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Chemcial Industry and Engineering 2015, Vol. 32 Issue (6) :18-21,57    DOI: 10.13353/j.issn.1004.9533.20131146
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Preparation and Thermal Decomposition of Silver Nanoparticles Protected with 3-Mercaptopropionic Acid
Yu Mingming, Liu Dongzhi, Li Wei, Zhou Xueqin
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

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Abstract 

In this paper double-function groups ligand-3-mercaptopropionic acid (MPA) was used as protective agent to prepare the silver nanoparticles via ligand exchange and chemical reduction reaction. The effect of double-function ligand on the preparation and thermal decomposition of silver nanoparticles was investigated. Silver nanoparticles with diameter around 50 nm were synthesized by ligand exchange reaction. However, the size of silver nanoparticles prepared by the chemical reduction method is around 10 nm. Elemental analysis and XPS results suggest that the silver nanoparticles protected with multi-layer MPA are obtained by the covalent bond between the sulfur atom and the Ag atom, hydrogen bonding and van der Waals force between alkyl chains. The sintering at 200 ℃ makes the cleavage of C—S bond and the silver nanoparticles decompose to silver sulfide.

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Articles by authors
Yu Mingming
Liu Dongzhi
Li Wei
Zhou Xueqin
Keywordssilver nanoparticles;   protective agent;   thermal decomposition     
Received 2013-05-24;
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Yu Mingming, Liu Dongzhi, Li Wei, Zhou Xueqin.Preparation and Thermal Decomposition of Silver Nanoparticles Protected with 3-Mercaptopropionic Acid[J]  Chemcial Industry and Engineering, 2015,V32(6): 18-21,57
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