Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 418, Issue -, Pages 171-177Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2013.12.013
Keywords
Hierarchical; Heterostructures; Core-shell; ZnO nanorod arrays; Au nanoparicles; Photocatalysis
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Funding
- National Natural Science Foundation [21001082, 21273161, 21101117]
- Shanghai Innovation program [13ZZ026]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars of SEM
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning [2013-13]
- Visiting scholar fund of the Key Laboratory for Ultrafine Materials of Ministry of Education
- Fundamental Research Funds for the Central Universities
- East China University of Science and Technology
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Three dimensional dandelion-like hierarchical core-shell Au@ZnO heteroarchitectures with ZnO nanorods grown radially on Au nanoparticle (NP) cores have been successfully prepared with a high yield via a simple solution method involving heteroseed-induced nucleation and subsequent heteroepitaxial growth processes. Briefly, mercaptopropionic acid (MA) modified Au NPs were synthesized beforehand and served as nucleation centers for primary ZnO seed generation and Au@ZnO heteroseed formation. Then an epitaxial growth of ZnO nanorods (ZnO NRs) on the Au@ZnO heteroseeds resulted in the formation of Au@ZnO dandelions. The photocatalytic properties of as-prepared Au@ZnO dandelions were evaluated through rhodamine B (RhB) photodegradation under UV irradiation. The result showed that the Au@ZnO dandelions had improved photocatalytic performance compared with pure ZnO NRs and hybrids of ZnO NRs/Au NPs, due likely to the synergistic effect of the metal-semiconductor heterojunction and the unique dandelion-like hierarchical core-shell structure. (C) 2013 Elsevier Inc. All rights reserved.
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