Simple synthesis of worm-like Au-Pd nanostructures supported on reduced graphene oxide for highly sensitive detection of nitrite

In this work, we developed a simple wet-chemical method for fabrication of worm-like Au-Pd nanostructures uniformly supported on reduced graphene oxide (Au-Pd/rGO), only with the assistance of polyethylene glycol monooleyl ether (Brij-35) as a growth-directing agent, a stabilizing agent, and a mild reducing agent. The as-prepared nanocomposites showed improved analytical performance for nitrite detection, which was further explored to construct a nitrite sensor with fast response, wide linear range from 0.05 to 1000.0 mu M, low detection limit of 0.02 mu M (S/N = 3), good reproducibility, and long-term stability. (C) 2014 Elsevier B.V. All rights reserved.