Thermal synthesis of Cu@carbon spherical core-shell structures from carbonaceous matrices containing embedded copper particles

被引：44

作者：

Li, Haibo ^{[1
]}

Kang, Wenjun ^{[1
]}

Xi, Baojuan ^{[1
]}

Yan, Yan ^{[1
]}

Bi, Huiyun ^{[1
]}

Zhu, Yongchun ^{[1
]}

Qian, Yitai ^{[1
]}

机构：

[1] Univ Sci & Technol China, Dept Chem, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

来源：

CARBON | 2010年 / 48卷 / 02期

关键词：

NOBLE-METAL NANOPARTICLES; HYDROTHERMAL SYNTHESIS; COAXIAL NANOCABLES; AG/C NANOCABLES; FABRICATION; SUBMICROTUBES; NANOFIBERS; NANOWIRES; NANOTUBES; SPHERES;

D O I：

10.1016/j.carbon.2009.09.063

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A Cu@carbon (Cu@C) spherical core-shell structure has been synthesized from carbonaceous matrices containing embedded copper particles by thermal treatment at 600 degrees C under an argon atmosphere. The matrices are prepared by reducing CuCl2 with vitamin C (VC) in the existence of polyacrylamide (PAM) at 180 degrees C, accompanied by the partial carbonization of VC. It is found that small Cu nanoparticles with diameters of similar to 3 nm homogeneously disperse in the carbonaceous matrices. Subsequent thermal treatment at 600 degrees C under an argon atmosphere leads to the diffusion of these Cu nanoparticles and further carbonization of carbonaceous matrices to form a Cu@C core-shell structure. The core-shell ratio can be controlled by varying the dose of CuCl2, VC, or PAM. It is found that the carbon shell can effectively shield the metallic Cu core from oxidation in the mixed solution of dilute hydrogen peroxide and nitric acid. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：464 / 469

页数：6

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