Metal oxide nanoparticle photocatalysts modified with monolayer-protected gold clusters

Dongil Lee, Seonghye Kim, Piyadarsha Amaratunga, Nayane Udawatte, Guda Ramakrishna

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A significant challenge in solar energy utilization is to identify and develop materials that can efficiently trap and store solar energy and allow tunable and controllable transfer of that energy. Central to the material design is enhancing photoinduced charge separation and storage, and controlling the use of stored charge to carry out selective catalytic reactions. We present photocatalytic activities of metal oxide nanoparticles such as TiO2 and ZnO modified with structurally and energetically well-defined monolayer-protected gold clusters (MPCs) passivated with tiopronin or glutathione in the photocatalytic degradation of industrial dye molecules. The photocatalytic activities are found to be greatly enhanced with MPC modification. The photocatalytic reactions were performed with various dye molecules to understand the enhancing mechanism of the catalytic activities. In addition, the effects of MPC core size on the dynamics of photoinduced charge transfer and the photocatalytic activity will be presented.

Original languageEnglish
Title of host publicationAmerican Chemical Society - 238th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
Publication statusPublished - 2009
Event238th National Meeting and Exposition of the American Chemical Society, ACS 2009 - Washington, DC, United States
Duration: 2009 Aug 162009 Aug 20

Publication series

NameACS National Meeting Book of Abstracts
ISSN (Print)0065-7727

Other

Other238th National Meeting and Exposition of the American Chemical Society, ACS 2009
CountryUnited States
CityWashington, DC
Period09/8/1609/8/20

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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  • Cite this

    Lee, D., Kim, S., Amaratunga, P., Udawatte, N., & Ramakrishna, G. (2009). Metal oxide nanoparticle photocatalysts modified with monolayer-protected gold clusters. In American Chemical Society - 238th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers (ACS National Meeting Book of Abstracts).