The Fault in Their Shapes: Investigating the Surface-Plasmon-Resonance-Mediated Catalytic Activities of Silver Quasi-Spheres, Cubes, Triangular Prisms, and Wires

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• 作者：Anderson G. M. da Silva ; Thenner S. Rodrigues ; Jiale Wang ; Liliam K. Yamada ; Tiago V. Alves ; Fernando R. Ornellas ; R么mulo A. Ando ; Pedro H. C. Camargo
• 刊名：Langmuir
• 出版年：2015
• 出版时间：September 22, 2015
• 年：2015
• 卷：31
• 期：37
• 页码：10272-10278
• 全文大小：417K
• ISSN：1520-5827

文摘

The surface-plasmon-resonance (SPR)-mediated catalytic activities of Ag and Au nanoparticles have emerged a relatively new frontier in catalysis in which visible light can be employed as an eco-friendly energy input to drive chemical reactions. Although this phenomenon has been reported for a variety of transformations, the effect of the nanoparticle shape and crystalline structure on the activities remains unclear. In this paper, we investigated the SPR-mediated catalytic activity of Ag quasi-spheres, cubes, triangular prisms, and wires toward the oxidation of p-aminothiophenol to p,p鈥?dimercaptoazobenzene by activated O₂. The activities at 632.8 nm excitation followed the order triangular prisms and quasi-spheres > wires 鈮?cubes. These results indicated that the shape, optical properties, and crystal structure played an important role in the detected SPR-mediated activities.