期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 2, 期 22, 页码 2840-2845出版社
AMER CHEMICAL SOC
DOI: 10.1021/jz2013352
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资金
- Mid-Career Researcher Program [2011-0029735]
- Basic Science Research Program [2010-0009244, 2009-0068705]
- World Class University [R32-2008-000-10217-0]
- NRF [2009-0093823]
- Ministry of Education, Science and Technology
- Yonsei University
- National Research Foundation of Korea [2011-0029735, 2010-0009244, 과06A1503, 2009-0068705, R32-2011-000-10217-0, 2009-0093823] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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.
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