Rutin detection using highly electrochemical sensing amplified by an Au–Ag nanoring decorated N-doped graphene nanosheet†

Cui'e Zou, Duan Bin, Beibei Yang, Ke Zhang and Yukou Du*（杜玉扣）

College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China.

RSC Adv., 2016, 6, 107851-107858

A hybrid nanostructure of Au–Ag nanorings prepared by decorating the surface of N-doped graphene (NG) was utilized as an electrocatalyst to construct a novel electrochemical sensor. Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) were used to characterize the as-prepared composites. The Au–Ag nanorings/NG modified electrode exhibited a much better electrochemical response of rutin than that of Au/NG, Ag/NG and NG due to the synergetic catalytic effect between the Au–Ag nanorings and NG. Under optimal conditions, the electrochemical sensor of the Au–Ag nanorings/NG exhibited a wide linear range from 0.05 μM to 241.2 μM (S/N = 3) with a low detection limit of 0.01 μM. In addition, the proposed sensor also displayed good anti-interference ability and long-term stability, which had promising applications in bioassay analysis.

链接：http://pubs.rsc.org/en/content/articlehtml/2016/ra/c6ra22264a