Department 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.
Nanotechnology. 2013 Oct 11;24(40):405706. doi: 10.1088/0957-4484/24/40/405706. Epub 2013 Sep 12.
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.
一种 Ag/AgCl@TiO2 纳米颗粒（NPs）的等离子体光催化剂通过一步超声化学法直接制备。Ag NPs 和 AgCl 共同沉积在 TiO2 NPs 上，采用该方法形成 Ag@TiO2 和 Ag/AgCl@TiO2。由于 Ag NPs 的局域表面等离激元效应，Ag/AgCl@TiO2 光催化剂的可见光吸收率显著提高，在可见光下光催化分解罗丹明 B 的活性大大提高。此外，由于超声化学法的优势，在等离子体催化剂中只需少量的 Ag 即可获得高的光催化活性。还分析了可见光驱动光催化活性增强的机理。
