Size-controlled electron transfer and photocatalytic activity of ZnO-Au nanoparticle composites

Jaeil Lee, Hyeong Seop Shim, Myeongsoon Lee, Jae Kyu Song, Dongil Lee

Research output: Contribution to journalArticle

147 Citations (Scopus)

Abstract

This Letter describes size-controlled photocatalytic activity of ZnO nanoparticles coated with glutathione-protected gold nanoparticles with diameters of 1.1, 1.6, and 2.8 nm. The photocatalytic activity of the ZnO-Au composites was found to increase with increasing gold size for both oxidative and reductive catalytic reactions. Photoluminescence decay dynamics of the composites showed that the electron-transfer rate from the photoexcited ZnO to gold nanoparticle also increased as the gold size increased. These results demonstrate that the photogenerated electron transfer and the resulting catalytic activity of the composites can be controlled by the size of the mediating gold capacitors.

Original languageEnglish
Pages (from-to)2840-2845
Number of pages6
JournalJournal of Physical Chemistry Letters
Volume2
Issue number22
DOIs
Publication statusPublished - 2011 Nov 17

Fingerprint

Gold
electron transfer
gold
Nanoparticles
nanoparticles
composite materials
Electrons
Composite materials
glutathione
Glutathione
catalytic activity
Catalyst activity
capacitors
Photoluminescence
Capacitors
photoluminescence
decay

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Lee, Jaeil ; Shim, Hyeong Seop ; Lee, Myeongsoon ; Song, Jae Kyu ; Lee, Dongil. / Size-controlled electron transfer and photocatalytic activity of ZnO-Au nanoparticle composites. In: Journal of Physical Chemistry Letters. 2011 ; Vol. 2, No. 22. pp. 2840-2845.
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Size-controlled electron transfer and photocatalytic activity of ZnO-Au nanoparticle composites. / Lee, Jaeil; Shim, Hyeong Seop; Lee, Myeongsoon; Song, Jae Kyu; Lee, Dongil.

In: Journal of Physical Chemistry Letters, Vol. 2, No. 22, 17.11.2011, p. 2840-2845.

Research output: Contribution to journalArticle

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