纳米晶材料
X射线光电子能谱
材料科学
正丁醇
氢氧化钾
丁醇
纳米
分析化学(期刊)
选择性
化学工程
透射电子显微镜
锌
纳米技术
乙醇
化学
色谱法
有机化学
复合材料
冶金
催化作用
工程类
作者
Tong Zou,Rui Zhao,Zidong Wang,Rongjun Zhao,Zhezhe Wang,Yue Yang,Xinxin Xing
标识
DOI:10.1016/j.physe.2018.06.002
摘要
ZnO nanocrystalline with a few nanometers in size were synthesized by a low-temperature solvothermal method from zinc acetate dihydrate (Zn(CH3COO)2·2H2O), potassium hydroxide (KOH) and ethanol (C2H5OH). X ray diffraction (XRD), transmission electron microscopy (TEM) and X ray photoelectron spectroscopy (XPS) were used to characterize the structure, morphology, specific surface area and chemical state of the samples. The analyzed results indicate that the ZnO nanocrystalline with good dispersion are several nanometers in size about 10 nm. The ZnO nanocrystalline was used as sensing material to fabricate an indirect-heating structure sensor and its gas sensing properties are tested. At the optimal operating temperature (340 °C), its gas response toward 500 ppm n-butanol is 148.11 and the response and recovery time are 20 and 8 s, respectively. The test results show that the sensitivity of the as-prepared gas sensor has high selectivity to n-butanol and good response/recovery characteristics, linear response, short-term repeatability, as well as the long-term stability. The experimental results show that the gas sensor based on ZnO nanocrystalline can be used in the detection and real-time monitoring of toxic gases, especially n-butanol gas, which makes it to be highly promising candidate for practical detectors for n-butanol gas.
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