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

Autor(es)

da Silva, Anderson G. M. ^[1] ; Rodrigues, Thenner S. ^[1] ; Wang, Jiale ^[1] ; Yamada, Liliam K. ^[1] ; Alves, Tiago V. ^[1] ; Ornellas, Fernando R. ^[1] ; Ando, Romulo A. ^[1] ; Camargo, Pedro H. C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, BR-05508000 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Langmuir; v. 31, n. 37, p. 10272-10278, SEP 22 2015.
• Citações Web of Science: 22

Resumo

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-aminotbiophenol to p,p'-dimercaptoazobenzene by activated O-2. The activities at 632.8 nm excitation followed the order triangular prisms and quasi-spheres > wires >> cubes. These results indicated that the shape, optical properties, and crystal structure played an important role in the detected SPR-mediated activities. (AU)

• Processo FAPESP: 13/19861-6 - Nanomateriais metálicos controlados para aplicações em catálise
• Beneficiário: Pedro Henrique Cury Camargo
• Modalidade de apoio: Auxílio à Pesquisa - Regular