Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 460, Issue -, Pages 113-118Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2015.08.053
Keywords
Zinc oxide nanoparticles; Hybrid Au oxide nanoparticles; Au nanoparticles; Au thiocyanate; Photocatalysis
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Funding
- Israel Science Foundation (ISF)
- Kreitman Graduate School at Ben Gurion University
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Growth of metal domains on semiconductor nanoparticles is known to enhance their photocatalytic properties. We prepared ZnO nanoparticles decorated with metallic Au domains through a new one-pot microwave-based strategy. The synthetic route utilized microwave-heating of a mixture of only three components: Zn2+ salt, Au(SCN) i which served as a precursor for metallic gold, and Tris base. The Tris molecules had a dual role in the process, both shaping the morphology of the ZnO particles, as well as constituting docking and nucleation sites for the Au(SCN)(4)(-) ions. The Au complex subsequently underwent spontaneous crystallization/reduction without co-addition of reducing or stabilizing agents, yielding Au nanoparticles attached to the ZnO surface. We show that the hybrid Au/ZnO nanoparticles exhibited enhanced photocatalytic properties compared to the plain ZnO nanoparticles. (C) 2015 Elsevier Inc. All rights reserved.
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