Facile synthesis of bimetallic Cu-Ag nanoparticles under microwave irradiation and their oxidation resistance

被引：70

作者：

Chen, Zhi ^{[1
,2
]}

Mochizuki, Dai ^{[2
]}

Maitani, Masato M. ^{[2
]}

Wada, Yuji ^{[2
]}

机构：

[1] China Jiliang Univ, Coll Mat Sci & Engn, Hangzhou 310018, Zhejiang, Peoples R China

[2] Tokyo Inst Technol, Grad Sch Sci & Engn, Dept Appl Chem, Meguro Ku, Tokyo 1528552, Japan

来源：

NANOTECHNOLOGY | 2013年 / 24卷 / 26期

关键词：

METALLIC COPPER NANOPARTICLES; LMM AUGER-SPECTRA; SHELL NANOPARTICLES; IN-SITU; SILVER; XPS; PHOTOELECTRON; FABRICATION; ABSORPTION; GROWTH;

D O I：

10.1088/0957-4484/24/26/265602

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Air-stable bimetallic Cu-Ag nanoparticles in the range of 12-30 nm have been synthesized at gram scale by a facile alcohol reduction in the absence of surfactants with the assistance of microwave irradiation. The synthesized nanoparticles were analyzed by x-ray powder diffraction (XRD), transmission electron microscopy (TEM), scanning TEM, ultraviolet-visible spectroscopy, x-ray photoelectron spectroscopy and thermogravimetry (TG). The stability of the bimetallic nanoparticles against oxidation was examined by TG and in situ temperature-programmed XRD analyses in the atmosphere. No oxidation of copper was confirmed by XRD after storing for longer than 6 months in the atmosphere at room temperature. No oxidation took place below 118 degrees C and the Cu(200) diffraction peak decreased by only 7% after heating at 100 degrees C for 30 min. The oxidation resistance has been ascribed to a Cu core-Ag shell structure, probably owing to the suppressive effect of Ag on the surface through the electronic interaction with Cu and a physical barrier of oxygen.

引用

页数：9

共 39 条

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