Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Synthesis of Ag/TiO2 Core/Shell Nanoparticles with Antibacterial Properties

  • Lin, Yue (State Key Laboratory of Food Science and Technology, Jiangnan University) ;
  • Qiqiang, Wang (State Key Laboratory of Food Science and Technology, Jiangnan University) ;
  • Xiaoming, Zhang (State Key Laboratory of Food Science and Technology, Jiangnan University) ;
  • Zhouping, Wang (State Key Laboratory of Food Science and Technology, Jiangnan University) ;
  • Wenshui, Xia (State Key Laboratory of Food Science and Technology, Jiangnan University) ;
  • Yuming, Dong (School of Chemical and Material Engineering, Jiangnan University)
  • Received : 2011.02.17
  • Accepted : 2011.06.22
  • Published : 2011.08.20
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Abstract

Monodispersed Ag/$TiO_2$ core/shell nanoparticles were synthesized in solution via colloid-seeded deposition process using Ag nanoparticles as colloid seeds and $Ti(SO_4)_2$ as Ti-source respectively. Silver nitrate was reduced to Ag nanoparticles with $N_2H_4{\cdot}H_2O$ in the presence of CTAB as stabilizing agent. The titania sols hydrolyzed by the $Ti(SO_4)_2$ solution deposited on the surface of Ag nanoparticles to form the Ag/$TiO_2$ core/shell nanoparticles. Inductively coupled plasma atomic emission spectrometry (ICP-AES) showed low amount of Ag ion leaching from the Ag/$TiO_2$ core/shell nanoparticles. The Ag/$TiO_2$ core/shell nanoparticles indicated excellent antibacterial effects against Escherichia coli and maintained long-term antibacterial property.

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References

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