molecules through the membranes. The proposed approach makes it possible to explain some experimental results related to mass transfer in the GO membranes. The possibility of the management of mass transfer through the NG and GO membranes using resonance radiation is discussed.

Highlights

The scope of our work is to describe the transport properties with existing models without any additional data
This allows for the dependence to be found of the flux of gas molecules passing through the membranes on the kinetic parameters which describe the interaction of the gas molecules with the graphene sheets
The proposed in the present paper model for the description of mass transfer in graphene oxide (GO) membranes is related to following main points: the transport of gas molecules in GO membranes is realized mainly through the slit-like pores formed by graphene sheets

Summary

Introduction

The scope of our work is to describe the transport properties with existing models without any additional data. In the present paper is discussed the new method to control the gas transport through NG membranes using external fields (e.g., resonance laser radiation) leading to excitation of gas molecules and changing their interaction with the graphene sheet. In this case do not need any modifications of the original membrane. We consider the possible influence of the surface processes (including the features of the gas molecule scattering by graphene sheet and surface diffusion of adsorbed molecules) on the transport of gases through the NG and GO membranes This allows for the dependence to be found of the flux of gas molecules passing through the membranes on the kinetic parameters which describe the interaction of the gas molecules with the graphene sheets. The core idea of this paper consists in the search of new ways to manage mass transfer in the porous graphene and graphene oxide membranes by means of external fields (e.g., resonance radiation) affecting the above-mentioned kinetic parameters

The Theoretical Description of Mass Transfer Through NG Membranes

Developing of the Model for Mass Transfer Through GO Membranes

Dis vi τi αi dni

Conclusions