Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 340, Issue 1-3, Pages 66-69Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2009.03.007
Keywords
Bismuth; Nanospheres; Poly(vinyl pyrrolidone); Characteristic
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Funding
- National Nature Science Foundation [50672075]
- NCET [1308040]
- MOE
- Xi'an Science & Technology Foundation [CXY08006]
- Fundamental Research Foundation of NPU of China [NPU-FFR-200703]
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Poly(vinyl pyrrolidone)-capped bismuth nanospheres were synthesized by a simple and convenient wet chemical method. In the process, bismuth nitrate was reduced by ethylene glycol in the presence of poly(vinyl pyrrolidone) (PVP) at 185 degrees C in air. PVP was used as a protecting agent to prevent oxidation of the sperical bismuth particles. PVP molecules were absorbed on the surface of bismuth nanospheres through the interaction of O-Bi bond which was confirmed by Fourier transform infrared (FT-IR) measurement. The thermal analysis shows the samples contained about 73 wt.% metallic bismuth. The optical absorption spectrum of poly(vinyl pyrrolidone)-capped bismuth nanosphere shows a strong absorption band at 275 nm. (C) 2009 Elsevier B.V. All rights reserved.
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