M. Samy El-Shall
Association of Egyptian-American Scholars
Graphene has attracted great interest for a fundamental understanding of its unique structural and electronic properties and also for important potential applications in nanoelectronics and devices. The combination of highest mobility, thermal, chemical and mechanical stability with the high surface area offers many interesting applications in a wide range of fields including heterogeneous and photocatalysis where metallic and semiconductor nanoparticles can be efficiently dispersed on or within the graphene nanosheets.
This talk will address some important aspects of graphene research dealing with nanocatalysis by metal-graphene nanocomposites, and properties of graphene-quantum dots including Si-graphene nanocomposites.
The enhanced catalytic activity for the Fe-based nanoparticle catalysts supported on graphene in the Fischer-Tropsch Synthesis (FTS) of liquid hydrocarbons will be presented. In addition to high activity, the Fe/graphene catalyst exhibits a remarkable selectivity towards the production of long chain hydrocarbons and unusual stability with no loss of activity over several repeated cycles. The origin of enhancements in activity and stability of the graphene-supported catalysts will be presented and discussed.
We will also present a new top-down approach to produce macroscopic quantities of graphene quantum dots with lateral dimensions less than 10 nm using the recently developed method for the synthesis of hydrogen-terminated graphene (HTG) nanosheets. The solution processing of the HTG nanosheets allows the preparation of graphene quantum dots with tunable size and optical properties. The synthesis of highly luminescence Si-graphene nanocomposites will be presented and applications of these materials for sensing and imaging will be discussed.
This article was published in 3alamaltanmya
sponsored by Future Builders International Academy
Led by Dr.Maha Fouad