期刊
MATERIALS RESEARCH BULLETIN
卷 45, 期 2, 页码 159-164出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2009.09.028
关键词
Metals; Nanostructures; Chemical synthesis; Electron diffraction
资金
- National Nature Science Foundation of China [20673146]
- Nature Science Foundation of Hubei Province [2006ABA366]
- Science Foundation of South-Central University for Nationalities [YZZ05002]
Microwave was employed in the shape-con trolled synthesis of palladium nanoparticles. Palladium nanocubes and nanobars with a mean size of about 23.8 nm were readily synthesized with H2PdCl4 as a precursor, tetraethylene glycol (TEG) as both a solvent and a reducing agent in the presence of PVP and CTAB in 80 s under microwave irradiation. The structures of the as-prepared palladium nanoparticles were characterized by transmission electron microscopy (TEM), X-ray powder diffraction (XRD) and ultraviolet-visible (UV-vis) absorption spectroscopy. The formation of PdBr(4)(2-)due to the coordination replacement of the ligand Cl- ions in PdCl42- ions by Br- ions in the presence of bromide was responsible for the synthesis of Pd nanocubes and nanobars. In addition, a milder reducing power, a higher viscosity and a stronger affinity of TEG were beneficial to the larger sizes of Pd nanocubes and nanobars. (C) 2009 Elsevier Ltd. All rights reserved.
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