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首页> 美国卫生研究院文献>Micromachines >Detection of Cigarette Smoke Using a Surface-Acoustic-Wave Gas Sensor with Non-Polymer-Based Oxidized Hollow Mesoporous Carbon Nanospheres
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Detection of Cigarette Smoke Using a Surface-Acoustic-Wave Gas Sensor with Non-Polymer-Based Oxidized Hollow Mesoporous Carbon Nanospheres

机译：使用基于非聚合物的氧化空心中孔碳纳米球的表面声波气体传感器检测卷烟烟雾

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The objective of this research was to develop a surface-acoustic-wave (SAW) sensor of cigarette smoke to prevent tobacco hazards and to detect cigarette smoke in real time through the adsorption of an ambient tobacco marker. The SAW sensor was coated with oxidized hollow mesoporous carbon nanospheres (O-HMC) as a sensing material of a new type, which replaced a polymer. O-HMC were fabricated using nitric acid to form carboxyl groups on carbon frameworks. The modified conditions of O-HMC were analyzed with Scanning Electron Microscopy (SEM), Fourier transform infrared spectrometry (FTIR), and X-ray diffraction (XRD). The appropriately modified O-HMC are more sensitive than polyacrylic acid and hollow mesoporous carbon nanospheres (PAA-HMC), which is proven by normalization. This increases the sensitivity of a standard tobacco marker (3-ethenylpyridine, 3-EP) from 37.8 to 51.2 Hz/ppm and prevents the drawbacks of a polymer-based sensing material. On filtering particles above 1 μm and using tar to prevent tar adhesion, the SAW sensor detects cigarette smoke with sufficient sensitivity and satisfactory repeatability. Tests, showing satisfactory selectivity to the cigarette smoke marker (3-EP) with interfering gases CH4, CO, and CO2, show that CO and CO2 have a negligible role during the detection of cigarette smoke.
机译：这项研究的目的是开发一种香烟烟雾的表面声波（SAW）传感器，以防止烟草危害并通过吸附周围的烟草标记物实时检测香烟烟雾。 SAW传感器涂有氧化空心中孔碳纳米球（O-HMC）作为新型传感材料，代替了聚合物。 O-HMC使用硝酸制备，以在碳骨架上形成羧基。 O-HMC的修饰条件通过扫描电子显微镜（SEM），傅里叶变换红外光谱（FTIR）和X射线衍射（XRD）进行分析。经过适当修饰的O-HMC比聚丙烯酸和中孔介孔碳纳米球（PAA-HMC）更为敏感，这已通过归一化证明。这将标准烟草标记（3-乙烯基吡啶，3-EP）的敏感性从37.8提高到51.2 Hz / ppm，并防止了基于聚合物的传感材料的缺点。在过滤1μm以上的颗粒并使用焦油防止焦油粘附时，声表面波传感器能够以足够的灵敏度和令人满意的重复性检测香烟烟雾。测试显示，对干扰气体CH4，CO和CO2的香烟烟雾标记（3-EP）的选择性令人满意，表明在检测香烟烟雾期间，CO和CO2的作用微不足道。

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