Carbon monoxide gas sensing properties of metal-organic frameworks-derived tin dioxide nanoparticles/molybdenum diselenide nanoflowers

• Published in: Sensors and actuators. B, Chemical Vol. 304; p. 127369
• Main Authors: Yang, Zhimin, Zhang, Dongzhi, Wang, Dongyue
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01-02-2020; Elsevier Science Ltd
• Subjects: Carbon dioxide; Carbon monoxide; CO detection; Detection; Gas sensors; Gases; Heterojunctions; Hydrogen sulfide; Metal-organic frameworks; Molybdenum; Molybdenum compounds; Nanocomposites; Nanoparticles; Resistive gas sensor; Room temperature; Selectivity; SnO2/MoSe2 composite; Sulfur dioxide; Tin dioxide; SnO2/MoSe2 composite; Resistive gas sensor; Metal-organic frameworks; CO detection
• ISSN: 0925-4005; 1873-3077
• DOI: 10.1016/j.snb.2019.127369

•Facile synthesis of MOFs-derived SnO2 nanoparticles-decorated MoSe2 nanoflowers for the development of highly sensitive gas sensors.•The SnO2/MoSe2 heterostructure showed excellent CO-sensing and anti-humidity interference properties at room temperature.•The enhanced CO sensing properties were attributed to formation of a heterojunctions and surface defects between SnO2 and MoSe2.
A novel metal-organic frameworks-derived tin dioxide nanoparticles/molybdenum diselenide nanoflowers (SnO2/MoSe2) nanocomposite was designed by a facile hydrothermal method. Various characterization techniques demonstrated the successful preparation of the SnO2/MoSe2 nanostructures. The SnO2/MoSe2 composite with SnO2 and MoSe2 mass ratio of 4:1 exhibited a high response towards CO gas sensing at room temperature. The systematical gas sensing tests showed that the SnO2/MoSe2 composite at room temperature exhibited fast gas response/recovery speed, excellent repeatability, and anti-humidity interference for CO detection. It also showed an outstanding selectivity to CO against various potential interfering gases such as SO2, H2S, CH4, H2 and CO2. Further studies indicated that the SnO2/MoSe2 nanocomposite improved CO gas performance due to the n-n heterojunction formed at the interface between SnO2 nanoparticles and MoSe2 nanoflowers.