Article ID Journal Published Year Pages File Type
7149201 Sensors and Actuators B: Chemical 2013 7 Pages PDF
Abstract
We report the synthesis of CuOSnO2 nanocomposite nanofibers of various chemical compositions via electrospinning as well as their excellent H2S sensing capabilities. The results of X-ray diffraction and high-resolution electron transmission microscopy demonstrate that the nanofibers are a mixture of the tetragonal rutile structure of SnO2 and the monoclinic structure of CuO in the form of nanograins. Each nanograin shows a single phase of either CuO or SnO2, instead of forming their solid-solution phase. In other words, a CuOSnO2 nanocomposite structure is realized in a true sense. The sensing properties of the CuOSnO2 nanocomposite nanofibers are well explained based on the creation and extinction of the p-n junctions between CuO and SnO2 nanograins. The p-n junctions that are readily created in such nanocomposite due to the presence of nanograins as well as the high specific surface area provided by the one-dimensional nanofiber shape are responsible for the outstanding H2S sensing performances of the CuOSnO2 nanofibers.
Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
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