【作者】 温旭光；

【导师】 王敏；

【作者基本信息】 浙江大学 ， 分析化学， 2011， 硕士

【摘要】 氢气作为一种清洁能源具有极好的应用前景,但氢气的易爆性对其应用推广造成很大的障碍,需要不断研制开发灵敏高效、易于使用的氢气传感器监控氢气的存储运输以及使用。二氧化锡-钯材料常见于氢气传感器。近来,使用一锅水热法合成的新型二氧化锡纳米层片具有非常薄的尺度以及极高的表面积。本工作主要探索了该二氧化锡纳米层片的气体传感性能。通过湿化学沉积方法,二氧化锡纳米层片以及钯被沉积到氧化铝陶瓷基底表面形成一层钯-纳米二氧化锡薄膜,整个制备过程在室温下进行且不需要加热处理。钯-纳米二氧化锡膜状传感器可以在室温下对100--1500 ppm氢气快速响应,重复性良好。此外还考察了薄膜构成(钯锡比率)、退火温度、湿度等因素对钯-纳米二氧化锡膜状传感器氢气检测的影响。更多还原

【Abstract】 Hydrogen has excellent prospects as a clean energy, but the explosive nature of hydrogen causes a great obstacle to its application. Sensitive, effective and easy-to-use hydrogen sensors are needed to prevent hydrogen leak during the storage, transportation and use of hydrogen. SnO2 and Pd materials are commonly used in hydrogen sensors. Recently, extremely thin SnO2 nanosheets with high surface area was fabricated through a one-pot hydrothermal method. In this work, the gas sensing property of the SnO2 nanosheets was further explored. SnO2-Pd mixed thin films were prepared by electroless deposition of nanostructured SnO2 and Pd onto the surface of a high resistance alumina substrate. The whole fabrication process was carried out at room temperature without any further treatment required. It has been found that the SnO2-Pd sensor has a high response in the range of 100-1500 ppm toward hydrogen gas at room temperature with a short response time. The sensor also shows good repeatability. Effects of the composition (Pd/Sn ratio) of the sensing film, annealing condition and influence of humidity on the H2 gas sensitivity were investigated as well.更多还原