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A green route to water soluble carbon nanotubes and in situ loading of silver nanoparticles

Chao-Hua Xue1,2, Ren-Jia Zhou1,2,3, Min-Min Shi1,2,5, Yan Gao1,2,3, Gang Wu1,2, Xiao-Bin Zhang4, Hong-Zheng Chen1,2,3,5 and Mang Wang1,2

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A green approach has been developed to synthesize water soluble multi-walled carbon nanotubes (MWNTs). Ag nanoparticles have been loaded on the as-synthesized MWNTs via the in situ solution method. The strategy is based on the introduction of hydroxyl and carboxyl groups through a mild modification of MWNTs via polycondensation of citric acid and D-sorbitol, improving the water solubility of MWNTs, giving rise to preferred sites of Ag nucleation, and providing mild in situ reducing agents. The modification of MWNTs and loading of Ag nanoparticles on MWNTs were demonstrated by Fourier transform infrared spectroscopy, thermogravimetric analysis, transmission electron microscopy, and scanning electron microscopy.


PACS

81.16.-c Methods of nanofabrication and processing

78.67.Ch Nanotubes

78.30.Er Solid metals and alloys

78.67.Bf Nanocrystals and nanoparticles

81.07.De Nanotubes

78.30.Hv Other nonmetallic inorganics

Subjects

Condensed matter: electrical, magnetic and optical

Nanoscale science and low-D systems

Dates

Issue 32 (13 August 2008)

Received 4 April 2008, in final form 20 May 2008

Published 4 July 2008



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