First Principle Study of Photocatalytic Activity of Graphene-Semiconductor Nanocomposites
Faculty Sponsor
Haiying He
College
Arts and Sciences
Discipline(s)
Physics and Astronomy
Presentation Type
Poster Presentation
Symposium Date
Spring 4-23-2016
Abstract
The photocatalytic activity of graphene-semiconductor nanocomposites and their ability to effectively activate and reduce CO2 has attracted significant attention in the field of computational physics. In this work, the density functional theory has been employed to investigate the adsorption and initial activation of CO2 on ZnO nanoclusters, and subsequently on graphene-ZnO nanocomposite. Two stoichiometric clusters (ZnO)6 and (ZnO)12 were considered, and it has been found that the adsorption of the larger cluster on the graphene sheet is stronger and more favorable. In addition, (ZnO)12 exhibited one electron activation of CO2 while (ZnO)6 failed to adequately activate from its molecular O=C=O linear molecular nature. A variety of adsorption configurations of CO2 on different binding sites on ZnO will be presented and the effect of the substrate graphene will be discussed.
Recommended Citation
Sekoulopoulos, Stephen P., "First Principle Study of Photocatalytic Activity of Graphene-Semiconductor Nanocomposites" (2016). Symposium on Undergraduate Research and Creative Expression (SOURCE). 495.
https://scholar.valpo.edu/cus/495
Biographical Information about Author(s)
Stephen Sekoulopoulos is a sophomore biochemistry major and also a member of Valparaiso University's Christ College. He has a strong foundation in both chemistry and physics which gives him a strong foundation in this particular field. He hopes to attend medical school after his undergraduate studies in order to pursue pediatric neurosurgery.