ACS Appl Mater Interfaces. 2019 Feb 6;11(5):5240-5246. doi: 10.1021/acsami.8b18428. Epub 2019 Jan 24.
Three PbTiO nanostructures were synthesized using a one-step hydrothermal reaction with different TiO powders as Ti sources, and their gas-sensing properties were investigated. The sensor comprising PbTiO nanoplates (NPs) exhibited a high response (resistance ratio = 80.4) to 5 ppm ethanol at 300 °C and could detect trace concentrations of ethanol down to 100 ppb. Moreover, the sensor showed high ethanol selectivity and nearly the same sensing characteristics despite the wide range of humidity variation from 20 to 80% RH. The mechanism for humidity-independent gas sensing was elucidated using diffuse reflectance infrared Fourier transform spectra. PbTiO NPs are new and promising sensing materials that can be used for detecting ethanol in a highly sensitive and selective manner with negligible interference from ambient humidity.
三种 PbTiO 纳米结构是通过一步水热反应，以不同的 TiO 粉末作为钛源合成的，并研究了它们的气体传感性能。由 PbTiO 纳米板 (NPs) 组成的传感器对 5 ppm 乙醇在 300°C 下表现出高响应（电阻比=80.4），并且能够检测低至 100 ppb 的痕量乙醇。此外，尽管湿度从 20%到 80%RH 变化范围很宽，但传感器仍表现出高的乙醇选择性和几乎相同的传感特性。使用漫反射红外傅里叶变换光谱阐明了湿度独立气体传感的机制。PbTiO NPs 是新型的有前途的传感材料，可用于以高灵敏度和选择性检测乙醇，几乎不受环境湿度的干扰。
