Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 509, Issue 38, Pages 9382-9386Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2011.07.049
Keywords
Bi2S3 nanocrystals; Transmission electron microscopy; Monodispersed
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Funding
- NSF of China [50872145, 20721063, 10776037, 20821140537]
- Ministry of Science and Technology of China [2007CB936301, 2009AA033701, 2009CB930803]
- State Key Basic Research Program of the PRC [2006CB932302]
- Shanghai Leading Academic Discipline Project [B108]
- Fudan Graduate Innovation Funds
- Shanghai Municipal Education Commission
- Shanghai Education Development Foundation [09SG01]
- [9140C4403090902]
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Monodispersed ultrafine Bi2S3 nanocrystals of similar to 3 nm were synthesized via a facile and mild method, in which thioacetamide and bismuth oleate complex were used as the sulfur and bismuth precursors, respectively. The obtained Bi2S3 nanocrystals possessed a high surface area of 305 m(2) g(-1). The nanostructures of Bi2S3 nanocrystals were characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and selective area electron diffraction (SAED) techniques. The optical property of the Bi2S3 nanocrystals was studied by photoluminescence spectroscopy. A remarkable blue shift and a band gap of similar to 1.5 eV were observed. The shape of the Bi2S3 nanocrystals could be tuned by adjusting the initial Bi/S molar ratio and reaction temperature, respectively. A possible burst nucleation mechanism for this monodispersed ultrafine Bi2S3 nanocrystals was proposed. (C) 2011 Elsevier B.V. All rights reserved.
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