Highly sensitive and low detection limit of ethanol gas sensor based on hollow ZnO/SnO2 spheres composite material
Highly sensitive and low detection limit of ethanol gas sensor based on hollow ZnO/SnO2 spheres composite material
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基于空心ZnO/SnO2球复合材料的高灵敏低检出限乙醇气体传感器
DOI：
10.1016/j.snb.2017.01.148
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发表时间：
2017-06-01
影响因子：
8.4
通讯作者：
Lu, Geyu
中科院分区：
文献类型：
--
作者：
Liu, Jiangyang;Wang, Tianshuang;Lu, Geyu
采用溶液法制备了具有中空纳米结构的氧化锌/二氧化锡异质结复合材料。用X射线衍射仪(XRD)、场发射电子扫描显微镜(FESEM)、透射电子显微镜(TEM)和X射线光电子能谱(XPS)对产物进行了表征。结果表明，在SnO2空心球表面可以清晰地观察到氧化锌纳米颗粒的存在，并且氧化锌/SnO2复合材料的表面吸氧能力远高于单一组分SnO2。结果表明，该复合材料对乙醇具有良好的传感性能，在其最佳温度下，对30ppm乙醇的响应比纯SnO2高近7倍。此外，值得注意的是，这种气体传感器显示出低检测下限(ppb级)。这种增强的传感性能可能归因于异质结的形成和SnO2与ZnO之间的协同作用。(C)2017爱思唯尔B.V.保留所有权利。
Heterostructure ZnO/SnO2 composites material with a hollow nanostructure was synthesized by solution method. The obtained products were characterized by X-ray diffraction (XRD), field-emission electron scanning microscopy (FESEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The results indicated that ZnO nanoparticles could be clearly observed on the surface of SnO2 hollow spheres and the surface oxygen chemisorbed ability of ZnO/SnO2 composites was much higher than that of single-component SnO2. The as-synthesized composites as sensing material was investigated and the results revealed that such composites had an excellent sensing performance to ethanol, and the response to 30 ppm ethanol was nearly 7-times higher than that of pristine SnO2 at its optimum temperature. Moreover, it is noteworthy that such gas sensor showed a low detection limit (ppb-level). The enhanced sensing properties might be attributed to the formation of heterojunction and synergistic effect between SnO2 and ZnO. (C) 2017 Elsevier B.V. All rights reserved.