Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 474, Issue 1-2, Pages 463-467Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2008.06.115
Keywords
Nanostructured materials; Gas-solid reactions; Scanning electron microscopy; Transmission electron microscopy
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Funding
- National Natural Science Foundation of China [60571029, 50672088]
- Zhejiang Provincial Natural Science Foundation [Z605131]
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We designed a facile thermal conversion route to synthesize 2H-WS2 nanoflakes using different tungsten oxide nanorods and S powder as starting reaction reagents. Various sizes and dimensions of nanoflakes with very regular hexagonal outer shapes and smooth surfaces were obtained by using different tungsten oxide nanorods such as W18O49 and WO3 as precursors. The structural properties and formation mechanisms of the 2H-WS2 nanoflakes were systematically investigated. It is found that both the size of tungsten oxide nanorods and reaction temperatures play crucial roles in the formation of regular hexagonal WS2 nanoflakes. These results may give a new insight to the syntheses of other layer-structural MX2 nanotructures (M = transition metal, X = S, Se). (C) 2008 Elsevier B.V. All rights reserved.
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