Gas sensing properties of self-assembled ZnO nanotube bundles

Gas sensing properties of self-assembled ZnO nanotube bundles
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自组装ZnO纳米管束的气敏特性

DOI:
10.1039/c3ra42383b
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发表时间:
2013-08
期刊:
影响因子:
3.9
通讯作者:
Zhao, Liancheng
Zhao, Liancheng
中科院分区:
化学3区
文献类型:
--
作者:
Wang, Xuanzhang;Gao, Hong;Yang, Haibin;Zhao, Liancheng

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采用简单的溶液法在温和条件下合成了大尺寸的ZnO纳米管束。采用X射线衍射、扫描电子显微镜、透射电子显微镜、氮吸附-脱附和光致发光技术对产物的结构和光学性质进行了表征。基于ZnO纳米管束的传感器在230 °C的工作温度下对乙醇气体表现出优异的传感性能。传感器对100 ppm乙醇的灵敏度约为25.2,响应时间快(约3 s)。结果发现,ZnO纳米管束传感器显示出显着更好的传感性能,由于更大的表面积和更多的电子供体相关的氧空位相比,ZnO纳米棒束传感器。
Large-scale ZnO nanotube bundles were synthesized by a simple solution-based method under mild conditions. The structural and optical properties of the resultant products were characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, nitrogen adsorption–desorption and photoluminescence techniques. The sensor based on the ZnO nanotube bundles exhibited excellent sensing properties against ethanol gas at the operating temperature of 230 °C. The sensitivity of the sensor to 100 ppm ethanol was approximate 25.2 with a rapid response time (about 3 s). It was found that the ZnO nanotube bundle sensor displayed significantly better sensing performances due to a larger surface area and more electron donor related oxygen vacancies in comparison with the ZnO nanorod bundle sensor.
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