Iranian Journal of Physics Research

Cationic dyes adsorption study on graphene- Polyvinylidene fluoride ‎nanocomposite membranes

Document Type : Original Article

Authors

M Khansanami
A Esfandiar
H R Ghanbari

‎Department of physics, Sharif University of Technology, Theran, Iran ‎ ‎

https://doi.org/10.47176/ijpr.21.2.61070
Abstract
Polyvinylidene fluoride (PVDF) is one of the well-known polymers in different types of ‎membranes for water treatment applications, because of its unique chemical, mechanical and ‎thermal properties. Because of the presence of fluorine groups in polymer chain, the PVDF has ‎a negative electrostatic surface charge that makes the PVDF a suitable adsorbing material for ‎cationic dyes such as Rhodamine B (RB) and Methylene Blue (MB). The presence of two-‎dimensional graphene oxide sheets with negative electrostatic surface charge in the PVDF ‎matrix, can improve the adsorption of the dyes on PVDF/graphene oxide (PGO) composite ‎membranes due to increasing of negative electrostatic charge. In this study, we aimed to ‎explore synthesis and characterization of the PGO composite membranes by Scanning Electron ‎Microscopy (SEM), Atomic Force Microscopy (AFM), Raman spectroscopy, X-Ray diffraction ‎‎(XRD), to confirm the effective presence of the GO sheets in PVDF matrix.  In continue, the ‎mechanisms of physical adsorption of the dyes on PGO membranes have been investigated‎‎.‎

Keywords

PGO composite membranes
water treatment
effects of surface charge
electrostatic ‎interactions
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