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首页> 外文期刊>RSC Advances >A high-performance n-butanol gas sensor based on ZnO nanoparticles synthesized by a low-temperature solvothermal route
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A high-performance n-butanol gas sensor based on ZnO nanoparticles synthesized by a low-temperature solvothermal route

机译：基于低温溶剂热法合成的ZnO纳米粒子的高性能正丁醇气体传感器

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摘要

ZnO nanoparticles with high crystallinity and several nanometers in size were synthesized by a low-temperature solvothermal route from zinc acetate dihydrate (Zn(CH3COO)(2)center dot 2H(2)O), potassium hydroxide (KOH) and methanol (CH3OH). The structural and the morphological characterizations of the ZnO nanoparticles were performed by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and N-2-sorption isotherms. The obtained nanoparticles are highly crystalline wurtzite-type ZnO with a uniform near-spherical shape and an average particle size estimated to be 8.4 +/- 1.3 nm. Such a small particle size and slight agglomeration are attributed to the use of methanol, which acts as both a solvent and an inhibitor of growth and agglomeration. The assynthesized ZnO nanoparticles were directly used as a gas sensing material toward n-butanol gas. Such a designed sensor device exhibits several advantages such as a high and fast response, short recovery time, and good stability toward n-butanol gas. At the optimal operating temperature (320 degrees C), its gas response toward 500 ppm n-butanol is 805 and the response and recovery times are 22 and 6 seconds, respectively.
机译：通过低温溶剂热法，由醋酸锌二水合物（Zn（CH3COO）（2）中心点2H（2）O），氢氧化钾（KOH）和甲醇（CH3OH）合成了具有高结晶度和几纳米大小的ZnO纳米颗粒。通过X射线粉末衍射（XRD），透射电子显微镜（TEM），X射线光电子能谱（XPS）和N-2-吸附等温线对ZnO纳米颗粒进行结构和形态表征。所获得的纳米粒子是具有均匀的近球形形状的高结晶纤锌矿型ZnO，并且平均粒径估计为8.4 +/- 1.3nm。如此小的粒度和轻微的团聚归因于使用甲醇，甲醇既充当溶剂又是生长和团聚的抑制剂。合成的ZnO纳米颗粒直接用作对正丁醇气体的气敏材料。这样设计的传感器装置表现出诸如高和快速响应，短的恢复时间以及对正丁醇气体的良好稳定性的若干优点。在最佳工作温度（320摄氏度）下，其对500 ppm正丁醇的气体响应为805，响应和恢复时间分别为22秒和6秒。

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