Fabrication of Hierarchical Hollow Manganese Silicate Spheres for the Simultaneous Enhanced Determination of 2‐Aminophenol and 4‐Aminophenol

Abstract We developed a new electrochemical method for the simultaneous determination of 2‐aminophenol (2‐AP) and 4‐aminophenol (4‐AP) based on hollow manganese silicate spheres. The hierarchical hollow structure of manganese silicate submicrometer spheres was formed by the assemblage of numerous nanobubbles, as confirmed by scanning electron microscopy and transmission electron microscopy images. As sensing material for the simultaneous determination of 2‐AP and 4‐AP for the first time, the electrochemical performances of 2‐AP and 4‐AP were studied in detail. The detection limits (S/N=3) for 2‐AP and 4‐AP were as low as 18 and 11 nM, respectively.