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Nanotechnology. 2013 Oct 11;24(40):405706. doi: 10.1088/0957-4484/24/40/405706. Epub 2013 Sep 12.

Hierarchical visible-light-response Ag/AgCl@TiO2 plasmonic photocatalysts for organic dye degradation.

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  • 1Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea. School of Materials Science and Engineering, Zhengzhou University, 450001, People's Republic of China.


A plasmonic photocatalyst of Ag/AgCl@TiO2 nanoparticles (NPs) was directly prepared by a one-step sonochemical method. Both Ag NPs and AgCl were co-deposited on TiO2 NPs to form Ag@TiO2 and Ag/AgCl@TiO2 using the method. Due to the localized surface plasmonic effects of Ag NPs, the visible-light absorbance of the Ag/AgCl@TiO2 photocatalyst was dramatically increased and the photocatalytic activity to decompose Rhodamine B was much improved under visible light. In addition, due to the advantages of the sonochemical approach, only a very small amount of Ag is required to obtain a high photocatalytic activity in the plasmonic catalyst. The mechanism for the enhancement of the visible-light-driven photocatalytic activities was also analyzed.

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