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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 32, Number 8
BKCSDE 32(8)
August 20, 2011 

Synthesis of Ag/TiO2 core/shell nanoparticles with antibacterial Properties
Yue Lin*, Wang Qiqiang, Zhang Xiaoming, Wang Zhouping, Xia Wenshui, Dong Yuming
Nanocomposites, Spectroscopy, X-ray techniques
Monodispersed Ag/TiO2 core/shell nanoparticles were synthesized in solution via colloid-seeded deposition process using Ag nanoparticles as colloid seeds and Ti(SO4)2 as Ti-source respectively. Silver nitrate was reduced to Ag nanoparticles with N2H4·H2O in the presence of CTAB as stabilizing agent. The titania sols hydrolyzed by the Ti(SO4)2 solution deposited on the surface of Ag nanoparticles to form the Ag/TiO2 core/ shell nanoparticles. Inductively coupled plasma atomic emission spectrometry (ICP-AES) showed low amount of Ag ion leaching from the Ag/TiO2 core/shell nanoparticles. The Ag/TiO2 core/shell nanoparticles indicated excellent antibacterial effects against Escherichia coli and maintained long-term antibacterial property.
2607 - 2610
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