Xue Dongping, Wang Yan, Cao Jianliang, Zhang Zhanying
The Collaboration Innovation Center of Coal Safety Production of Henan Province, Jiaozuo 454000, China.
School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
Nanomaterials (Basel). 2018 Dec 8;8(12):1025. doi: 10.3390/nano8121025.
Developing the triethylamine sensor with excellent sensitivity and selectivity is important for detecting the triethylamine concentration change in the environment. In this work, flower-like CeO₂-SnO₂ composites with different contents of CeO₂ were successfully synthesized by the one-step hydrothermal reaction. Some characterization methods were used to research the morphology and structure of the samples. Gas-sensing performance of the CeO₂-SnO₂ gas sensor was also studied and the results show that the flower-like CeO₂-SnO₂ composite showed an enhanced gas-sensing property to triethylamine compared to that of pure SnO₂. The response value of the 5 wt.% CeO₂ content composite based sensor to 200 ppm triethylamine under the optimum working temperature (310 °C) is approximately 3.8 times higher than pure SnO₂. In addition, CeO₂-SnO₂ composite is also significantly more selective for triethylamine than pure SnO₂ and has better linearity over a wide range of triethylamine concentrations. The improved gas-sensing mechanism of the composites toward triethylamine was also carefully discussed.
开发具有优异灵敏度和选择性的三乙胺传感器对于检测环境中三乙胺浓度变化至关重要。在这项工作中，通过一步水热反应成功合成了具有不同CeO₂含量的花状CeO₂-SnO₂复合材料。采用了一些表征方法来研究样品的形貌和结构。还研究了CeO₂-SnO₂气体传感器的气敏性能，结果表明，与纯SnO₂相比，花状CeO₂-SnO₂复合材料对三乙胺具有增强的气敏性能。在最佳工作温度（310℃）下，基于5 wt.% CeO₂含量复合材料的传感器对200 ppm三乙胺的响应值比纯SnO₂高出约3.8倍。此外，CeO₂-SnO₂复合材料对三乙胺的选择性也明显高于纯SnO₂，并且在较宽的三乙胺浓度范围内具有更好的线性。还仔细讨论了复合材料对三乙胺气敏性能改善的机理。
