Abstract

Herein, we report the synthesis of BaSnO3 (BSO) from molten salts (BSO1) and test its efficacy as an ethanol sensor, for the first time. BSO was also synthesized using a more well-established coprecipitation method (BSO2), and the influence of the synthesis method on morphology, microstructure and surface chemical composition of BSO was compared using electron microscopy, x-ray diffraction and photoelectron spectroscopy. Both BSO1 and BSO2 exhibited their best responses to 100 ppm of ethanol at 260 °C, but BSO1 showed higher response (12.5) and lower detection limit (0.5 ppm) compared to those of BSO2 (8.2 and 1 ppm) suggesting its superior ethanol sensing properties. The improved sensing of BSO1 was correlated with the corresponding surface morphology and chemical composition.

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