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   μM, low detection limit of 0.02   μM ( S / N   =   3), good reproducibility, and long-term stability.