Title

First Principles Study of Photocatalytic Activity of Graphene-ZnO Nanocomposites

Faculty Sponsor

Haiying He

College

Arts and Sciences

Department/Program

Physics and Astronomy

ORCID Identifier(s)

orcid.org/0000-0002-6680-8294

Document Type

Poster Presentation

Celebration Date

Summer 7-28-2015

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.

Biographical Information about Author(s)

Stephen is a chemical physics major at Valparaiso University. His coursework provides him with a strong foundation in both physics and chemistry that is necessary for research in computational work. In the future, he plans to attend medical school to pursue an MD and PhD in pediatric neurosurgery.

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