Gas sensing properties of SnO2 hollow spheres/polythiophene inorganic–organic hybrids
Gas sensing properties of SnO2 hollow spheres/polythiophene inorganic–organic hybrids
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SnO2空心球/聚噻吩无机-有机杂化物的气敏性能
DOI：
10.1016/j.snb.2010.01.053
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发表时间：
2010-04
影响因子：
8.4
通讯作者：
中科院分区：
文献类型：
--
作者：
采用原位化学氧化聚合法制备了SnO 2空心球/聚噻吩杂化材料，并采用傅里叶红外光谱（FTIR）、X射线衍射（XRD）、透射电镜（TEM）和热重分析（TGA）等手段对材料进行了表征。结果表明，SnO 2空心球与聚噻吩之间存在较强的协同作用，且杂化材料的热稳定性高于纯聚噻吩，有利于其作为化学传感器的潜在应用。气敏实验表明，在90°C的工作温度下，基于该杂化材料的气敏元件对NO2具有较高的响应和较好的选择性，且恢复时间较短。杂化材料的气敏性能增强是由于杂化材料的高表面积以及p型聚噻吩与n型SnO 2空心球之间形成的p-n异质结。
SnO2hollow spheres/polythiophene hybrid materials were synthesized by an in situ chemical oxidative polymerization method, and characterized by Fourier transfer infrared (FTIR) spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM) and thermo-gravimetric analysis (TGA). It is proved that there is a strong synergetic interaction between the SnO2hollow spheres and polythiophene, and the hybrid materials had higher thermal stability than pure polythiophene, which is beneficial for potential application as chemical sensors. Gas sensing tests showed that the gas sensor based on the as-obtained hybrids had high sensor response and good selectivity, as well as comparatively short recovery time to NO2at a working temperature of 90°C. The enhanced gas sensing performance of the hybrids is due to the high surface area of the hybrids and the p–n heterojunction formed between p-type polythiophene and n-type SnO2hollow spheres.
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