氧化锡纳米球的合成及其对氢气的气敏特性
发布时间：2019-04-25 09:37
【摘要】：利用聚乙烯吡咯烷酮(PVP)作为表面活性剂,将四氯化锡(SnCl_4)溶解在甲醇溶液中,再通过溶剂热法,制备了多孔氧化锡(SnO_2)纳米球。采用X射线衍射(XRD)仪和扫描电子显微镜(SEM)对合成材料的结构和形貌进行了表征。结果表明,SnO_2纳米球为分布均匀的多孔球。同时,采用旁热式气敏元件结构对样品进行氢气(H_2)敏感性能研究,测试结果证明制作的气体传感器对氢气表现出良好的气敏特性,在最佳工作温度250℃下对体积分数10~(-4)氢气的响应可达到6,最低体积分数检测极限为5×10~(-6),并且响应时间和恢复时间分别为2 s和4 s。
[Abstract]:Porous tin oxide (SnO_2) nanospheres were prepared by solvothermal method by dissolving tin tetrachloride (SnCl_4) in methanol solution using polyvinylpyrrolidone (PVP) as surfactant. The structure and morphology of the synthesized materials were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The results show that the SnO_2 nanospheres are porous spheres with uniform distribution. At the same time, the structure of the gas sensor is used to study the hydrogen sensitivity of the sample. The test results show that the gas sensor has good gas sensitivity to hydrogen. At the optimum working temperature of 250 鈩，
本文编号：2464982
[Abstract]:Porous tin oxide (SnO_2) nanospheres were prepared by solvothermal method by dissolving tin tetrachloride (SnCl_4) in methanol solution using polyvinylpyrrolidone (PVP) as surfactant. The structure and morphology of the synthesized materials were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The results show that the SnO_2 nanospheres are porous spheres with uniform distribution. At the same time, the structure of the gas sensor is used to study the hydrogen sensitivity of the sample. The test results show that the gas sensor has good gas sensitivity to hydrogen. At the optimum working temperature of 250 鈩，
本文编号：2464982
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