Study on the structure feature of SnO micro/nanostructure with interesting distribution characteristic of concentric annulus

The SnO micro/nanostructure with interesting distribution characteristic was synthesized by electrochemical anodization. The structural, morphological and photocatalytic properties of the SnO micro/nanostructure were investigated. The experimental results showed that the SnO displayed an interesting distribution characteristic of concentric annulus. The SnO near the fracture region was uniform and well-defined octahedron-like pattern. By contrast, the SnO away from the fracture region was self-assembled frond-like pattern. A feasible formation mechanism of this unique SnO micro/nanostructure was deduced as well. Moreover, the film exhibited 82.87% photodegradation rate of methylene blue, which was attributed to the strong light absorption and low recombination rate of photogenerated electros and holes.