Hydrothermal preparation, formation mechanism and gas-sensing properties of novel Mn_3O_4 nano-octahedrons

摘要

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. (C) 2019 Published by Elsevier B.V.