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

Autor: da Silva AG; Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo , Av. Prof. Lineu Prestes 748, 05508-000 São Paulo, São Paulo, Brazil., Rodrigues TS; Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo , Av. Prof. Lineu Prestes 748, 05508-000 São Paulo, São Paulo, Brazil., Wang J; Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo , Av. Prof. Lineu Prestes 748, 05508-000 São Paulo, São Paulo, Brazil., Yamada LK; Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo , Av. Prof. Lineu Prestes 748, 05508-000 São Paulo, São Paulo, Brazil., Alves TV; Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo , Av. Prof. Lineu Prestes 748, 05508-000 São Paulo, São Paulo, Brazil., Ornellas FR; Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo , Av. Prof. Lineu Prestes 748, 05508-000 São Paulo, São Paulo, Brazil., Ando RA; Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo , Av. Prof. Lineu Prestes 748, 05508-000 São Paulo, São Paulo, Brazil., Camargo PH; Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo , Av. Prof. Lineu Prestes 748, 05508-000 São Paulo, São Paulo, Brazil.
Jazyk: angličtina
Zdroj: Langmuir : the ACS journal of surfaces and colloids [Langmuir] 2015 Sep 22; Vol. 31 (37), pp. 10272-8. Date of Electronic Publication: 2015 Sep 10.
DOI: 10.1021/acs.langmuir.5b02838
Abstrakt: 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'-dimercaptoazobenzene by activated O2. 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.
Databáze: MEDLINE