Fabrication of hierarchical flower-like porous ZnO nanostructures from layered ZnC2O4·3Zn(OH)2 and gas sensing properties

- Hierarchical flower-like porous ZnO nanostructures are synthesized.
- Layered precursor of zinc oxalate hydroxide are first prepared with oxalic acid assistant facile hydrothermal method and according to the method, the material growth mechanism was discussed.
- The sensor based on such flower-like porous ZnO nanostructures exhibits excellent gas sensitive properties for ethanol.