Enhanced ultra-stable n-propylamine sensing behavior of V₂O₅/In₂O₃ core–shell nanorods
2015
Shah, Abdul Hakim | Liu, Yueli | Nguyễn, Văn Tu | Zakharova, Galina S. | Mehmood, Ikhtisham | Chen, Wen
Heterostructured V₂O₅/In₂O₃ core–shell nanorods were prepared by the combination of solid solution and hydrothermal methods. Microstructural and spectroscopic studies reveal the effective core–shell hetero-nanostructure. The gas sensor based on these nanorods exhibits remarkable gas sensing properties in both static and dynamic modes. It presents an optimum working temperature of 190 °C, a reasonable response speed and high selectivity with an ultra-stable reproducible response for n-propylamine. The sensor also shows enhanced optimum sensitivity (∼14), which is 3.90 times that of the pure V₂O₅ nanorods. Such promising gas sensing behavior of the hetero-nanostructured core–shell nanorods is explained using an energy band model and a suitable gas sensing mechanism has been established as well.
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