Synthesis of Tin Dioxide Nanooctahedra with Exposed High‐Index {332} Facets and Enhanced Selective Gas Sensing Properties

High and mighty: Octahedral SnO(2) particles bound by high-index {332} facets were synthesized by a simple hydrothermal route using SnCl(2)⋅5 H(2)O as the tin salt with the assistance of hydrochloric acid and poly(vinylpyrrolidone). These particles show excellent selective gas sensing performance because they have large numbers of dangling bonds on their surfaces.