Hydrothermal preparation, formation mechanism and gas-sensing properties of novel Mn3O4 nano-octahedrons

• Published in: Materials letters Vol. 246; pp. 210 - 213
• Main Authors: Cao, Shixiu, Han, Tao, Peng, Lingling, Liu, Bitao
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-07-2019; Elsevier BV
• Subjects: Ethanol; Gas sensors; Hydrothermal; Manganese oxides; Manganese oxyhydroxides; Materials science; Mn3O4; Nanooctahedrons; Nanostructure; Octahedrons; Semiconductors; Sodium citrate; Synthesis; Nanooctahedrons; Mn3O4; Semiconductors; Gas sensors; Hydrothermal
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2019.02.127

•The Mn3O4 octahedrons and MnOOH 1D nanostructures were synthesized by a hydrothermal route.•The Mn3O4 nano-octahedrons showed excellent gas sensing performances towards ethanol.•It is important for preparations of other metallic oxide as gas sensitive material.
We reported the successful synthesis of novel Mn3O4 nano-octahedrons and MnOOH nanostructures via a facile hydrothermal method. Mn3O4 nano-octahedrons are with length of 350–400 nm and smooth surfaces. The sodium citrate (C6H5Na3O7) played a very important role in the formation of the nanostructures. A possible formation mechanism was proposed in detail. Furthermore, the Mn3O4 nano-octahedrons showed excellent ethanol gas-sensing properties. It is hoped that this study would help to further understand the synthesis and growth mechanism of other manganese oxide nanostructures.