• Nano-Enabled Water Technologies

Invited SpeakersProfile Details

Professor Tahar Laoui
Professor Tahar Laoui ​Dr. Tahar Laoui is currently a Professor and Chairman of the Department of Mechanical and Nuclear Engineering at the University of Sharjah, UAE. His research interests are membrane for water treatment and desalination using nanotechnology, structure-property processing relationships in composite materials, and rapid prototyping technologies.

Biography

Dr. Tahar Laoui is currently a Professor and Chairman of the Department of Mechanical and Nuclear Engineering at the University of Sharjah, UAE. Prior to this appointment, he was a Professor in Materials & Manufacturing Engineering in Mechanical Engineering Dept. at King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia. He received his Ph.D. from the University of Washington, Seattle, USA in 1990. His research interests are membrane for water treatment and desalination using nanotechnology, structure-property processing relationships in composite materials, and rapid prototyping technologies. 

For the past several years, he has conducted research in joint collaboration with colleagues from Mechanical Engineering Dept. at MIT, USA, on the development of inorganic membranes for water treatment and water desalination by exploring techniques to investigate and understand the transport of water molecules and ions through macro- and nano-structured materials such as zeolites, alumina-based ceramics, carbon nanotubes and graphene.

All sessions by Professor Tahar Laoui

  • Day 1Monday, January 28th
2:30 pm

Graphene oxide based membrane: adhesion enhancement by plasma treatment and diffusion study of potassium chloride ions

Graphene oxide (GO) and reduced Graphene oxide (rGO) are 2D materials which exhibit unique anti-fouling and anti-bacterial properties along with high water permeability through its 2D channels, good selectivity and good thermal, mechanical and chemical stability. These unique properties offer the opportunity to incorporate GO and rGO and synthesize new membranes for water filtration applications such as Forward Osmosis, pervaporation, Reverse Osmosis, ultrafiltration and nanofiltration.
In this work, we report a diffusion study of KCl ions through plasma treated polyethersulfone (PES) membranes which have been coated with GO and rGO. Layer by Layer (LbL) spin coating process was used to deposit thin Go and rGO films on the PES membrane surface. The membranes were characterized by scanning electron microscopy (SEM), water contact angle measurement (WCA), Fourier transform infrared spectroscopy (FTIR) and Atomic force microscopy (AFM). A side by side diffusion cell was used to evaluate ions blocking performance of GO and rGO layers. The results showed that rGO layers deposited on PES samples significantly enhanced KCl ion blockage to ~93% as compared to 28% ion blockage of bare PES membranes. However, with the GO layers, the PES membranes achieved ~57% KCl ion blockage.

Auditorium between bldg. 4 & 5, level 0 14:30 - 15:00 Details