Abstract The performance of SnO2 as a sensor of gaseous ethanol was experimentally and theoretically investigated. SnO2 particles were synthesized via a hydrothermal method. A side-heated sensor was fabricated and its sensing properties for various vapors were experimentally tested. The influence of the nanostructure and morphology of SnO2 particles on their sensing ability was also investigated. The results suggest that hollow-sphere structured SnO2 has a better sensing performance than other morphologies. Under an operating temperature of 330 °C, the response of SnO2 to ethanol gas was found to be ~68 times higher than that of the other tested gases. Additionally, a general mechanism describing the performance of the SnO2 sensor in the presence of gaseous ethanol is presented, and supported by density functional theory (DFT) calculations to explore the electrical properties of bulk SnO2 and its (110) surface. It is suggested that SnO2-based nanostructured materials can be employed in selective and efficient sensors of gaseous ethanol.

中文翻译：

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纳米SnO2气敏特性的研究与DFT计算

摘要 通过实验和理论研究了SnO2作为气态乙醇传感器的性能。SnO2 颗粒是通过水热法合成的。制造了一个侧面加热的传感器，并对其对各种蒸汽的传感特性进行了实验测试。还研究了 SnO2 颗粒的纳米结构和形貌对其传感能力的影响。结果表明，空心球结构的 SnO2 具有比其他形态更好的传感性能。在 330 °C 的工作温度下，发现 SnO2 对乙醇气体的响应比其他测试气体高约 68 倍。此外，还介绍了描述 SnO2 传感器在气态乙醇存在下的性能的一般机制，并得到密度泛函理论 (DFT) 计算的支持，以探索体 SnO2 及其 (110) 表面的电性能。建议基于 SnO2 的纳米结构材料可用于选择性和高效的气态乙醇传感器。