Microwave-assisted synthesis of palladium nanocubes and nanobars

被引:41
|
作者
Yu, Yanchun [1 ]
Zhao, Yanxi [1 ]
Huang, Tao [1 ]
Liu, Hanfan [1 ,2 ]
机构
[1] S Cent Univ Nationalities, Coll Chem & Mat Sci, Key Lab Catalysis & Mat Sci, State Ethn Affairs Commiss & Minist Educ, Wuhan 430074, Peoples R China
[2] Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
关键词
Metals; Nanostructures; Chemical synthesis; Electron diffraction; PD NANOWIRE ARRAYS; COUPLING REACTIONS; POLYOL PROCESS; NANOPARTICLES; NANOSTRUCTURES; OXIDATION; CATALYST; ELECTROCATALYSTS; MORPHOLOGY;
D O I
10.1016/j.materresbull.2009.09.028
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
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.
引用
收藏
页码:159 / 164
页数:6
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