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Keywords:

  • copper;
  • electrochemical properties;
  • nanotubes;
  • templated synthesis;
  • tin oxide
Thumbnail image of graphical abstract

SnO2 tube-in-tube nanostructures are synthesized using Cu@C nanocables as effective sacrificial templates. It is revealed by stripping voltammetry that SnO2 tube-in-tube nanostructures show excellent performances in the determination of heavy metal ions, which might be related to the extraordinary adsorbing capacities of the hollow structure to metal ions, i.e., metal ions could diffuse into the interior of tubular structure.