Constructing Hierarchical Heterostructured Mn3O4/Zn2SnO4 Materials for Efficient Gas Sensing Reaction

Hybrid 1D nanomaterials with hierarchical structure have received a great deal of attention as sensing materials for gas sensors due to their high surface area, excellent catalytic performance, and robust structure. Novel Zn2SnO4 nanorod‐decorated Mn3O4 nanowire 1D nanostructures are prepared by a two‐step hydrothermal method and subsequent heat treatment for application in gas sensors. The branch‐like Mn3O4/Zn2SnO4 composite‐based sensor exhibits high sensitivity and excellent selectivity for the detection of acetone gas. Importantly, the sensitivity of acetone‐gas sensor can be improved by optimizing the content of Zn2SnO4 nanorods on the surface of Mn3O4 nanowires. As a result, such a 1D–1D branch‐like Mn3O4/Zn2SnO4 hierarchical structure with effective p–n heterojunction and large specific surface area would display excellent electron transport property, which determines if the material is capable of recognizing target gases, thus enabling the sensor to achieve high sensitivity. A highly sensitive acetone platform based on hierarchical heterostructure material is reported, which integrates Mn3O4 backbone with Zn2SnO4 branches. Such unique 1D structure exhibits a fascinating gas sensing performances including high sensitivity and fast response process for the precise detection of acetone gas molecules.