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首页> 外文期刊>Ionics >Influence of surface defects and preferential orientation in nanostructured Ce-doped SnO2 thin films by nebulizer spray deposition for lowering the LPG sensing temperature to 150 degrees C
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Influence of surface defects and preferential orientation in nanostructured Ce-doped SnO2 thin films by nebulizer spray deposition for lowering the LPG sensing temperature to 150 degrees C

机译：用雾化器喷射沉积将表面缺陷和优先取向在纳米结构Ce掺杂的SnO2薄膜中的影响降低LPG感测温度至150℃

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摘要

Cerium-doped (0.1 to 6wt.%) nanostructured SnO2 thin films are prepared via nebulizer spray deposition process. The analyses show that the films grow in (301) and (211) preferred orientations. The fabricated sensing films are exposed to LPG at different ppm concentrations and different operating temperatures. In 500ppm of LPG at an operating temperature of 350 degrees C, an impressive sensitivity of 89.2 with response time of 7s and recovery time of 9s is shown by 2wt.% Ce-doped film, where the sensitivity is almost 18 times higher than that of pristine SnO2 film. The sensitivities get reduced to 25 at lesser operating temperature of 300 degrees C and to 1.17 at 150 degrees C. The films show significant selectivity to CO2, especially at operating temperatures above 300 degrees C. Raman and photoluminescence studies give an insight into oxygen vacancies and trapped states which influence the enhanced gas response.
机译：通过喷雾器喷雾沉积方法制备铈掺杂（0.1至6wt％）纳米结构的SnO2薄膜。 分析表明，薄膜在（301）和（211）的优选方向上生长。 制造的传感膜以不同的PPM浓度和不同的操作温度暴露于LPG。 在500ppm的LPG在350℃的工作温度下，89.2的响应时间为7s和9s的恢复时间的令人印象深刻的敏感性，由2wt表示。％Ce-掺杂薄膜，灵敏度几乎高于高于的薄膜 原始的SnO2薄膜。 敏感性在较小的工作温度下在300摄氏度下减少到25，并且在150℃下为1.17。薄膜对CO 2显着选择性，特别是在300摄氏度高于300度C.拉曼和光致发光的研究中熟悉氧气空位和 陷阱影响了增强的气体反应。

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