Size-Controlled Electron Transfer and Photocatalytic Activity of ZnO-Au Nanoparticle Composites

作者：Lee Jaeil; Shim Hyeong Seop; Lee Myeongsoon; Song Jae Kyu; Lee Dongil^*

来源：Journal of Physical Chemistry Letters, 2011, 2(22): 2840-2845.

DOI：10.1021/jz2013352

This Letter describes size-controlled photocatalytic activity of ZnO nanoparticles coated with glutathione-protected gold nanopartides 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.

• 出版日期2011-11-17