Abstract

Gas sensing properties at room temperature and energy harvesting performances are realized for the polyvinylidene fluoride (PVDF) nanocomposites containing titanium dioxide (TiO₂) nanotubes grown in the presence of carbon nanotubes (CNT). While hydrothermal reaction is practiced for the development of TiO₂/CNT hybrid nanotubes, spin coating is done for the nanocomposite films to be deposited on sensing electrodes. Influence of various filler concentrations and the synergistic combination of fillers on the sensing characteristics are studied by recording the response times and the stability of the results. Upon exposure to liquefied petroleum gas, the PVDF/TiO₂-CNT (2.5 wt.%) gas sensor shows a sensing response of 0.45 s (400 ppm LPG), approximately nine times higher than the composite containing 2.5 wt.% of TiO₂ or 2.5 wt.% CNT. The piezoelectric response of the samples is also recorded and correlated with the synergistic influence of the filler materials. The current study can stimulate a good trend in fabricating self-powered gas sensors from PVDF nanocomposites.

中文翻译：

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包含混合纳米管的气体传感和功率收集聚偏氟乙烯纳米复合材料

摘要

对于包含在碳纳米管（CNT）存在下生长的二氧化钛（TiO ₂）纳米管的聚偏二氟乙烯（PVDF）纳米复合材料，实现了室温下的气敏特性和能量收集性能。尽管实践了水热反应以开发TiO ₂ / CNT杂化纳米管，但对要沉积在传感电极上的纳米复合膜进行了旋涂。通过记录响应时间和结果的稳定性，研究了各种填料浓度和填料的协同组合对传感特性的影响。暴露于液化石油气中，PVDF / TiO ₂-CNT（2.5 wt。％）气体传感器显示出0.45 s（400 ppm LPG）的感应响应，比含2.5 wt。％TiO ₂或2.5 wt。％CNT的复合材料高约9倍。还记录了样品的压电响应，并将其与填充材料的协同作用相关联。当前的研究可以激发由PVDF纳米复合材料制造自供电气体传感器的良好趋势。